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When the keyboardWillHideFunction is called the whole view from the viewController jerks upward. Below is a video of the probelm occuring.
vidoe of screen jerking
Below is the code I am using to control keyboard notifications. I have tried playing around with the animation times and the layout constraints but I havent been able to get much further. Any suggestions on how to fix it thank you.
EDITED CODE BASED ON SUGGESTIONS- Ive tried creating a variable for the layout constraints as suggested however the problem still persists any ideas why?
import UIKit
import Foundation
extension UIView {
func currentFirstResponder() -> UIResponder? {
if self.isFirstResponder {
return self
}
for view in self.subviews {
if let responder = view.currentFirstResponder() {
return responder
}
}
return nil
}
}
extension Notification.Name{
static let showKeyboard = Notification.Name("showKeyboard")
}
class KeyboardSlider: NSObject {
// variables to hold and process information from the view using this class
weak var view: UIView?
var searchBarTopTags:SearchBarTopTagsViewController?
var amountToShiftBy:CGFloat!
var originalFrame:CGRect!
var previewController:PreviewController!
#objc func keyboardWillShow(notification: NSNotification) {
self.searchBarTopTags?.myViewBottomLayoutConstraint.constant = -self.getKeyboardHeight(notification as! Notification) + previewController.view.safeAreaInsets.bottom
UIView.animate(withDuration: 0, animations: {
self.view?.layoutIfNeeded()
self.searchBarTopTags?.myView.layoutIfNeeded()
})
}
#objc func keyboardWillHide(notification:NSNotification){
self.searchBarTopTags?.myViewBottomLayoutConstraint.constant = 0
UIView.animate(withDuration: 0, animations: {
self.view?.layoutIfNeeded()
self.searchBarTopTags?.myView.layoutIfNeeded()
})
}
func getKeyboardHeight(_ notification:Notification) -> CGFloat {
// get exact height of keyboard on all devices and convert to float value to return for use
let userInfo = notification.userInfo
let keyboardSize = userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue
return keyboardSize.cgRectValue.height
}
func subscribeToKeyboardNotifications(view: UIView) {
// assigning view to class' counterpart
self.view = view
// when UIKeyboardWillShow do keyboardWillShow function
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
}
func subscribeToKeyboardNotifications(view: UIView, previewController:PreviewController? = nil) {
// assigning view to class' counterpart
self.view = view
self.searchBarTopTags = previewController?.searchBarTopTags
self.previewController = previewController
// when UIKeyboardWillShow do keyboardWillShow function
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: .UIKeyboardWillHide, object: nil)
}
func unsubscribeFromKeyboardNotifications() {
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide, object: nil)
}
}
ORIGINAL CODE:
import UIKit
import Foundation
extension UIView {
func currentFirstResponder() -> UIResponder? {
if self.isFirstResponder {
return self
}
for view in self.subviews {
if let responder = view.currentFirstResponder() {
return responder
}
}
return nil
}
}
extension Notification.Name{
static let showKeyboard = Notification.Name("showKeyboard")
}
class KeyboardSlider: NSObject {
// variables to hold and process information from the view using this class
weak var view: UIView?
var searchBarTopTags:SearchBarTopTagsViewController?
var amountToShiftBy:CGFloat!
var originalFrame:CGRect!
#objc func keyboardWillShow(notification: NSNotification) {
self.originalFrame = self.searchBarTopTags?.myView.frame
self.amountToShiftBy = (self.searchBarTopTags?.view.frame.maxY)! - self.getKeyboardHeight(notification as! Notification) - (self.searchBarTopTags?.myView.frame.height)!
self.amountToShiftBy = (searchBarTopTags?.view.bounds.height)! - self.getKeyboardHeight(notification as! Notification) - (searchBarTopTags?.myView.bounds.height)!
self.searchBarTopTags?.myView.bottomAnchor.constraint(equalTo: (self.searchBarTopTags?.view.bottomAnchor)!, constant: -self.amountToShiftBy).isActive = true
UIView.animate(withDuration: 0, animations: {
self.view?.layoutIfNeeded()
self.searchBarTopTags?.view.layoutIfNeeded()
self.searchBarTopTags?.myView.layoutIfNeeded() })
}
#objc func keyboardWillHide(notification:NSNotification){
self.searchBarTopTags?.myView.bottomAnchor.constraint(equalTo: (self.searchBarTopTags?.view.bottomAnchor)!, constant: 0).isActive = true
UIView.animate(withDuration: 0, animations: {
self.view?.layoutIfNeeded()
self.searchBarTopTags?.view.layoutIfNeeded()
self.searchBarTopTags?.myView.layoutIfNeeded()
})
}
func getKeyboardHeight(_ notification:Notification) -> CGFloat {
// get exact height of keyboard on all devices and convert to float value to return for use
let userInfo = notification.userInfo
let keyboardSize = userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue
return keyboardSize.cgRectValue.height
}
func subscribeToKeyboardNotifications(view: UIView) {
// assigning view to class' counterpart
self.view = view
// when UIKeyboardWillShow do keyboardWillShow function
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
}
func subscribeToKeyboardNotifications(view: UIView, seachBarTopTagsVC:SearchBarTopTagsViewController? = nil) {
// assigning view to class' counterpart
self.view = view
self.searchBarTopTags = seachBarTopTagsVC
// when UIKeyboardWillShow do keyboardWillShow function
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: .UIKeyboardWillHide, object: nil)
}
func unsubscribeFromKeyboardNotifications() {
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide, object: nil)
}
}
Inside keyboardWillShow there is
self.searchBarTopTags?.myView.bottomAnchor.constraint(equalTo: (self.searchBarTopTags?.view.bottomAnchor)!, constant: -self.amountToShiftBy).isActive = true
And inside keyboardWillHide
self.searchBarTopTags?.myView.bottomAnchor.constraint(equalTo: (self.searchBarTopTags?.view.bottomAnchor)!, constant: 0).isActive = true
which off course will cause a conflict as the keyboard hides/shows , you need to create the bottom constraint only once say in viewDidLoad , then play with the constant value inside those methods , like this
var bottomConstraint:NSLayoutConstraint!
//
bottomConstraint = self.searchBarTopTags?.myView.bottomAnchor.constraint(equalTo: (self.searchBarTopTags?.view.bottomAnchor)!, constant: 0)
bottomConstraint.isActive = true
//
#objc func keyboardWillShow(notification: NSNotification) {
// other code
bottomConstraint.constant = -self.amountToShiftBy
}
#objc func keyboardWillHide(notification: NSNotification) {
bottomConstraint.constant = 0
// other code
}
Each time you call the following line, a new constraint will be added:
self.searchBarTopTags?.myView.bottomAnchor.constraint(equalTo: (self.searchBarTopTags?.view.bottomAnchor)!, constant: -self.amountToShiftBy).isActive = true
You need to add a reference to the constraint and just change its constant.
let constraint = self.searchBarTopTags?.myView.bottomAnchor.constraint...
contraint.constant = ...
I know there are a few posted questions on this topic, but none of them worked. I have a tableview and under it there's a UIView that contains a textfield and button. When my keyboard appears, it covers the whole UIView, making me unable to click "Send". The image to show how my app looks like :
at the moment, my codes are:
override func viewDidLoad() {
super.viewDidLoad()
inputTextField.delegate = self
inputTextField.layer.cornerRadius = 5
inputTextField.clipsToBounds = true
sendButton.layer.cornerRadius = 5
sendButton.clipsToBounds = true
self.tableView.register(UINib(nibName: "TableViewCell", bundle: nil), forCellReuseIdentifier: "TableViewCell")
loadMsg()
self.hideKeyboardWhenTappedAround()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
inputTextField.becomeFirstResponder()
}
How should I move the UIView up along with the textfield and button that is contained by the UIView when my keyboard appears?
Just add this library into your project using POD and thats it. It will automatically do it. You have not to do anything else.
Add pod like that
pod 'IQKeyboardManagerSwift'
In AppDelegate.swift, just import IQKeyboardManagerSwift framework and enable IQKeyboardManager.
import IQKeyboardManagerSwift
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
IQKeyboardManager.shared.enable = true
return true
}
}
For reference please have a look on this url, https://github.com/hackiftekhar/IQKeyboardManager
Here is solution, Create bottom layout constraint reference of send button view
#IBOutlet weak var bottomConstraint: NSLayoutConstraint!
#IBOutlet weak var sendbuttonView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(handleKeyboardNotification), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(handleKeyboardNotification), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
NotificationCenter.default.removeObserver(self)
}
#objc func handleKeyboardNotification(_ notification: Notification) {
if let userInfo = notification.userInfo {
let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as AnyObject).cgRectValue
let isKeyboardShowing = notification.name == NSNotification.Name.UIKeyboardWillShow
bottomConstraint?.constant = isKeyboardShowing ? -keyboardFrame!.height : 0
UIView.animate(withDuration: 0.5, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
}
Demo example
Swift 4.2
in viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboard(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboard(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboard(notification:)), name:UIResponder.keyboardWillChangeFrameNotification, object: nil)
and Method
#objc func keyboard(notification:Notification) {
guard let keyboardReact = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else{
return
}
if notification.name == UIResponder.keyboardWillShowNotification || notification.name == UIResponder.keyboardWillChangeFrameNotification {
self.view.frame.origin.y = -keyboardReact.height
}else{
self.view.frame.origin.y = 0
}
}
Try the following code
//Declare a delegate, assign your textField to the delegate and then include these methods
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
return YES;
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
[self.view endEditing:YES];
return YES;
}
- (void)keyboardDidShow:(NSNotification *)notification
{
// Assign new frame to your view
[self.view setFrame:CGRectMake(0,-110,320,460)]; //here taken -110 for example i.e. your view will be scrolled to -110. change its value according to your requirement.
}
-(void)keyboardDidHide:(NSNotification *)notification
{
[self.view setFrame:CGRectMake(0,0,320,460)];
}
You can do it by move View up with constraint here actionBarPaddingBottomConstranit is Constraint connect to your Input View Bottom constraint Check image
In ViewDidload :
override func viewDidLoad() {
super.viewDidLoad()
self.keybordControl()
}
Extension :
extension ViewController{
func keybordControl(){
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
#objc func keyboardWillShow(notification: Notification) {
self.keyboardControl(notification, isShowing: true)
}
#objc func keyboardWillHide(notification: Notification) {
self.keyboardControl(notification, isShowing: false)
}
private func keyboardControl(_ notification: Notification, isShowing: Bool) {
/* Handle the Keyboard property of Default, Text*/
var userInfo = notification.userInfo!
let keyboardRect = (userInfo[UIKeyboardFrameEndUserInfoKey]! as AnyObject).cgRectValue
let curve = (userInfo[UIKeyboardAnimationCurveUserInfoKey]! as AnyObject).uint32Value
let convertedFrame = self.view.convert(keyboardRect!, from: nil)
let heightOffset = self.view.bounds.size.height - convertedFrame.origin.y
let options = UIViewAnimationOptions(rawValue: UInt(curve!) << 16 | UIViewAnimationOptions.beginFromCurrentState.rawValue)
let duration = (userInfo[UIKeyboardAnimationDurationUserInfoKey]! as AnyObject).doubleValue
var pureheightOffset : CGFloat = -heightOffset
if isShowing {
if #available(iOS 11.0, *) {
pureheightOffset = pureheightOffset + view.safeAreaInsets.bottom
}
}
self.actionBarPaddingBottomConstranit?.update(offset:pureheightOffset)
UIView.animate(
withDuration: duration!,
delay: 0,
options: options,
animations: {
self.view.layoutIfNeeded()
},
completion: { bool in
})
}
}
Call below method in ViewDidLoad:
func keyboardSettings(){
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardNotification(notification:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
self.view.addGestureRecognizer(UITapGestureRecognizer(target: self.view, action: #selector(UIView.endEditing(_:))))
let swipeDown = UISwipeGestureRecognizer(target: self.view , action : #selector(UIView.endEditing(_:)))
swipeDown.direction = .down
self.view.addGestureRecognizer(swipeDown)
}
Then add below method for keyboard configuration:
#objc func keyboardNotification(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue{
if let duration:TimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue{
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIViewAnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
if (endFrame.origin.y) >= UIScreen.main.bounds.size.height {
self.const_ViewMessage_Bottom?.constant = 0.0
} else {
self.const_ViewMessage_Bottom?.constant = endFrame.size.height
}
UIView.animate(withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
}
}
self.const_ViewMessage_Bottom is bottom constraint of UIView with textfield.
with one extension to use in all ViewControllers. Create a empty swift file copy this code inside file
import UIKit
extension UIViewController {
func keyboardCheck() {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardSize.height
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
}
Then call the function inside ViewDidLoad Usage:
override func viewDidLoad() {
super.viewDidLoad()
self.keyboardCheck()
}
I'm using Swift for programing with iOS and I'm using this code to move the UITextField, but it does not work. I call the function keyboardWillShow correctly, but the textfield doesn't move. I'm using autolayout.
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self);
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
//let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
var frame = self.ChatField.frame
frame.origin.y = frame.origin.y - keyboardSize.height + 167
self.chatField.frame = frame
println("asdasd")
}
}
There are a couple of improvements to be made on the existing answers.
Firstly the UIKeyboardWillChangeFrameNotification is probably the best notification as it handles changes that aren't just show/hide but changes due to keyboard changes (language, using 3rd party keyboards etc.) and rotations too (but note comment below indicating the keyboard will hide should also be handled to support hardware keyboard connection).
Secondly the animation parameters can be pulled from the notification to ensure that animations are properly together.
There are probably options to clean up this code a bit more especially if you are comfortable with force unwrapping the dictionary code.
class MyViewController: UIViewController {
// This constraint ties an element at zero points from the bottom layout guide
#IBOutlet var keyboardHeightLayoutConstraint: NSLayoutConstraint?
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardNotification(notification:)),
name: UIResponder.keyboardWillChangeFrameNotification,
object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self)
}
#objc func keyboardNotification(notification: NSNotification) {
guard let userInfo = notification.userInfo else { return }
let endFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
let endFrameY = endFrame?.origin.y ?? 0
let duration:TimeInterval = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)
if endFrameY >= UIScreen.main.bounds.size.height {
self.keyboardHeightLayoutConstraint?.constant = 0.0
} else {
self.keyboardHeightLayoutConstraint?.constant = endFrame?.size.height ?? 0.0
}
UIView.animate(
withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
If you're using Auto Layout, I assume you've set the Bottom Space to Superview constraint. If that's the case, you simply have to update the constraint's value. Here's how you do it with a little bit of animation.
func keyboardWasShown(notification: NSNotification) {
let info = notification.userInfo!
let keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.bottomConstraint.constant = keyboardFrame.size.height + 20
})
}
The hardcoded 20 is added only to pop the textfield above the keyboard just a bit. Otherwise the keyboard's top margin and textfield's bottom margin would be touching.
When the keyboard is dismissed, reset the constraint's value to its original one.
A simple solution is to move view up with constant of keyboard height.
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
#objc func keyboardWillShow(sender: NSNotification) {
self.view.frame.origin.y = -150 // Move view 150 points upward
}
#objc func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y = 0 // Move view to original position
}
Swift 5:
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(sender:)), name: UIResponder.keyboardWillShowNotification, object: nil);
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(sender:)), name: UIResponder.keyboardWillHideNotification, object: nil);
For moving your view while editing textfield try this , I have applied this ,
Option 1 :- ** **Update in Swift 5.0 and iPhone X , XR , XS and XS Max
Move using NotificationCenter
Register this Notification in func viewWillAppear(_ animated: Bool)
Deregister this Notification in func viewWillDisappear(_ animated: Bool)
Note:- If you will not deregister than it will call from child class and will reason of crashing or else.
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver( self, selector: #selector(keyboardWillShow(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil )
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
}
#objc func keyboardWillShow( notification: Notification) {
if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
var newHeight: CGFloat
let duration:TimeInterval = (notification.userInfo![UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = notification.userInfo![UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)
if #available(iOS 11.0, *) {
newHeight = keyboardFrame.cgRectValue.height - self.view.safeAreaInsets.bottom
} else {
newHeight = keyboardFrame.cgRectValue.height
}
let keyboardHeight = newHeight + 10 // **10 is bottom margin of View** and **this newHeight will be keyboard height**
UIView.animate(withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: {
self.view.textViewBottomConstraint.constant = keyboardHeight **//Here you can manage your view constraints for animated show**
self.view.layoutIfNeeded() },
completion: nil)
}
}
Option 2 :-
Its work fine
func textFieldDidBeginEditing(textField: UITextField) {
self.animateViewMoving(up: true, moveValue: 100)
}
func textFieldDidEndEditing(textField: UITextField) {
self.animateViewMoving(up: false, moveValue: 100)
}
func animateViewMoving (up:Bool, moveValue :CGFloat){
var movementDuration:NSTimeInterval = 0.3
var movement:CGFloat = ( up ? -moveValue : moveValue)
UIView.beginAnimations( "animateView", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration )
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
UIView.commitAnimations()
}
I got this answer from this source UITextField move up when keyboard appears in Swift
IN the Swift 4 ---
func textFieldDidBeginEditing(_ textField: UITextField) {
animateViewMoving(up: true, moveValue: 100)
}
func textFieldDidEndEditing(_ textField: UITextField) {
animateViewMoving(up: false, moveValue: 100)
}
func animateViewMoving (up:Bool, moveValue :CGFloat){
let movementDuration:TimeInterval = 0.3
let movement:CGFloat = ( up ? -moveValue : moveValue)
UIView.beginAnimations( "animateView", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration )
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
UIView.commitAnimations()
}
I love clean Swift code. So here's the tightest code I could come up with to move a text view up/down with the keyboard. It's currently working in an iOS8/9 Swift 2 production app.
UPDATE (March 2016):
I just tightened up my previous code as much as possible. Also, there are a bunch of popular answers here that hardcode the keyboard height and animation parameters. There's no need for that, not to mention that the numbers in these answers don't always line up with the actual values I'm seeing on my 6s+ iOS9 (keyboard height of 226, duration of 0.25, and animation curve of 7). In any case, it's almost no extra code to get those values straight from the system. See below.
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "animateWithKeyboard:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "animateWithKeyboard:", name: UIKeyboardWillHideNotification, object: nil)
}
func animateWithKeyboard(notification: NSNotification) {
// Based on both Apple's docs and personal experience,
// I assume userInfo and its documented keys are available.
// If you'd like, you can remove the forced unwrapping and add your own default values.
let userInfo = notification.userInfo!
let keyboardHeight = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue().height
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as! Double
let curve = userInfo[UIKeyboardAnimationCurveUserInfoKey] as! UInt
let moveUp = (notification.name == UIKeyboardWillShowNotification)
// baseContraint is your Auto Layout constraint that pins the
// text view to the bottom of the superview.
baseConstraint.constant = moveUp ? -keyboardHeight : 0
let options = UIViewAnimationOptions(rawValue: curve << 16)
UIView.animateWithDuration(duration, delay: 0, options: options,
animations: {
self.view.layoutIfNeeded()
},
completion: nil
)
}
NOTE: This code covers the most comment/general case. However, more code may be needed to handle different orientations and/or custom keyboards Here's an in-depth article on working with the iOS keyboard. If you need to handle every scenario, this may help.
Edit: I recommend an easier and cleaner solution. Just change the class of bottom spacing constraint to KeyboardLayoutConstraint. It will automatically expand to the keyboard height.
This is an improved version of #JosephLord 's answer.
As tested on iOS 8.3 iPad Simulator, Portrait. Xcode6.3 beta4, I found his answer doesn't work when keyboard is hiding because UIKeyboardFrameEndUserInfoKey is "NSRect: {{0, 1024}, {768, 264}}";. The height is never 0.
This goes back to use the traditional UIKeyboardWillShowNotification and UIKeyboardWillHideNotification to better tell when keyboard is hiding rather than relying on the end frame's height. UIKeyboardWillShowNotification is also sent when keyboard frame is changed so it should cover all use cases.
// You have to set this up in storyboard first!.
// It's a vertical spacing constraint between view and bottom of superview.
#IBOutlet weak var bottomSpacingConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardNotification:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardNotification:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardNotification(notification: NSNotification) {
let isShowing = notification.name == UIKeyboardWillShowNotification
if let userInfo = notification.userInfo {
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
let endFrameHeight = endFrame?.size.height ?? 0.0
let duration:NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
self.bottomSpacingConstraint?.constant = isShowing ? endFrameHeight : 0.0
UIView.animateWithDuration(duration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
i am working with swift 4 and i am solved this issue without use any extra bottom constraint look my code is here.its really working on my case
1) Add Notification Observer in did load
override func viewDidLoad() {
super.viewDidLoad()
setupManager()
// Do any additional setup after loading the view.
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
2) Remove Notification Observer like
deinit {
NotificationCenter.default.removeObserver(self)
}
3) Add keyboard show/ hide methods like
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.frame.origin.y -= keyboardSize.height
self.view.layoutIfNeeded()
})
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.frame.origin.y += keyboardSize.height
self.view.layoutIfNeeded()
})
}
}
4) Add textfeild delegate and add touchesBegan methods .usefull for hide the keyboard when touch outside the textfeild on screen
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
view.endEditing(true)
}
You can use this library and just one line of code in appDidFinishedLaunching and u are done..
func application(application: UIApplication,didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
IQKeyboardManager.sharedManager().enable = true
return true
}
IQKeyboardManager - adjust view whenever keyboard appear
link - https://github.com/hackiftekhar/IQKeyboardManager
This is an improved version of #JosephLord and #Hlung's answer.
It can apply whether you have tabbar or not.
And it would perfectly restore view that is moved by keyboard to original position.
// You have to set this up in storyboard first!.
// It's a vertical spacing constraint between view and bottom of superview.
#IBOutlet weak var bottomSpacingConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
// Receive(Get) Notification
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardNotification:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardNotification:", name: UIKeyboardWillHideNotification, object: nil)
self.originalConstraint = self.keyboardHeightLayoutConstraint?.constant //for original coordinate.
}
func keyboardNotification(notification: NSNotification) {
let isShowing = notification.name == UIKeyboardWillShowNotification
var tabbarHeight: CGFloat = 0
if self.tabBarController? != nil {
tabbarHeight = self.tabBarController!.tabBar.frame.height
}
if let userInfo = notification.userInfo {
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
let duration:NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
self.keyboardHeightLayoutConstraint?.constant = isShowing ? (endFrame!.size.height - tabbarHeight) : self.originalConstraint!
UIView.animateWithDuration(duration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
I created a Swift 3 protocol to handle the keyboard appearance / disappearance
import UIKit
protocol KeyboardHandler: class {
var bottomConstraint: NSLayoutConstraint! { get set }
func keyboardWillShow(_ notification: Notification)
func keyboardWillHide(_ notification: Notification)
func startObservingKeyboardChanges()
func stopObservingKeyboardChanges()
}
extension KeyboardHandler where Self: UIViewController {
func startObservingKeyboardChanges() {
// NotificationCenter observers
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillShow, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with rotations
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with keyboard change (emoji, numerical, etc.)
NotificationCenter.default.addObserver(forName: NSNotification.Name.UITextInputCurrentInputModeDidChange, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillHide, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillHide(notification)
}
}
func keyboardWillShow(_ notification: Notification) {
let verticalPadding: CGFloat = 20 // Padding between the bottom of the view and the top of the keyboard
guard let value = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return }
let keyboardHeight = value.cgRectValue.height
// Here you could have more complex rules, like checking if the textField currently selected is actually covered by the keyboard, but that's out of this scope.
self.bottomConstraint.constant = keyboardHeight + verticalPadding
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func keyboardWillHide(_ notification: Notification) {
self.bottomConstraint.constant = 0
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func stopObservingKeyboardChanges() {
NotificationCenter.default.removeObserver(self)
}
}
Then, to implement it in a UIViewController, do the following:
let the viewController conform to this protocol :
class FormMailVC: UIViewControlle, KeyboardHandler {
start observing keyboard changes in viewWillAppear:
// MARK: - View controller life cycle
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
startObservingKeyboardChanges()
}
stop observing keyboard changes in viewWillDisappear:
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
stopObservingKeyboardChanges()
}
create an IBOutlet for the bottom constraint from the storyboard:
// NSLayoutConstraints
#IBOutlet weak var bottomConstraint: NSLayoutConstraint!
(I recommend having all of your UI embedded inside a "contentView", and linking to this property the bottom constraint from this contentView to the bottom layout guide)
change the constraint priority of the top constraint to 250 (low)
This is to let the whole content view slide upwards when the keyboard appears.
The priority must be lower than any other constraint priority in the subviews, including content hugging priorities / content compression resistance priorities.
Make sure that your Autolayout has enough constraints to determine how the contentView should slide up.
You may have to add a "greater than equal" constraint for this:
And here you go!
Complete code for managing keyboard.
override func viewWillAppear(_ animated: Bool) {
NotificationCenter.default.addObserver(self, selector: #selector(StoryMediaVC.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(StoryMediaVC.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
guard let userInfo = notification.userInfo else {return}
guard let keyboardSize = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else {return}
let keyboardFrame = keyboardSize.cgRectValue
if self.view.bounds.origin.y == 0{
self.view.bounds.origin.y += keyboardFrame.height
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.view.bounds.origin.y != 0 {
self.view.bounds.origin.y = 0
}
}
Easiest way that doesn't require any code:
Download KeyboardLayoutConstraint.swift and add (drag & drop) the file into your project, if you're not using the Spring animation framework already.
In your storyboard, create a bottom constraint for the object/view/textfield, select the constraint (double-click it) and in the Identity Inspector, change its class from NSLayoutConstraint to KeyboardLayoutConstraint.
Done!
The object will auto-move up with the keyboard, in sync.
Such simple UIViewController extension can be used
//MARK: - Observers
extension UIViewController {
func addObserverForNotification(notificationName: String, actionBlock: (NSNotification) -> Void) {
NSNotificationCenter.defaultCenter().addObserverForName(notificationName, object: nil, queue: NSOperationQueue.mainQueue(), usingBlock: actionBlock)
}
func removeObserver(observer: AnyObject, notificationName: String) {
NSNotificationCenter.defaultCenter().removeObserver(observer, name: notificationName, object: nil)
}
}
//MARK: - Keyboard observers
extension UIViewController {
typealias KeyboardHeightClosure = (CGFloat) -> ()
func addKeyboardChangeFrameObserver(willShow willShowClosure: KeyboardHeightClosure?,
willHide willHideClosure: KeyboardHeightClosure?) {
NSNotificationCenter.defaultCenter().addObserverForName(UIKeyboardWillChangeFrameNotification,
object: nil, queue: NSOperationQueue.mainQueue(), usingBlock: { [weak self](notification) in
if let userInfo = notification.userInfo,
let frame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue(),
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Double,
let c = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? UInt,
let kFrame = self?.view.convertRect(frame, fromView: nil),
let kBounds = self?.view.bounds {
let animationType = UIViewAnimationOptions(rawValue: c)
let kHeight = kFrame.size.height
UIView.animateWithDuration(duration, delay: 0, options: animationType, animations: {
if CGRectIntersectsRect(kBounds, kFrame) { // keyboard will be shown
willShowClosure?(kHeight)
} else { // keyboard will be hidden
willHideClosure?(kHeight)
}
}, completion: nil)
} else {
print("Invalid conditions for UIKeyboardWillChangeFrameNotification")
}
})
}
func removeKeyboardObserver() {
removeObserver(self, notificationName: UIKeyboardWillChangeFrameNotification)
}
}
Example of usage
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
removeKeyboardObserver()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
addKeyboardChangeFrameObserver(willShow: { [weak self](height) in
//Update constraints here
self?.view.setNeedsUpdateConstraints()
}, willHide: { [weak self](height) in
//Reset constraints here
self?.view.setNeedsUpdateConstraints()
})
}
Swift 4 solution
//MARK: - Observers
extension UIViewController {
func addObserverForNotification(_ notificationName: Notification.Name, actionBlock: #escaping (Notification) -> Void) {
NotificationCenter.default.addObserver(forName: notificationName, object: nil, queue: OperationQueue.main, using: actionBlock)
}
func removeObserver(_ observer: AnyObject, notificationName: Notification.Name) {
NotificationCenter.default.removeObserver(observer, name: notificationName, object: nil)
}
}
//MARK: - Keyboard handling
extension UIViewController {
typealias KeyboardHeightClosure = (CGFloat) -> ()
func addKeyboardChangeFrameObserver(willShow willShowClosure: KeyboardHeightClosure?,
willHide willHideClosure: KeyboardHeightClosure?) {
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil, queue: OperationQueue.main, using: { [weak self](notification) in
if let userInfo = notification.userInfo,
let frame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Double,
let c = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? UInt,
let kFrame = self?.view.convert(frame, from: nil),
let kBounds = self?.view.bounds {
let animationType = UIViewAnimationOptions(rawValue: c)
let kHeight = kFrame.size.height
UIView.animate(withDuration: duration, delay: 0, options: animationType, animations: {
if kBounds.intersects(kFrame) { // keyboard will be shown
willShowClosure?(kHeight)
} else { // keyboard will be hidden
willHideClosure?(kHeight)
}
}, completion: nil)
} else {
print("Invalid conditions for UIKeyboardWillChangeFrameNotification")
}
})
}
func removeKeyboardObserver() {
removeObserver(self, notificationName: NSNotification.Name.UIKeyboardWillChangeFrame)
}
}
Swift 4.2
//MARK: - Keyboard handling
extension UIViewController {
func addObserverForNotification(_ notificationName: Notification.Name, actionBlock: #escaping (Notification) -> Void) {
NotificationCenter.default.addObserver(forName: notificationName, object: nil, queue: OperationQueue.main, using: actionBlock)
}
func removeObserver(_ observer: AnyObject, notificationName: Notification.Name) {
NotificationCenter.default.removeObserver(observer, name: notificationName, object: nil)
}
typealias KeyboardHeightClosure = (CGFloat) -> ()
func removeKeyboardObserver() {
removeObserver(self, notificationName: UIResponder.keyboardWillChangeFrameNotification)
}
func addKeyboardChangeFrameObserver(willShow willShowClosure: KeyboardHeightClosure?,
willHide willHideClosure: KeyboardHeightClosure?) {
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillChangeFrameNotification,
object: nil, queue: OperationQueue.main, using: { [weak self](notification) in
if let userInfo = notification.userInfo,
let frame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
let duration = userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double,
let c = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? UInt,
let kFrame = self?.view.convert(frame, from: nil),
let kBounds = self?.view.bounds {
let animationType = UIView.AnimationOptions(rawValue: c)
let kHeight = kFrame.size.height
UIView.animate(withDuration: duration, delay: 0, options: animationType, animations: {
if kBounds.intersects(kFrame) { // keyboard will be shown
willShowClosure?(kHeight)
} else { // keyboard will be hidden
willHideClosure?(kHeight)
}
}, completion: nil)
} else {
print("Invalid conditions for UIKeyboardWillChangeFrameNotification")
}
})
}
}
A Swift 5 solution for frédéric-adda :
protocol KeyboardHandler: class {
var bottomConstraint: NSLayoutConstraint! { get set }
func keyboardWillShow(_ notification: Notification)
func keyboardWillHide(_ notification: Notification)
func startObservingKeyboardChanges()
func stopObservingKeyboardChanges()
}
extension KeyboardHandler where Self: UIViewController {
func startObservingKeyboardChanges() {
// NotificationCenter observers
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with rotations
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillChangeFrameNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with keyboard change (emoji, numerical, etc.)
NotificationCenter.default.addObserver(forName: UITextInputMode.currentInputModeDidChangeNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillHideNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillHide(notification)
}
}
func keyboardWillShow(_ notification: Notification) {
let verticalPadding: CGFloat = 20 // Padding between the bottom of the view and the top of the keyboard
guard let value = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
let keyboardHeight = value.cgRectValue.height
// Here you could have more complex rules, like checking if the textField currently selected is actually covered by the keyboard, but that's out of this scope.
self.bottomConstraint.constant = keyboardHeight + verticalPadding
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func keyboardWillHide(_ notification: Notification) {
self.bottomConstraint.constant = 0
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func stopObservingKeyboardChanges() {
NotificationCenter.default.removeObserver(self)
}
}
In any UIViewController:
Conform to KeyboardHandler protocol
extension AnyViewController: KeyboardHandler {}
Add bottom constraint for the last-bottom element on the screen.
#IBOutlet var bottomConstraint: NSLayoutConstraint!
Add Observer subscribe/unsubscribe:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
startObservingKeyboardChanges()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
stopObservingKeyboardChanges()
}
Enjoy!
struct MoveKeyboard {
static let KEYBOARD_ANIMATION_DURATION : CGFloat = 0.3
static let MINIMUM_SCROLL_FRACTION : CGFloat = 0.2;
static let MAXIMUM_SCROLL_FRACTION : CGFloat = 0.8;
static let PORTRAIT_KEYBOARD_HEIGHT : CGFloat = 216;
static let LANDSCAPE_KEYBOARD_HEIGHT : CGFloat = 162;
}
func textFieldDidBeginEditing(textField: UITextField) {
let textFieldRect : CGRect = self.view.window!.convertRect(textField.bounds, fromView: textField)
let viewRect : CGRect = self.view.window!.convertRect(self.view.bounds, fromView: self.view)
let midline : CGFloat = textFieldRect.origin.y + 0.5 * textFieldRect.size.height
let numerator : CGFloat = midline - viewRect.origin.y - MoveKeyboard.MINIMUM_SCROLL_FRACTION * viewRect.size.height
let denominator : CGFloat = (MoveKeyboard.MAXIMUM_SCROLL_FRACTION - MoveKeyboard.MINIMUM_SCROLL_FRACTION) * viewRect.size.height
var heightFraction : CGFloat = numerator / denominator
if heightFraction < 0.0 {
heightFraction = 0.0
} else if heightFraction > 1.0 {
heightFraction = 1.0
}
let orientation : UIInterfaceOrientation = UIApplication.sharedApplication().statusBarOrientation
if (orientation == UIInterfaceOrientation.Portrait || orientation == UIInterfaceOrientation.PortraitUpsideDown) {
animateDistance = floor(MoveKeyboard.PORTRAIT_KEYBOARD_HEIGHT * heightFraction)
} else {
animateDistance = floor(MoveKeyboard.LANDSCAPE_KEYBOARD_HEIGHT * heightFraction)
}
var viewFrame : CGRect = self.view.frame
viewFrame.origin.y -= animateDistance
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(NSTimeInterval(MoveKeyboard.KEYBOARD_ANIMATION_DURATION))
self.view.frame = viewFrame
UIView.commitAnimations()
}
func textFieldDidEndEditing(textField: UITextField) {
var viewFrame : CGRect = self.view.frame
viewFrame.origin.y += animateDistance
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(NSTimeInterval(MoveKeyboard.KEYBOARD_ANIMATION_DURATION))
self.view.frame = viewFrame
UIView.commitAnimations()
}
And Lastly since we are using delegates methods
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
refactored from using objective-c http://www.cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html
Another solution that doesn't depend on autolayout, constraints or any outlets. What you do need is your field(s) in a scrollview.
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "makeSpaceForKeyboard:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "makeSpaceForKeyboard:", name: UIKeyboardWillHideNotification, object: nil)
}
func makeSpaceForKeyboard(notification: NSNotification) {
let info = notification.userInfo!
let keyboardHeight:CGFloat = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue().size.height
let duration:Double = info[UIKeyboardAnimationDurationUserInfoKey] as! Double
if notification.name == UIKeyboardWillShowNotification {
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height - keyboardHeight
self.view.frame = frame
})
} else {
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height + keyboardHeight
self.view.frame = frame
})
}
}
Here is my version for a solution for Swift 2.2:
First register for Keyboard Show/Hide Notifications
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(MessageThreadVC.keyboardWillShow(_:)),
name: UIKeyboardWillShowNotification,
object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(MessageThreadVC.keyboardWillHide(_:)),
name: UIKeyboardWillHideNotification,
object: nil)
Then in methods coresponding for those notifications move the main view up or down
func keyboardWillShow(sender: NSNotification) {
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y = -keyboardSize.height
}
}
func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y = 0
}
The trick is in the "keyboardWillShow" part which get calls every time "QuickType Suggestion Bar" is expanded or collapsed. Then we always set the y coordinate of the main view which equals the negative value of total keyboard height (with or without the "QuickType bar" portion).
At the end do not forget to remove observers
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
Very Simple and no need to code more.
Just add pod 'IQKeyboardManagerSwift' in your podfile, and in your AppDelegate page add code below.
import IQKeyboardManagerSwift
and in method didFinishLaunchingWithOptions() type
IQKeyboardManager.shared.enable = true
that is it.
check this video link for better understanding https://youtu.be/eOM94K1ZWN8
Hope this will help you.
The following is a simple solution, whereby the text field has a constraint tying it to the bottom layout guide. It simply adds the keyboard height to the constraint's constant.
// This constraint ties the text field to the bottom layout guide
#IBOutlet var textFieldToBottomLayoutGuideConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name:UIKeyboardWillHideNotification, object: nil);
}
func keyboardWillShow(sender: NSNotification) {
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.textFieldToBottomLayoutGuideConstraint?.constant += keyboardSize.height
}
}
func keyboardWillHide(sender: NSNotification) {
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.textFieldToBottomLayoutGuideConstraint?.constant -= keyboardSize.height
}
}
Well, I think i might be too late but i found another simple version of Saqib's answer. I'm using Autolayout with constraints. I have a small view inside of another main view with username and password fields. Instead of changing the y coordinate of the view i'm saving the original constraint value in a variable and changing the constraint's constant to some value and again after the keyboard dismisses, i'm setting up the constraint to original one. This way it avoids the problem Saqib's answer has, (The view keeps on moving up and does not stop). Below is my code...
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
self.originalConstraint = self.centerYConstraint.constant
}
func keyboardWillShow(sender: NSNotification) {
self.centerYConstraint.constant += 30
}
func keyboardWillHide(sender: NSNotification) {
self.centerYConstraint.constant = self.originalConstraint
}
Swift 4.x answer, merging answers from #Joseph Lord and #Isuru. bottomConstraint represents the bottom constraint of the view you're interested in moving.
override func viewDidLoad() {
// Call super
super.viewDidLoad()
// Subscribe to keyboard notifications
NotificationCenter.default.addObserver(self,
selector: #selector(keyboardNotification(notification:)),
name: UIResponder.keyboardWillChangeFrameNotification,
object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self)
}
#objc func keyboardNotification(notification: NSNotification) {
if let userInfo = notification.userInfo {
// Get keyboard frame
let keyboardFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
// Set new bottom constraint constant
let bottomConstraintConstant = keyboardFrame.origin.y >= UIScreen.main.bounds.size.height ? 0.0 : keyboardFrame.size.height
// Set animation properties
let duration = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve = UIView.AnimationOptions(rawValue: animationCurveRaw)
// Animate the view you care about
UIView.animate(withDuration: duration, delay: 0, options: animationCurve, animations: {
self.bottomConstraint.constant = bottomConstraintConstant
self.view.layoutIfNeeded()
}, completion: nil)
}
}
I have done by following manner:
This is useful when textfield superview is view
class AdminLoginViewController: UIViewController,
UITextFieldDelegate{
#IBOutlet weak var txtUserName: UITextField!
#IBOutlet weak var txtUserPassword: UITextField!
#IBOutlet weak var btnAdminLogin: UIButton!
private var activeField : UIView?
var param:String!
var adminUser : Admin? = nil
var kbHeight: CGFloat!
override func viewDidLoad()
{
self.addKeyBoardObserver()
self.addGestureForHideKeyBoard()
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func addGestureForHideKeyBoard()
{
let tapGesture = UITapGestureRecognizer(target: self, action: Selector("hideKeyboard"))
tapGesture.cancelsTouchesInView = false
view.addGestureRecognizer(tapGesture)
}
func hideKeyboard() {
self.view.endEditing(true)
}
func addKeyBoardObserver(){
NSNotificationCenter.defaultCenter().addObserver(self, selector: "willChangeKeyboardFrame:",
name:UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "willChangeKeyboardFrame:",
name:UIKeyboardWillHideNotification, object: nil)
}
func removeObserver(){
NSNotificationCenter.defaultCenter().removeObserver(self)
}
//MARK:- textfiled Delegate
func textFieldShouldBeginEditing(textField: UITextField) -> Bool
{
activeField = textField
return true
}
func textFieldShouldEndEditing(textField: UITextField) -> Bool
{
if activeField == textField
{
activeField = nil
}
return true
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
if txtUserName == textField
{
txtUserPassword.becomeFirstResponder()
}
else if (textField == txtUserPassword)
{
self.btnAdminLoginAction(nil)
}
return true;
}
func willChangeKeyboardFrame(aNotification : NSNotification)
{
if self.activeField != nil && self.activeField!.isFirstResponder()
{
if let keyboardSize = (aNotification.userInfo![UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue()
{
let dy = (self.activeField?.superview?.convertRect((self.activeField?.frame)!, toView: view).origin.y)!
let height = (self.view.frame.size.height - keyboardSize.size.height)
if dy > height
{
var frame = self.view.frame
frame.origin.y = -((dy - height) + (self.activeField?.frame.size.height)! + 20)
self.view.frame = frame
}
}
}
else
{
var frame = self.view.frame
frame.origin.y = 0
self.view.frame = frame
}
} }
func registerForKeyboardNotifications(){
//Keyboard
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWasShown), name: UIKeyboardDidShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWillBeHidden), name: UIKeyboardDidHideNotification, object: nil)
}
func deregisterFromKeyboardNotifications(){
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardWasShown(notification: NSNotification){
let userInfo: NSDictionary = notification.userInfo!
let keyboardInfoFrame = userInfo.objectForKey(UIKeyboardFrameEndUserInfoKey)?.CGRectValue()
let windowFrame:CGRect = (UIApplication.sharedApplication().keyWindow!.convertRect(self.view.frame, fromView:self.view))
let keyboardFrame = CGRectIntersection(windowFrame, keyboardInfoFrame!)
let coveredFrame = UIApplication.sharedApplication().keyWindow!.convertRect(keyboardFrame, toView:self.view)
let contentInsets = UIEdgeInsetsMake(0, 0, (coveredFrame.size.height), 0.0)
self.scrollViewInAddCase .contentInset = contentInsets;
self.scrollViewInAddCase.scrollIndicatorInsets = contentInsets;
self.scrollViewInAddCase.contentSize = CGSizeMake((self.scrollViewInAddCase.contentSize.width), (self.scrollViewInAddCase.contentSize.height))
}
/**
this method will fire when keyboard was hidden
- parameter notification: contains keyboard details
*/
func keyboardWillBeHidden (notification: NSNotification) {
self.scrollViewInAddCase.contentInset = UIEdgeInsetsZero
self.scrollViewInAddCase.scrollIndicatorInsets = UIEdgeInsetsZero
}
For anyone not using storyboards to set the layout constraint. This is a pure programmatic way to get it working on Swift 5:
Define an empty constraint in your viewController. In this case, I am building a chat app that has a UIView containing text view at the very bottom of the screen.
var discussionsMessageBoxBottomAnchor: NSLayoutConstraint = NSLayoutConstraint()
In viewDidLoad add the constraints for the bottom-most view. In this case discussionsMessageBox. Also, add the listener for keyboard events.
For correctly initializing the constraint, you need to first add the subview and then define the constraint.
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardNotification(notification:)),
name: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil)
view.addSubview(discussionsMessageBox)
if #available(iOS 11.0, *) {
discussionsMessageBoxBottomAnchor = discussionsMessageBox.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 0)
} else {
// Fallback on earlier versions
discussionsMessageBoxBottomAnchor = discussionsMessageBox.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0)
}
NSLayoutConstraint.activate([ discussionsMessageBoxBottomAnchor ])
Define deinit.
deinit {
NotificationCenter.default.removeObserver(self)
}
Next add the code that #JosephLord defined, with one correction to fix offset math.
extension DiscussionsViewController {
#objc func keyboardNotification(notification: NSNotification) {
guard let userInfo = notification.userInfo else { return }
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
let endFrameY = endFrame?.origin.y ?? 0
let duration:TimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)
if endFrameY >= UIScreen.main.bounds.size.height {
self.discussionsMessageBoxBottomAnchor.constant = 0.0
} else {
//Changed line
self.discussionsMessageBoxBottomAnchor.constant = -1 * (endFrame?.size.height ?? 0.0)
}
UIView.animate(
withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
If you have more than one text field on the view, then I suggest that you look at this method. When switching between fields, you will not have a problem with the fact that the view runs away, it will simply adapt to the desired text field. It works in swift 5
override func viewDidLoad() {
super.viewDidLoad()
registerForKeyboardNotification()
}
All methods in extensions
extension StartViewController: UITextFieldDelegate {
func registerForKeyboardNotification() {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(sender:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(sender:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(sender: NSNotification) {
guard let userInfo = sender.userInfo,
let keyboardFrame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue,
let currentTextField = UIResponder.currentFirst() as? UITextField else { return }
let keyboardTopY = keyboardFrame.cgRectValue.origin.y
let convertedTextFieldFrame = view.convert(currentTextField.frame, from: currentTextField.superview)
let textFieldBottomY = convertedTextFieldFrame.origin.y + convertedTextFieldFrame.size.height
if textFieldBottomY > keyboardTopY {
let textBoxY = convertedTextFieldFrame.origin.y
let newFrameY = (textBoxY - keyboardTopY / 2) * -1
view.frame.origin.y = newFrameY
}
}
#objc func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y = 0
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
switch textField {
case emailTextField :
passwordTextField.becomeFirstResponder()
default:
emailTextField.becomeFirstResponder()
}
return true
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches , with:event)
view.endEditing(true)
}
}
At the end we set up the method with UIResponder
extension UIResponder {
private struct Static {
static weak var responder: UIResponder?
}
static func currentFirst() -> UIResponder? {
Static.responder = nil
UIApplication.shared.sendAction(#selector(UIResponder._trap), to: nil, from: nil, for: nil)
return Static.responder
}
#objc private func _trap() {
Static.responder = self
}
}
I have done in following manner :
class SignInController: UIViewController , UITextFieldDelegate {
#IBOutlet weak var scrollView: UIScrollView!
// outlet declartion
#IBOutlet weak var signInTextView: UITextField!
var kbHeight: CGFloat!
/**
*
* #method viewDidLoad
*
*/
override func viewDidLoad() {
super.viewDidLoad()
self.signInTextView.delegate = self
}// end viewDidLoad
/**
*
* #method viewWillAppear
*
*/
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}// end viewWillAppear
/**
*
* #method viewDidAppear
*
*/
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
}// end viewDidAppear
/**
*
* #method viewWillDisappear
*
*/
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self)
}
/**
*
* #method textFieldShouldReturn
* retun the keyboard value
*
*/
// MARK -
func textFieldShouldReturn(textField: UITextField) -> Bool {
signInTextView.resignFirstResponder()
return true;
}// end textFieldShouldReturn
// MARK - keyboardWillShow
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
kbHeight = keyboardSize.height
self.animateTextField(true)
}
}
}// end keyboardWillShow
// MARK - keyboardWillHide
func keyboardWillHide(notification: NSNotification) {
self.animateTextField(false)
}// end keyboardWillHide
// MARK - animateTextField
func animateTextField(up: Bool) {
var movement = (up ? -kbHeight : kbHeight)
UIView.animateWithDuration(0.3, animations: {
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
})
}// end animateTextField
/**
*
* #method didReceiveMemoryWarning
*
*/
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}// end didReceiveMemoryWarning
}// end SignInController
If you are like me who has tried all the above solutions and still your problem is not solved, I have a got a great solution for you that works like a charm. First I want clarify few things about some of solutions mentioned above.
In my case IQkeyboardmanager was working only when there is no auto layout applied on the elements, if it is applied then IQkeyboard manager will not work the way we think.
Same thing with upward movement of self.view.
i have wriiten a objective c header with a swift support for pushing UITexfield upward when user clicks on it, solving the problem of keyboard covering the UITextfield : https://github.com/coolvasanth/smart_keyboard.
One who has An intermediate or higher level in iOS app development can easily understand the repository and implement it. All the best
Here is a generic solution for all TextField
Steps -
1) Create a common ViewController that is extended by other ViewControllers
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= getMoveableDistance(keyboarHeight: keyboardSize.height)
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
deinit {
NotificationCenter.default.removeObserver(self)
}
//get the distance to move up the main view for the focus textfiled
func getMoveableDistance(keyboarHeight : CGFloat) -> CGFloat{
var y:CGFloat = 0.0
if let activeTF = getSelectedTextField(){
var tfMaxY = activeTF.frame.maxY
var containerView = activeTF.superview!
while containerView.frame.maxY != self.view.frame.maxY{
let contViewFrm = containerView.convert(activeTF.frame, to: containerView.superview)
tfMaxY = tfMaxY + contViewFrm.minY
containerView = containerView.superview!
}
let keyboardMinY = self.view.frame.height - keyboarHeight
if tfMaxY > keyboardMinY{
y = (tfMaxY - keyboardMinY) + 10.0
}
}
return y
}
2) Create a extension of UIViewController and the currently active TextField
//get active text field
extension UIViewController {
func getSelectedTextField() -> UITextField? {
let totalTextFields = getTextFieldsInView(view: self.view)
for textField in totalTextFields{
if textField.isFirstResponder{
return textField
}
}
return nil
}
func getTextFieldsInView(view: UIView) -> [UITextField] {
var totalTextFields = [UITextField]()
for subview in view.subviews as [UIView] {
if let textField = subview as? UITextField {
totalTextFields += [textField]
} else {
totalTextFields += getTextFieldsInView(view: subview)
}
}
return totalTextFields
}
}
I modified #Simpa solution a little bit.........
override func viewDidLoad()
{
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("makeSpaceForKeyboard:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("makeSpaceForKeyboard:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit{
NSNotificationCenter.defaultCenter().removeObserver(self)
}
var keyboardIsVisible = false
override func makeSpaceForKeyboard(notification: NSNotification) {
let info = notification.userInfo!
let keyboardHeight:CGFloat = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue().size.height
let duration:Double = info[UIKeyboardAnimationDurationUserInfoKey] as! Double
if notification.name == UIKeyboardWillShowNotification && keyboardIsVisible == false{
keyboardIsVisible = true
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height - keyboardHeight
self.view.frame = frame
})
} else if keyboardIsVisible == true && notification.name == UIKeyboardWillShowNotification{
}else {
keyboardIsVisible = false
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height + keyboardHeight
self.view.frame = frame
})
}
}
None of them worked for and I ended up using content insets to move my view up when the keyboard appears.
Note: I was using a UITableView
Referenced solution # keyboard-content-offset which was entirely written in objective C, the below solution is clean Swift.
Add the notification observer # viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(yourClass.keyboardWillBeShown), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(yourClass.keyboardWillBeHidden), name:UIKeyboardWillHideNotification, object: nil);
To get the keyboard size, we first get the userInfo dictionary from the notification object, which stores any additional objects that our receiver might use.
From that dictionary we can get the CGRect object describing the keyboard’s frame by using the key UIKeyboardFrameBeginUserInfoKey.
Apply the content inset for the table view # keyboardWillBeShown method,
func keyboardWillBeShown(sender: NSNotification)
{
// Move the table view
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
{
let contentInsets = UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.height), 0.0);
yourTableView.contentInset = contentInsets;
yourTableView.scrollIndicatorInsets = contentInsets;
}
}
Restore the view # keyboardWillBeHidden method
func keyboardWillBeHidden(sender: NSNotification)
{
// Moving back the table view back to the default position
yourTableView.contentInset = UIEdgeInsetsZero;
yourTableView.scrollIndicatorInsets = UIEdgeInsetsZero;
}
If you want to keep the device orientation also into consideration, use conditional statements to tailor the code to your needs.
// Portrait
UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.height), 0.0);
// Landscape
UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.width), 0.0);
I have been trying to add some code to move my view up when the keyboard appears, however, I am having issues trying to translate the Objective-C examples into Swift. I have made some progress, but I am stuck on one particular line.
These are the two tutorials/questions I have been following:
How to move content of UIViewController upwards as Keypad appears using Swift
http://www.ioscreator.com/tutorials/move-view-when-keyboard-appears
Here is the code I currently have:
override func viewWillAppear(animated: Bool) {
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(animated: Bool) {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardWillShow(notification: NSNotification) {
var keyboardSize = notification.userInfo(valueForKey(UIKeyboardFrameBeginUserInfoKey))
UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
let frame = self.budgetEntryView.frame
frame.origin.y = frame.origin.y - keyboardSize
self.budgetEntryView.frame = frame
}
func keyboardWillHide(notification: NSNotification) {
//
}
At the moment, I am getting an error on this line:
var keyboardSize = notification.userInfo(valueForKey(UIKeyboardFrameBeginUserInfoKey))
If someone could let me know what this line of code should be, I should manage to figure out the rest myself.
There are some problems in your line:
var keyboardSize = notification.userInfo(valueForKey(UIKeyboardFrameBeginUserInfoKey))
notification.userInfo returns an optional dictionary [NSObject : AnyObject]?,
so it must be unwrapped before accessing its values.
The Objective-C NSDictionary is mapped to a Swift native Dictionary, so you must
use the dictionary subscript syntax (dict[key]) to access the values.
The value must be cast to NSValue so that you can call CGRectValue on it.
All this can be achieved with a combination of optional assignment, optional chaining and optional casts:
if let userInfo = notification.userInfo {
if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
// ...
} else {
// no UIKeyboardFrameBeginUserInfoKey entry in userInfo
}
} else {
// no userInfo dictionary in notification
}
Or in one step:
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
// ...
}
Update for Swift 3.0.1 (Xcode 8.1):
if let userInfo = notification.userInfo {
if let keyboardSize = userInfo[UIKeyboardFrameBeginUserInfoKey] as? CGRect {
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
// ...
} else {
// no UIKeyboardFrameBeginUserInfoKey entry in userInfo
}
} else {
// no userInfo dictionary in notification
}
Or in one step:
if let keyboardSize = notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? CGRect {
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
// ...
}
Update for Swift 5 (Xcode 11.6):
guard let userInfo = notification.userInfo,
let keyboardSize = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else { return }
I recommend using keyboardFrameEndUserInfoKey instead of keyboardFrameBeginUserInfoKey since the keyboard changes the initial render height after the first display on older iOS devices.
For even less code consider looking at THIS
It was really helpful to me.
You just have to include the view constraint in the view controller and using the two observers you added. Then just use the following methods (it is supposed here you move a tableView)
func keyboardWillShow(sender: NSNotification) {
if let userInfo = sender.userInfo {
if let keyboardHeight = userInfo[UIKeyboardFrameEndUserInfoKey]?.CGRectValue().size.height {
tableViewBottomConstraint.constant = keyboardHeight
UIView.animateWithDuration(0.25, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
}
}
and
func keyboardWillHide(sender: NSNotification) {
if let userInfo = sender.userInfo {
if let keyboardHeight = userInfo[UIKeyboardFrameEndUserInfoKey]?.CGRectValue().size.height {
tableViewBottomConstraint.constant = 0.0
UIView.animateWithDuration(0.25, animations: { () -> Void in self.view.layoutIfNeeded() })
}
} }
If you are using storyboard, rather than manipulating the view itself, you can take advantage of auto-layout.
(This is a cleaned up version of Nicholas's Answer)
Set up notification center to notify you of the appearance and disappearance of the keyboard:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
And make sure that you remove the observers when you don't need them any more:
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: self.view.window)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: self.view.window)
}
Inside storyboard, set the bottom constraint. Create an outlet of that constraint:
and set the constraint's constant property when the keyboard is shown or hidden:
func keyboardWillShow(notification: NSNotification) {
guard let keyboardHeight = (notification.userInfo! as NSDictionary).objectForKey(UIKeyboardFrameBeginUserInfoKey)?.CGRectValue.size.height else {
return
}
nameOfOutlet.constant = keyboardHeight
view.layoutIfNeeded()
}
func keyboardWillHide(notification: NSNotification) {
nameOfOutlet.constant = 0.0
view.layoutIfNeeded()
}
Now, whenever the keyboard appears or disappears, autolayout will will take care of everything.
Swift 2
func keyboardWasShown(notification:NSNotification) {
guard let info:[NSObject:AnyObject] = notification.userInfo,
let keyboardSize:CGSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().size else { return }
let insets:UIEdgeInsets = UIEdgeInsetsMake(self.scrollView.contentInset.top, 0.0, keyboardSize.height, 0.0)
self.scrollView.contentInset = insets
self.scrollView.scrollIndicatorInsets = insets
}
Swift 3
func keyboardWasShown(notification:NSNotification) {
guard let info:[AnyHashable:Any] = notification.userInfo,
let keyboardSize:CGSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size else { return }
let insets:UIEdgeInsets = UIEdgeInsets(top: self.scrollView.contentInset.top, left: 0.0, bottom: keyboardSize.height, right: 0.0)
self.scrollView.contentInset = insets
self.scrollView.scrollIndicatorInsets = insets
}
This helped me : https://developer.apple.com/library/ios/samplecode/UICatalog/Listings/Swift_UICatalog_TextViewController_swift.html
let userInfo = notification.userInfo!
let animationDuration: NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as NSNumber).doubleValue
let keyboardScreenBeginFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as NSValue).CGRectValue()
let keyboardScreenEndFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as NSValue).CGRectValue()
You can use this one line for your line
var keyboardSize:CGSize = userInfo.objectForKey(UIKeyboardFrameBeginUserInfoKey)!.CGRectValue().size
Swift 3: UPDATE
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: self.view.window)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: self.view.window)
}
Swift - Keyboard Height From keyboardWillShowNotification
You can grow or shrink a constraint, or any other value, to the size of the keyboard using data from the keyboard Will/did Show/hide Notifications.
With a Layout Constraint
This minimal code registers for notification that the keyboard will show and updates a constraint based on its size.
#IBOutlet weak var keyboardConstraint: NSLayoutConstraint!
let keyboardConstraintMargin:CGFloat = 20
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: nil) { (notification) in
if let keyboardSize = notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? CGRect {
self.keyboardConstraint.constant = keyboardSize.height + self.keyboardConstraintMargin
}
}
NotificationCenter.default.addObserver(forName: UIResponder.keyboardDidHideNotification, object: nil, queue: nil) { (notification) in
self.keyboardConstraint.constant = self.keyboardConstraintMargin
}
}
With a ScrollView
In the same way this updates the content inset of a scroll view based on the keyboard's size.
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: nil) { (notification) in
if let keyboardSize = notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? CGRect {
let insets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
self.scrollView.contentInset = insets
self.scrollView.scrollIndicatorInsets = insets
}
}
NotificationCenter.default.addObserver(forName: UIResponder.keyboardDidHideNotification, object: nil, queue: nil) { (notification) in
let insets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
self.scrollView.contentInset = insets
self.scrollView.scrollIndicatorInsets = insets
}
}
Details
Xcode Version 11.1 (11A1027), iOS 13, Swift 5
Solution
import UIKit
protocol KeyboardNotificationsDelegate: class {
func keyboardWillShow(notification: NSNotification)
func keyboardWillHide(notification: NSNotification)
func keyboardDidShow(notification: NSNotification)
func keyboardDidHide(notification: NSNotification)
}
extension KeyboardNotificationsDelegate {
func keyboardWillShow(notification: NSNotification) {}
func keyboardWillHide(notification: NSNotification) {}
func keyboardDidShow(notification: NSNotification) {}
func keyboardDidHide(notification: NSNotification) {}
}
class KeyboardNotifications {
fileprivate var _isEnabled: Bool
fileprivate var notifications: [KeyboardNotificationsType]
fileprivate weak var delegate: KeyboardNotificationsDelegate?
init(notifications: [KeyboardNotificationsType], delegate: KeyboardNotificationsDelegate) {
_isEnabled = false
self.notifications = notifications
self.delegate = delegate
}
deinit { if isEnabled { isEnabled = false } }
}
// MARK: - enums
extension KeyboardNotifications {
enum KeyboardNotificationsType {
case willShow, willHide, didShow, didHide
var selector: Selector {
switch self {
case .willShow: return #selector(keyboardWillShow(notification:))
case .willHide: return #selector(keyboardWillHide(notification:))
case .didShow: return #selector(keyboardDidShow(notification:))
case .didHide: return #selector(keyboardDidHide(notification:))
}
}
var notificationName: NSNotification.Name {
switch self {
case .willShow: return UIResponder.keyboardWillShowNotification
case .willHide: return UIResponder.keyboardWillHideNotification
case .didShow: return UIResponder.keyboardDidShowNotification
case .didHide: return UIResponder.keyboardDidHideNotification
}
}
}
}
// MARK: - isEnabled
extension KeyboardNotifications {
private func addObserver(type: KeyboardNotificationsType) {
NotificationCenter.default.addObserver(self, selector: type.selector, name: type.notificationName, object: nil)
}
var isEnabled: Bool {
set {
if newValue {
for notificaton in notifications { addObserver(type: notificaton) }
} else {
NotificationCenter.default.removeObserver(self)
}
_isEnabled = newValue
}
get { return _isEnabled }
}
}
// MARK: - Notification functions
extension KeyboardNotifications {
#objc func keyboardWillShow(notification: NSNotification) {
delegate?.keyboardWillShow(notification: notification)
}
#objc func keyboardWillHide(notification: NSNotification) {
delegate?.keyboardWillHide(notification: notification)
}
#objc func keyboardDidShow(notification: NSNotification) {
delegate?.keyboardDidShow(notification: notification)
}
#objc func keyboardDidHide(notification: NSNotification) {
delegate?.keyboardDidHide(notification: notification)
}
}
Usage
class ViewController: UIViewController {
private lazy var keyboardNotifications: KeyboardNotifications! = {
return KeyboardNotifications(notifications: [.willShow, .willHide, .didShow, .didHide], delegate: self)
}()
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
keyboardNotifications.isEnabled = true
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
keyboardNotifications.isEnabled = false
}
}
extension ViewController: KeyboardNotificationsDelegate {
// If you don't need this func you can remove it
func keyboardWillShow(notification: NSNotification) {
print("keyboardWillShow")
guard let userInfo = notification.userInfo as? [String: NSObject],
let keyboardFrame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else { return }
print("keyboardFrame: \(keyboardFrame)")
}
// If you don't need this func you can remove it
func keyboardWillHide(notification: NSNotification) { print("keyboardWillHide") }
// If you don't need this func you can remove it
func keyboardDidShow(notification: NSNotification) { print("keyboardDidShow") }
// If you don't need this func you can remove it
func keyboardDidHide(notification: NSNotification) { print("keyboardDidHide") }
}
Full Sample
import UIKit
class ViewController: UIViewController {
private lazy var keyboardNotifications: KeyboardNotifications! = {
return KeyboardNotifications(notifications: [.willShow, .willHide, .didShow, .didHide], delegate: self)
}()
override func viewDidLoad() {
super.viewDidLoad()
let textField = UITextField(frame: CGRect(x: 40, y: 40, width: 200, height: 30))
textField.borderStyle = .roundedRect
view.addSubview(textField)
let gesture = UITapGestureRecognizer(target: view, action: #selector(UIView.endEditing(_:)))
view.addGestureRecognizer(gesture)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
keyboardNotifications.isEnabled = true
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
keyboardNotifications.isEnabled = false
}
}
extension ViewController: KeyboardNotificationsDelegate {
// If you don't need this func you can remove it
func keyboardWillShow(notification: NSNotification) {
print("keyboardWillShow")
guard let userInfo = notification.userInfo as? [String: NSObject],
let keyboardFrame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else { return }
print("keyboardFrame: \(keyboardFrame)")
}
// If you don't need this func you can remove it
func keyboardWillHide(notification: NSNotification) { print("keyboardWillHide") }
// If you don't need this func you can remove it
func keyboardDidShow(notification: NSNotification) { print("keyboardDidShow") }
// If you don't need this func you can remove it
func keyboardDidHide(notification: NSNotification) { print("keyboardDidHide") }
}
Result
Log
Swift 3.0
Here's an example of retrieving the keyboard size and using it to animate a view upward. In my case I am moving a UIView containing my UITextFields upward when a user begins typing so they can complete a form and still see the submit button at the bottom.
I added an outlet to the bottom space constraint of the view I wanted to animate and named it named myViewsBottomSpaceConstraint:
#IBOutlet weak var myViewsBottomSpaceConstraint: NSLayoutConstraint!
I then added the following code to my swift class:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: self.view.window)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: self.view.window)
}
func keyboardWillShow(notification: NSNotification) {
let userInfo = notification.userInfo as! [String: NSObject] as NSDictionary
let keyboardFrame = userInfo.value(forKey: UIKeyboardFrameEndUserInfoKey) as! CGRect
let keyboardHeight = keyboardFrame.height
myViewsBottomSpaceConstraint.constant = keyboardHeight
view.layoutIfNeeded()
}
func keyboardWillHide(notification: NSNotification) {
myViewsBottomSpaceConstraint.constant = 0.0
view.layoutIfNeeded()
}
For xamarin, you can use
c#6
private void KeyboardWillChangeFrame(NSNotification notification)
{
var keyboardSize = notification.UserInfo.ValueForKey(UIKeyboard.FrameEndUserInfoKey) as NSValue;
if (keyboardSize != null)
{
var rect= keyboardSize.CGRectValue;
//do your stuff here
}
}
c#7
private void KeyboardWillChangeFrame(NSNotification notification)
{
if (!(notification.UserInfo.ValueForKey(UIKeyboard.FrameEndUserInfoKey) is NSValue keyboardSize)) return;
var rect= keyboardSize.CGRectValue;
}
in Swift 4.2 you can use UIResponder.keyboardFrameEndUserInfoKey
guard let userInfo = notification.userInfo , let keyboardFrame:CGRect = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else { return }```
I have an app that has a text field on the lower half of the view.
This means that when I go to type in the text field the keyboard covers the textfield.
How would I go about moving the view upwards while typing so I can see what i'm typing and then moving it back down to its original place when the keyboard disappears?
I've looked everywhere but all the solutions appear to be in Obj-C which I can't quite convert just yet.
Any help would be greatly appreciated.
Here is a solution, without handling the switch from one textField to another:
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y -= keyboardSize.height
}
}
func keyboardWillHide(notification: NSNotification) {
self.view.frame.origin.y = 0
}
To solve this, replace the two functions keyboardWillShow/Hide with these:
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() {
if view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardSize.height
}
}
}
func keyboardWillHide(notification: NSNotification) {
if view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
Swift 3.0:
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardSize.height
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
Swift 4.0:
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardSize.height
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
Swift 4.2:
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardSize.height
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
Easiest way that doesn't even require any code:
Download KeyboardLayoutConstraint.swift and add (drag & drop) the file into your project, if you're not using the Spring animation framework already.
In your storyboard, create a bottom constraint for the View or Textfield, select the constraint (double-click it) and in the Identity Inspector, change its class from NSLayoutConstraint to KeyboardLayoutConstraint.
Done!
The object will auto-move up with the keyboard, in sync.
One of the popular answers on this thread uses the following code:
func keyboardWillShow(sender: NSNotification) {
self.view.frame.origin.y -= 150
}
func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y += 150
}
There's an obvious problem with offsetting your view by a static amount. It'll look nice on one device but will look bad on any other size configuration. You'll need to get the keyboards height and use that as your offset value.
Here's a solution that works on all devices and handles the edge-case where the user hides the predictive text field while typing.
Solution
Important to note below, we're passing self.view.window in as our object parameter. This will provide us with data from our Keyboard, such as its height!
#IBOutlet weak var messageField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: self.view.window)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: self.view.window)
}
func keyboardWillHide(sender: NSNotification) {
let userInfo: [NSObject : AnyObject] = sender.userInfo!
let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
self.view.frame.origin.y += keyboardSize.height
}
We'll make it look nice on all devices and handle the case where the user adds or removes the predictive text field.
func keyboardWillShow(sender: NSNotification) {
let userInfo: [NSObject : AnyObject] = sender.userInfo!
let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
let offset: CGSize = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue.size
if keyboardSize.height == offset.height {
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.view.frame.origin.y -= keyboardSize.height
})
} else {
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.view.frame.origin.y += keyboardSize.height - offset.height
})
}
}
Remove Observers
Don't forget to remove your observers before you leave the view to prevent unnecessary messages from being transmitted.
override func viewWillDisappear(animated: Bool) {
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: self.view.window)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: self.view.window)
}
Update based on question from comments:
If you have two or more text-fields, you can check to see if your view.frame.origin.y is at zero.
func keyboardWillShow(sender: NSNotification) {
let userInfo: [NSObject : AnyObject] = sender.userInfo!
let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
let offset: CGSize = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue.size
if keyboardSize.height == offset.height {
if self.view.frame.origin.y == 0 {
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.view.frame.origin.y -= keyboardSize.height
})
}
} else {
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.view.frame.origin.y += keyboardSize.height - offset.height
})
}
print(self.view.frame.origin.y)
}
Not an advertisement or promotion or spam, just a good solution. I know that this question has nearly 30 answers and I'm so shocked that no one even mentioned once about this beautiful GitHub project that does it all for you and even better. All the answers just move the view upwards. I just solved all my problems with this IQKeyboardManager. It has 13000+ stars.
Just add this in your podfile if you are using swift
pod 'IQKeyboardManagerSwift'
and then inside your AppDelegate.swift do import IQKeyboardManagerSwift
import IQKeyboardManagerSwift
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
IQKeyboardManager.shared.enable = true // just add this line
return true
}
}
Add the line IQKeyboardManager.shared.enable = true to enable it
This solution is a must if you are going for production.
I improved one of the answers a bit to make it work with different keyboards & different textviews/fields on one page:
Add observers:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
func keyboardWillHide() {
self.view.frame.origin.y = 0
}
func keyboardWillChange(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if YOURTEXTVIEW.isFirstResponder {
self.view.frame.origin.y = -keyboardSize.height
}
}
}
Remove observers:
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}
Add this to your viewcontroller. Works like a charm. Just adjust the values.
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name:NSNotification.Name.UIKeyboardWillShow, object: nil);
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name:NSNotification.Name.UIKeyboardWillHide, object: nil);
}
#objc func keyboardWillShow(sender: NSNotification) {
self.view.frame.origin.y -= 150
}
#objc func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y += 150
}
Swift 5.0:
After 4-5 hours of fight i came with a simple extension of UIViewController with simple code which works like charm
*View should not move when TextField is above the keyboard
*No need to set constant value to NSLayoutConstraint
*No third party library required
*No animation code required
*Works on tableview as well
*This works on Auto layout / auto resize
extension UIViewController {
func addKeyboardObserver() {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardNotifications(notification:)),
name: UIResponder.keyboardWillChangeFrameNotification,
object: nil)
}
func removeKeyboardObserver(){
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
}
// This method will notify when keyboard appears/ dissapears
#objc func keyboardNotifications(notification: NSNotification) {
var txtFieldY : CGFloat = 0.0 //Using this we will calculate the selected textFields Y Position
let spaceBetweenTxtFieldAndKeyboard : CGFloat = 5.0 //Specify the space between textfield and keyboard
var frame = CGRect(x: 0, y: 0, width: 0, height: 0)
if let activeTextField = UIResponder.currentFirst() as? UITextField ?? UIResponder.currentFirst() as? UITextView {
// Here we will get accurate frame of textField which is selected if there are multiple textfields
frame = self.view.convert(activeTextField.frame, from:activeTextField.superview)
txtFieldY = frame.origin.y + frame.size.height
}
if let userInfo = notification.userInfo {
// here we will get frame of keyBoard (i.e. x, y, width, height)
let keyBoardFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
let keyBoardFrameY = keyBoardFrame!.origin.y
let keyBoardFrameHeight = keyBoardFrame!.size.height
var viewOriginY: CGFloat = 0.0
//Check keyboards Y position and according to that move view up and down
if keyBoardFrameY >= UIScreen.main.bounds.size.height {
viewOriginY = 0.0
} else {
// if textfields y is greater than keyboards y then only move View to up
if txtFieldY >= keyBoardFrameY {
viewOriginY = (txtFieldY - keyBoardFrameY) + spaceBetweenTxtFieldAndKeyboard
//This condition is just to check viewOriginY should not be greator than keyboard height
// if its more than keyboard height then there will be black space on the top of keyboard.
if viewOriginY > keyBoardFrameHeight { viewOriginY = keyBoardFrameHeight }
}
}
//set the Y position of view
self.view.frame.origin.y = -viewOriginY
}
}
}
Add this Extension Of UIResponder to get which TextField is selected
extension UIResponder {
static weak var responder: UIResponder?
static func currentFirst() -> UIResponder? {
responder = nil
UIApplication.shared.sendAction(#selector(trap), to: nil, from: nil, for: nil)
return responder
}
#objc private func trap() {
UIResponder.responder = self
}
}
Then use of this in your any ViewController
override func viewWillAppear(_ animated: Bool) {
self.addKeyboardObserver()
}
override func viewWillDisappear(_ animated: Bool) {
self.removeKeyboardObserver()
}
Register this Notification in func viewWillAppear(_ animated: Bool)
Deregister this Notification in func viewWillDisappear(_ animated:Bool)
Download Demo Here
I see all answers are moving the view itself by the value of the keyboard height. Well, I have an elaborate answer, which could be useful if you are using constraints i.e autolayout, that moves a view by changing its constraint value (bottom or top constraints for example) by a predefined value or you can use keyboard size value.
In this example, I use bottom constraint from the textfield to Bottom Layout View with initial value of 175.
#IBOutlet weak var bottomConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
func keyboardWillShow(notification: NSNotification) {
//To retrieve keyboard size, uncomment following line
//let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue()
bottomConstraint.constant = 260
UIView.animateWithDuration(0.3) {
self.view.layoutIfNeeded()
}
}
func keyboardWillHide(notification: NSNotification) {
//To retrieve keyboard size, uncomment following line
//let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue()
bottomConstraint.constant = 175
UIView.animateWithDuration(0.3) {
self.view.layoutIfNeeded()
}
}
For Black Screen Error ( Swift 4 & 4.2 ) .
I fixed the black screen problem. In the verified solution The keyboard height changes after tapping and this is causing black screen.
Have to use UIKeyboardFrameEndUserInfoKey instead of UIKeyboardFrameBeginUserInfoKey
var isKeyboardAppear = false
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if !isKeyboardAppear {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0{
self.view.frame.origin.y -= keyboardSize.height
}
}
isKeyboardAppear = true
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if isKeyboardAppear {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y != 0{
self.view.frame.origin.y += keyboardSize.height
}
}
isKeyboardAppear = false
}
}
There have been som changes to how we define the KeyboardWillHideNotification.
This solution works with Swift 4.2:
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
#objc func keyboardWillShow(_ notification:Notification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
self.view.frame.origin.y -= keyboardSize.height
}
}
#objc func keyboardWillHide(_ notification:Notification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
self.view.frame.origin.y += keyboardSize.height
}
}
So none of the other answers seems to get it right.
The Good Behaviored Keyboard on iOS should:
Resize automatically when the keyboard change sizes (YES IT CAN)
Animate at the same speed as the keyboard
Animate using the same curve as the keyboard
Respect safe areas if relevant.
Works on iPad/Undocked mode too
My code use a NSLayoutConstraint declared as an #IBOutlet
#IBOutlet private var bottomLayoutConstraint: NSLayoutConstraint!
You could also use transforms, view offsets, .... I think it's easier with the constraint tho. It works by setting a constraint to the bottom, you might need to alter the code if your constant is not 0/Not to the bottom.
Here is the code:
// In ViewDidLoad
NotificationCenter.default.addObserver(self, selector: #selector(?MyViewController.keyboardDidChange), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
#objc func keyboardDidChange(notification: Notification) {
let userInfo = notification.userInfo! as [AnyHashable: Any]
let endFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
let animationDuration = userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as! NSNumber
let animationCurve = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as! NSNumber
bottomLayoutConstraint.constant = view.frame.height - endFrame.origin.y - view.safeAreaInsets.bottom // If your constraint is not defined as a safeArea constraint you might want to skip the last part.
// Prevents iPad undocked keyboard.
guard endFrame.height != 0, view.frame.height == endFrame.height + endFrame.origin.y else {
bottomLayoutConstraint.constant = 0
return
}
UIView.setAnimationCurve(UIView.AnimationCurve(rawValue: animationCurve.intValue)!)
UIView.animate(withDuration: animationDuration.doubleValue) {
self.view.layoutIfNeeded()
// Do additional tasks such as scrolling in a UICollectionView
}
}
I noticed that the other answers involved cutting some of the top from the view. If you want to simply resize the view without cutting any content, just try this method :)
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.setTranslatesAutoresizingMaskIntoConstraints(true)
self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.height - keyboardSize.height)
}
}
func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.collectionView.setTranslatesAutoresizingMaskIntoConstraints(false)
self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.height + keyboardSize.height)
}
}
For Swift 3, I made a UIViewController subclass since I needed constant behavior in all View Controllers.
class SomeClassVC: UIViewController {
//MARK: - Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
addKeyboardObservers()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
removeKeyboardObservers()
}
//MARK: - Overrides
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
view.endEditing(true)
}
//MARK: - Help
func addKeyboardObservers() {
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func removeKeyboardObservers() {
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: self.view.window)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: self.view.window)
}
func keyboardWillShow(notification: NSNotification) {
let keyboardHeight = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.height
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.window?.frame.origin.y = -1 * keyboardHeight!
self.view.layoutIfNeeded()
})
}
func keyboardWillHide(notification: NSNotification) {
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.window?.frame.origin.y = 0
self.view.layoutIfNeeded()
})
}
func resignTextFieldFirstResponders() {
for textField in self.view.subviews where textField is UITextField {
textField.resignFirstResponder()
}
}
func resignAllFirstResponders() {
view.endEditing(true)
}
}
The validated answer doesn't take in account the textfield position and has some bug (double displacement, never come back the primary position, displacement even if the texfield is on top of the view...)
The idea is :
to get the focus TextField absolute Y position
to get the keyboard height
to get the ScreenHeight
Then calculate the distance between keyboard position and textfield (if < 0 -> move up the view)
to use UIView.transform instead of UIView.frame.origin.y -= .., cause it's easier to come back to original position with UIView.transform = .identity
then we will be able to move the view only if necessary and of the specific displacement in oder to have the focused texField just over the keyboard
Here is the code :
Swift 4
class ViewController: UIViewController, UITextFieldDelegate {
var textFieldRealYPosition: CGFloat = 0.0
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(VehiculeViewController.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(VehiculeViewController.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
// Delegate all textfields
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
let distanceBetweenTextfielAndKeyboard = self.view.frame.height - textFieldRealYPosition - keyboardSize.height
if distanceBetweenTextfielAndKeyboard < 0 {
UIView.animate(withDuration: 0.4) {
self.view.transform = CGAffineTransform(translationX: 0.0, y: distanceBetweenTextfielAndKeyboard)
}
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
UIView.animate(withDuration: 0.4) {
self.view.transform = .identity
}
}
func textFieldDidBeginEditing(_ textField: UITextField) {
textFieldRealYPosition = textField.frame.origin.y + textField.frame.height
//take in account all superviews from textfield and potential contentOffset if you are using tableview to calculate the real position
}
}
My two cents for beginners:
in above samples someone changes coordinates, other uses "autoresizing mask", and other constraints:
As Apple says, do not mix these 3 types of logic.
If You have constraints in Storyboard, do not try to change x/y. It definitively not work.
its 100% Perfect Answer For all Guy's Update Tableview Height when open Keyboard
For Swift4.2
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(RecipeVC.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(RecipeVC.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if ((notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue) != nil {
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.tbl.contentInset
contentInset.bottom = keyboardFrame.size.height
self.tbl.contentInset = contentInset
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if ((notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue) != nil {
let contentInset:UIEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
self.tbl.contentInset = contentInset
}
}
Swift3.2
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(RecipeVC.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(RecipeVC.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
if ((notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue) != nil {
//self.view.frame.origin.y -= keyboardSize.height
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.tbl.contentInset
contentInset.bottom = keyboardFrame.size.height
self.tbl.contentInset = contentInset
}
}
func keyboardWillHide(notification: NSNotification) {
if ((notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue) != nil {
let contentInset:UIEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
self.tbl.contentInset = contentInset
}
}
Similar to #Boris answer, but in Swift 5:
override func viewDidLoad() {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
#IBAction func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= keyboardSize.height
}
}
}
#IBAction func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
For Swift 3
func textFieldDidBeginEditing(_ textField: UITextField) { // became first responder
//move textfields up
let myScreenRect: CGRect = UIScreen.main.bounds
let keyboardHeight : CGFloat = 216
UIView.beginAnimations( "animateView", context: nil)
var movementDuration:TimeInterval = 0.35
var needToMove: CGFloat = 0
var frame : CGRect = self.view.frame
if (textField.frame.origin.y + textField.frame.size.height + UIApplication.shared.statusBarFrame.size.height > (myScreenRect.size.height - keyboardHeight - 30)) {
needToMove = (textField.frame.origin.y + textField.frame.size.height + UIApplication.shared.statusBarFrame.size.height) - (myScreenRect.size.height - keyboardHeight - 30);
}
frame.origin.y = -needToMove
self.view.frame = frame
UIView.commitAnimations()
}
func textFieldDidEndEditing(_ textField: UITextField) {
//move textfields back down
UIView.beginAnimations( "animateView", context: nil)
var movementDuration:TimeInterval = 0.35
var frame : CGRect = self.view.frame
frame.origin.y = 0
self.view.frame = frame
UIView.commitAnimations()
}
Swift 4:
I was having an issue with the most accepted answer, in which hiding the keyboard did not return the view all the way to the bottom of the page (only partially). This worked for me (+updated for Swift 4).
override func viewDidLoad() {
super.viewDidLoad()
self.hideKeyboardWhenTappedAround()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0{
self.view.frame.origin.y -= keyboardSize.height
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y != 0{
self.view.frame.origin.y = 0
}
}
}
Here is my solution (actually this code is for the case when you have few textfields in your view, this works also for the case when you have one textfield)
class MyViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var firstTextField: UITextField!
#IBOutlet weak var secondTextField: UITextField!
var activeTextField: UITextField!
var viewWasMoved: Bool = false
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(PrintViewController.keyboardWillShow(_:)), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(PrintViewController.keyboardWillHide(_:)), name: UIKeyboardWillHideNotification, object: nil)
}
override func viewDidDisappear(animated: Bool) {
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func textFieldDidBeginEditing(textField: UITextField) {
self.activeTextField = textField
}
func textFieldDidEndEditing(textField: UITextField) {
self.activeTextField = nil
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
func keyboardWillShow(notification: NSNotification) {
let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue()
var aRect: CGRect = self.view.frame
aRect.size.height -= keyboardSize!.height
let activeTextFieldRect: CGRect? = activeTextField?.frame
let activeTextFieldOrigin: CGPoint? = activeTextFieldRect?.origin
if (!CGRectContainsPoint(aRect, activeTextFieldOrigin!)) {
self.viewWasMoved = true
self.view.frame.origin.y -= keyboardSize!.height
} else {
self.viewWasMoved = false
}
}
func keyboardWillHide(notification: NSNotification) {
if (self.viewWasMoved) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y += keyboardSize.height
}
}
}
Updated for Swift 3...
As others have said, you need to add notification observers in your controller's viewDidLoad() method, like so:
NotificationCenter.default.addObserver(forName: .UIKeyboardWillShow, object: nil, queue: nil)
{ notification in
self.keyboardWillShow(notification)
}
NotificationCenter.default.addObserver(forName: .UIKeyboardWillHide, object: nil, queue: nil)
{ notification in
self.keyboardWillHide(notification)
}
NotificationCenter.default.addObserver(forName: .UIKeyboardDidShow, object: nil, queue: nil)
{ _ in
self.enableUserInteraction()
}
NotificationCenter.default.addObserver(forName: .UIKeyboardDidHide, object: nil, queue: nil)
{ _ in
self.enableUserInteraction()
}
Remember to remove your observers where appropriate (I do it in the viewWillDisappear() method)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide, object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardDidShow, object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardDidHide, object: nil)
Then, implement your show and hide methods - notice the line that tells the app to ignore interaction events (beginIgnoringInteractionEvents). This is important since without it, the user could tap on a field or even a scrollview and cause the shift to occur a second time, resulting in a terrible UI glitch. Ignoring interaction events prior to the keyboard showing and hiding will prevent this:
func keyboardWillShow(notification: Notification)
{
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue
{
UIApplication.shared.beginIgnoringInteractionEvents()
self.view.frame.origin.y -= keyboardSize.height
// add this line if you are shifting a scrollView, as in a chat application
self.timelineCollectionView.contentInset.top += keyboardSize.height
}
}
func keyboardWillHide(notification: Notification)
{
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue
{
UIApplication.shared.beginIgnoringInteractionEvents()
self.view.frame.origin.y += keyboardSize.height
// add this line if you are shifting a scrollView, as in a chat application
self.timelineCollectionView.contentInset.top -= keyboardSize.height
}
}
Lastly, re-enable user interactions (remember, this method fires after the keyboard didShow or didHide):
func enableUserInteraction()
{
UIApplication.shared.endIgnoringInteractionEvents()
}
Swift 3 code
var activeField: UITextField?
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(ProfileViewController.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ProfileViewController.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func textFieldDidBeginEditing(_ textField: UITextField){
activeField = textField
}
func textFieldDidEndEditing(_ textField: UITextField){
activeField = nil
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if (self.activeField?.frame.origin.y)! >= keyboardSize.height {
self.view.frame.origin.y = keyboardSize.height - (self.activeField?.frame.origin.y)!
} else {
self.view.frame.origin.y = 0
}
}
}
func keyboardWillHide(notification: NSNotification) {
self.view.frame.origin.y = 0
}
If you have 2 or more text fields on the same VC, and the user taps on one of them and then taps on the other one, without calling the function keyboardWillHide, the view is going upwards one more time, which is not necessary, because you'll have the keyboard, a blank space which has the height of the keyboard, and then the view, using the code in the answer I edited:
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y -= keyboardSize.height
}
}
func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y += keyboardSize.height
}
}
To solve this, replace the two functions "KeyboardWillShow/Hide" to these:
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
if view.frame.origin.y == 0{
self.view.frame.origin.y -= keyboardSize.height
}
}
}
func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
if view.frame.origin.y != 0 {
self.view.frame.origin.y += keyboardSize.height
}
}
}
#Boris's solution is VERY good but the view can sometimes be corrupted.
For the perfect alignment, use the below code
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(ViewController.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)}
Functions:
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0{
self.view.frame.origin.y -= keyboardSize.height
}
}}
And,
#objc func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y != 0{
self.view.frame.origin.y = 0
}
} }
This implementation (Swift 4) will give you the behaviour that comes closest to the default behaviour of Android. Ie: moves the view up when the active textfield is under the keyboard and moves accordingly when the user switches to another view without closing the keyboard. Remember to call setTextFieldDelegates().
public class DelegateProxy: NSObject, UITextFieldDelegate {
private static let instance = DelegateProxies()
weak var activeTextField: UITextField?
var offset: CGFloat = 0
weak var vc: UIViewController?
var keyboardHeight: CGFloat = 0
public static func getDelegate(root: UIViewController) -> DelegateProxies {
instance.vc = root
return instance
}
public static func getDelegate() -> DelegateProxies {
return instance
}
public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
public func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
self.activeTextField = textField
let globalPointY: CGFloat = (textField.superview?.convert(textField.frame.origin, to: nil).y ?? CGFloat(0)) + textField.frame.height
offset = UIScreen.main.bounds.height - globalPointY
if keyboardHeight > 0 {
vc?.moveViewUp(offsetFromKeyboard: keyboardHeight - offset)
}
return true
}
}
extension UIViewController {
private func setTextFieldDelegates(parentView: UIView) {
for child in parentView.subviews {
setTextFieldDelegates(parentView: child)
(child as? UITextField)?.delegate = DelegateProxies.getDelegate(root: self)
}
}
func registerAutoResizeOnKeyboardAppear(){
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func unregisterAutoResizeOnKeyboard(){
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let offsetFromKeyboard = keyboardSize.height - DelegateProxies.getDelegate().offset
DelegateProxies.getDelegate().keyboardHeight = keyboardSize.height
moveViewUp(offsetFromKeyboard: offsetFromKeyboard)
}
}
func moveViewUp(offsetFromKeyboard: CGFloat){
print("offset from keyboard: \(offsetFromKeyboard)")
let moveOffset = offsetFromKeyboard + 8
if offsetFromKeyboard > 0 {
self.view.frame.origin.y = -moveOffset
}
if offsetFromKeyboard < 0 && view.frame.origin.y < 0 {
self.view.frame.origin.y += -moveOffset
if self.view.frame.origin.y > 0{
self.view.frame.origin.y = 0
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
self.view.frame.origin.y = 0
}
}
this video tutorial is the best. 7 mins long and it'll just make so much sense. Such a simple solution for when you have multiple text fields and want the scroll view to move "x" amount of pixels when that specific textfield is tapped.
https://youtu.be/VuiPGJOEBH4
Just these steps:
-Place all your textfields within a scrollview that is constrained to the edges of the view.
-Connect all the textfields and scroll view as delegates to the view controller.
-Connect all textfields and scroll view with an IBOutlet.
class ViewController: UIViewController, UITextFieldDelegate {
-Add UITextFieldDelegate protocol to your class
#IBOutlet var stateAddress: UITextField!
#IBOutlet var zipAddress: UITextField!
#IBOutlet var phoneNumber: UITextField!
#IBOutlet var vetEmailAddress: UITextField!
#IBOutlet weak var scrollView: UIScrollView!
-Add UITextFieldDelegate methods to your swift file:
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
func textFieldDidBeginEditing(textField: UITextField) {
if (textField == self.stateAddress) {
scrollView.setContentOffset(CGPointMake(0, 25), animated: true)
}
else if (textField == self.zipAddress) {
scrollView.setContentOffset(CGPointMake(0, 57), animated: true)
}
else if (textField == self.phoneNumber) {
scrollView.setContentOffset(CGPointMake(0, 112), animated: true)
}
else if (textField == self.vetEmailAddress) {
scrollView.setContentOffset(CGPointMake(0, 142), animated: true)
}
}
func textFieldDidEndEditing(textField: UITextField) {
scrollView.setContentOffset(CGPointMake(0, 0), animated: true)
}
The first method just activates the return button on the keyboard to dismiss the keyboard. The second is when you tap into whatever specific textfield then setting the y offset of how far your scrollview scrolls (mine is based off of the y location on my view controllers 25,57,112,142). The last says when you tap away from the keyboard the scrollview goes back to original location.
I made my view pixel perfect this way!
This feature shud have come built in Ios, however we need to do externally.
Insert the below code
* To move view when textField is under keyboard,
* Not to move view when textField is above keyboard
* To move View based on the height of the keyboard when needed.
This works and tested in all cases.
import UIKit
class NamVcc: UIViewController, UITextFieldDelegate
{
#IBOutlet weak var NamTxtBoxVid: UITextField!
var VydTxtBoxVar: UITextField!
var ChkKeyPadDspVar: Bool = false
var KeyPadHytVal: CGFloat!
override func viewDidLoad()
{
super.viewDidLoad()
NamTxtBoxVid.delegate = self
}
override func viewWillAppear(animated: Bool)
{
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(TdoWenKeyPadVyd(_:)),
name:UIKeyboardWillShowNotification,
object: nil);
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(TdoWenKeyPadHyd(_:)),
name:UIKeyboardWillHideNotification,
object: nil);
}
func textFieldDidBeginEditing(TxtBoxPsgVar: UITextField)
{
self.VydTxtBoxVar = TxtBoxPsgVar
}
func textFieldDidEndEditing(TxtBoxPsgVar: UITextField)
{
self.VydTxtBoxVar = nil
}
func textFieldShouldReturn(TxtBoxPsgVar: UITextField) -> Bool
{
self.VydTxtBoxVar.resignFirstResponder()
return true
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
view.endEditing(true)
super.touchesBegan(touches, withEvent: event)
}
func TdoWenKeyPadVyd(NfnPsgVar: NSNotification)
{
if(!self.ChkKeyPadDspVar)
{
self.KeyPadHytVal = (NfnPsgVar.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue().height
var NonKeyPadAraVar: CGRect = self.view.frame
NonKeyPadAraVar.size.height -= self.KeyPadHytVal
let VydTxtBoxCenVal: CGPoint? = VydTxtBoxVar?.frame.origin
if (!CGRectContainsPoint(NonKeyPadAraVar, VydTxtBoxCenVal!))
{
self.ChkKeyPadDspVar = true
UIView.animateWithDuration(1.0,
animations:
{ self.view.frame.origin.y -= (self.KeyPadHytVal)},
completion: nil)
}
else
{
self.ChkKeyPadDspVar = false
}
}
}
func TdoWenKeyPadHyd(NfnPsgVar: NSNotification)
{
if (self.ChkKeyPadDspVar)
{
self.ChkKeyPadDspVar = false
UIView.animateWithDuration(1.0,
animations:
{ self.view.frame.origin.y += (self.KeyPadHytVal)},
completion: nil)
}
}
override func viewDidDisappear(animated: Bool)
{
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self)
view.endEditing(true)
ChkKeyPadDspVar = false
}
}
|::| Sometimes View wil be down, In that case use height +/- 150 :
NonKeyPadAraVar.size.height -= self.KeyPadHytVal + 150
{ self.view.frame.origin.y -= self.KeyPadHytVal - 150},
completion: nil)
{ self.view.frame.origin.y += self.KeyPadHytVal - 150},
completion: nil)
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y = self.view.frame.height - (self.view.frame.height + keyboardSize.height)
}
}
func keyboardWillHide(notification: NSNotification) {
self.view.frame.origin.y = 0
}
it must be more stable
override func viewWillAppear(animated: Bool)
{
super.viewWillAppear(animated)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}
// MARK: - keyboard
func keyboardWillShow(notification: NSNotification)
{
if let userInfo = notification.userInfo {
if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
let contentInsets = self.tblView.contentInset as UIEdgeInsets
self.tblView.contentInset = UIEdgeInsets(top: contentInsets.top, left: contentInsets.left, bottom: keyboardSize.height, right:contentInsets.right)
// ...
} else {
// no UIKeyboardFrameBeginUserInfoKey entry in userInfo
}
} else {
// no userInfo dictionary in notification
}
}
func keyboardWillHide(notification: NSNotification)
{
let contentInsets = self.tblView.contentInset as UIEdgeInsets
self.tblView.contentInset = UIEdgeInsets(top: contentInsets.top, left: contentInsets.left, bottom: 0, right:contentInsets.right)
}
Use following code for view Up on UITextField Clicked
func textFieldDidBeginEditing(textField: UITextField) {
ViewUpanimateMoving(true, upValue: 100)
}
func textFieldDidEndEditing(textField: UITextField) {
ViewUpanimateMoving(false, upValue: 100)
}
func ViewUpanimateMoving (up:Bool, upValue :CGFloat){
var durationMovement:NSTimeInterval = 0.3
var movement:CGFloat = ( up ? -upValue : upValue)
UIView.beginAnimations( "animateView", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(durationMovement)
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
UIView.commitAnimations()
}