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I have a problem about the keyboard.
If I want to keep showing keyboard when I tap, and what should I do.
I also mark the addObserver function "keyboardWillHide", but the keyboard also dismiss.
Thanks.
This is code:
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name:.UIKeyboardWillShow, object: nil)
//NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name:.UIKeyboardWillHide, object: nil)
}
override func keyboardWillShow(notification: NSNotification) {
super.keyboardWillShow(notification: notification)
if let userInfo:NSDictionary = notification.userInfo as NSDictionary? {
if let keyboardFrame:NSValue = userInfo.value(forKey: UIKeyboardFrameEndUserInfoKey) as? NSValue {
keyboardHeight = keyboardFrame.cgRectValue.height
}
}
setUserMode(mode: .keyboard)
updateViewFrame()
}
override func keyboardWillHide(notification: NSNotification) {
keyboardHeight = 0
updateViewFrame()
}
func updateViewFrame() {
var diffHeight:CGFloat = UIApplication.shared.statusBarFrame.height
if let nav = navigationController {
diffHeight += nav.navigationBar.height
}
let newFrame = CGRect(x: 0, y: diffHeight, width: ScreenWidth, height: ScreenHeight-keyboardHeight-diffHeight)
if view.frame.equalTo(newFrame) == false {
view.frame = newFrame
self.tableView.frame = newFrame
}
}
Image here:
Just call :
YourTextView.keyboardDismissMode = .none
i have an one textView and textfield in storyboard. i want to move up scroll view when textfield or textView show keyboard. every thing work fine for UITextField but for textView thats not working. there is my code for moving up view:
func keyboardWillShow(notification: NSNotification) {
if let endFrame = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
var keyboardHeight = view.bounds.height - endFrame.origin.y
if #available(iOS 11, *) {
if keyboardHeight > 0 {
keyboardHeight = keyboardHeight - view.safeAreaInsets.bottom
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = keyboardHeight
viewBottom.constant = keyboardHeight
self.scrollView.contentInset = contentInset
}
}
else {
let keyboardSize = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue.size
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = (keyboardSize.height)
self.scrollView.contentInset = contentInset
}
view.layoutIfNeeded()
}
}
func keyboardWillHide(notification: NSNotification) {
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = 0
self.scrollView.contentInset = contentInset
}
what is difference between textfield and textView for showing keyboard?
when i tap textview that's method called and scroll view content inset same as when tap on textfield but view don't move up.
how can solve this problem?
class matchViewController: UIViewController,UITextViewDelegate {
var activeTextview: UITextView?
#IBOutlet weak var yourTextview: UITextView!
#IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
yourTextview.delegate=self
NotificationCenter.default.addObserver(self, selector: #selector(yourViewController.keyboardWillShow(_:)), name:NSNotification.Name.UIKeyboardWillShow, object: self.view.window)
NotificationCenter.default.addObserver(self, selector: #selector(yourViewController.keyboardWillHide(_:)), name:NSNotification.Name.UIKeyboardWillHide, object: self.view.window)
}
#objc func keyboardWillShow(_ sender: Notification) {
var info: [AnyHashable : Any] = sender.userInfo!
let kbSize: CGSize = ((info[UIKeyboardFrameEndUserInfoKey]! as AnyObject).cgRectValue.size)
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0)
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
var aRect: CGRect = self.view.frame
aRect.size.height -= kbSize.height
if let activeTextview=activeTextview{
self.scrollView.scrollRectToVisible((activeTextview.frame), animated: true)
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?){
view.endEditing(true)
super.touchesBegan(touches, with: event)
}
#objc func keyboardWillHide(_ sender: Notification) {
let userInfo: [AnyHashable: Any] = sender.userInfo!
let keyboardSize: CGSize = (userInfo[UIKeyboardFrameBeginUserInfoKey]! as AnyObject).cgRectValue.size
self.scrollView.frame.origin.y += keyboardSize.height
}
override func viewDidDisappear(_ animated: Bool) {
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 textViewDidBeginEditing(_ textView: UITextView) {
activeTextview=textView
}
func textViewDidEndEditing(_ textView: UITextView){
activeTextview=nil
}
}
I have a registration screen of textFields & textViews placed on a scroll view. For moving the view above text field I used the following codes -
mark: I have connected all the delegates properly.
var activeTextField:UITextField?
viewDidLoad()
{
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWasShown:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillBeHidden:"), name: UIKeyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(animated: Bool)
{
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardDidHideNotification, object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}
func textFieldDidBeginEditing(textField: UITextField)
{
self.activeTextField = textField
}
func textFieldDidEndEditing(textField: UITextField)
{
self.activeTextField = nil
}
func textViewDidBeginEditing(textView: UITextView)
{
textView.becomeFirstResponder()
self.scrollView.setContentOffset(CGPointMake(0, 180), animated: true)
}
func textViewDidEndEditing(textView: UITextView)
{
self.scrollView.setContentOffset(CGPointMake(0, 0), animated: true)
textView.resignFirstResponder()
}
func keyboardWasShown(notification: NSNotification)
{
// Step 1: Get the size of the keyboard.
let info : NSDictionary = notification.userInfo!
let keyboardSize = (info.objectForKey(UIKeyboardFrameBeginUserInfoKey)?.CGRectValue as CGRect!).size
// Step 2: Adjust the bottom content inset of your scroll view by the keyboard height.
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize.height, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
// Step 3: Scroll the target text field into view.
var aRect: CGRect = self.view.frame
aRect.size.height -= keyboardSize.height
if !CGRectContainsPoint(aRect, activeTextField!.frame.origin)
{
let scrollPoint: CGPoint = CGPointMake(0.0, activeTextField!.frame.origin.y - (keyboardSize.height - 15))
self.scrollView.setContentOffset(scrollPoint, animated: true)
}
}
func keyboardWillBeHidden(notification: NSNotification)
{
let contentInsets: UIEdgeInsets = UIEdgeInsetsZero
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
}
But as soon as I click on the textView I get an error message as -
But there is no error related breaks in my viewController. So what might be the error?
I started creating a simple iOS app that does some operations.
But I'm having some problems when the keyboard appears, hiding one of my textfields.
I think it's a common problem and I did some research but I couldn't find anything that solved my problem.
I want to use a ScrollView rather than animate the textfield to make it visible.
In ViewDidLoad, register the notifications:
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name:UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name:UIResponder.keyboardWillHideNotification, object: nil)
Add below observer methods which does the automatic scrolling when keyboard appears.
#objc func keyboardWillShow(notification:NSNotification) {
guard let userInfo = notification.userInfo else { return }
var keyboardFrame:CGRect = (userInfo[UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = keyboardFrame.size.height + 20
scrollView.contentInset = contentInset
}
#objc func keyboardWillHide(notification:NSNotification) {
let contentInset:UIEdgeInsets = UIEdgeInsets.zero
scrollView.contentInset = contentInset
}
The top answer for swift 3:
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)
And then:
func keyboardWillShow(notification:NSNotification){
//give room at the bottom of the scroll view, so it doesn't cover up anything the user needs to tap
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.theScrollView.contentInset
contentInset.bottom = keyboardFrame.size.height
theScrollView.contentInset = contentInset
}
func keyboardWillHide(notification:NSNotification){
let contentInset:UIEdgeInsets = UIEdgeInsets.zero
theScrollView.contentInset = contentInset
}
Here is a complete solution, utilizing guard and concise code. Plus correct code in keyboardWillHide to only reset the bottom to 0.
#IBOutlet private weak var scrollView: UIScrollView!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
registerNotifications()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
scrollView.contentInset.bottom = 0
}
private func registerNotifications() {
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 private func keyboardWillShow(notification: NSNotification){
guard let keyboardFrame = notification.userInfo![UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
scrollView.contentInset.bottom = view.convert(keyboardFrame.cgRectValue, from: nil).size.height
}
#objc private func keyboardWillHide(notification: NSNotification){
scrollView.contentInset.bottom = 0
}
for Swift 4.0
In ViewDidLoad
// setup keyboard event
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)
Add below observer methods which does the automatic scrolling when keyboard appears.
#objc func keyboardWillShow(notification:NSNotification){
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.ui_scrollView.contentInset
contentInset.bottom = keyboardFrame.size.height
ui_scrollView.contentInset = contentInset
}
#objc func keyboardWillHide(notification:NSNotification){
let contentInset:UIEdgeInsets = UIEdgeInsets.zero
ui_scrollView.contentInset = contentInset
}
contentInset doesn't work for me, because I want the scrollview move all the way up above the keyboard. So I use contentOffset:
func keyboardWillShow(notification:NSNotification) {
guard let keyboardFrameValue = notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue else {
return
}
let keyboardFrame = view.convert(keyboardFrameValue.cgRectValue, from: nil)
scrollView.contentOffset = CGPoint(x:0, y:keyboardFrame.size.height)
}
func keyboardWillHide(notification:NSNotification) {
scrollView.contentOffset = .zero
}
Swift 5 Only adjust ScrollView when TextField is hidden by keyboard (for multiple TextFields)
Add / Remove Observers:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillChangeFrameNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self)
}
Keep track of these values so you can return to your original position:
var scrollOffset : CGFloat = 0
var distance : CGFloat = 0
Adjust ScrollView contentOffset depending on TextField Location:
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
var safeArea = self.view.frame
safeArea.size.height += scrollView.contentOffset.y
safeArea.size.height -= keyboardSize.height + (UIScreen.main.bounds.height*0.04) // Adjust buffer to your liking
// determine which UIView was selected and if it is covered by keyboard
let activeField: UIView? = [textFieldA, textViewB, textFieldC].first { $0.isFirstResponder }
if let activeField = activeField {
if safeArea.contains(CGPoint(x: 0, y: activeField.frame.maxY)) {
print("No need to Scroll")
return
} else {
distance = activeField.frame.maxY - safeArea.size.height
scrollOffset = scrollView.contentOffset.y
self.scrollView.setContentOffset(CGPoint(x: 0, y: scrollOffset + distance), animated: true)
}
}
// prevent scrolling while typing
scrollView.isScrollEnabled = false
}
}
#objc func keyboardWillHide(notification: NSNotification) {
if distance == 0 {
return
}
// return to origin scrollOffset
self.scrollView.setContentOffset(CGPoint(x: 0, y: scrollOffset), animated: true)
scrollOffset = 0
distance = 0
scrollView.isScrollEnabled = true
}
Make sure to use [UIResponder.keyboardFrameEndUserInfoKey] to get the proper keyboard height the first time.
From the answer by Sudheer Palchuri, converted for Swift 4.
In ViewDidLoad, register the notifications:
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)
And then:
// MARK: - Keyboard Delegates
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
#objc func keyboardWillShow(notification:NSNotification){
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = keyboardFrame.size.height
self.scrollView.contentInset = contentInset
}
#objc func keyboardWillHide(notification:NSNotification){
let contentInset:UIEdgeInsets = UIEdgeInsets.zero
self.scrollView.contentInset = contentInset
}
Reading the links you sent to me, I found a way to make it work, thanks!:
func textFieldDidBeginEditing(textField: UITextField) {
if (textField == //your_field) {
scrollView.setContentOffset(CGPointMake(0, field_extra.center.y-280), animated: true)
callAnimation()
viewDidLayoutSubviews()
}
}
func textFieldDidEndEditing(textField: UITextField) {
if (textField == //your_field){
scrollView .setContentOffset(CGPointMake(0, 0), animated: true)
viewDidLayoutSubviews()
}
}
This is a refinement on Zachary Probst solution posted above.
I ran into a few issues with his solution and fixed it and enhanced it a bit.
This version does not need to pass in a list of UITextView controls. It finds the first responder in the current view. It also handles UITextView controls at any level in the View hierarchy.
I think his safeArea calculation wasn't quite right scrollView.contentOffset.y needed sign changed. It didn't show up if it was not scrolled. This fixed incremental scrolling. It might have been from other changes I made.
This works if the user jumps around to other UITextViews while the keyboard is up.
This is a Base Class I use for a bunch of ViewControllers. The inherited ViewController just needs to set the UIScrollViewer which activates this code behavior.
class ThemeAwareViewController: UIViewController
{
var scrollViewForKeyBoard: UIScrollView? = nil
var saveOffsetForKeyBoard: CGPoint?
func findViewThatIsFirstResponder(view: UIView) -> UIView?
{
if view.isFirstResponder {
return view
}
for subView in view.subviews {
if let hit = findViewThatIsFirstResponder(view: subView) {
return hit
}
}
return nil
}
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
if let scrollView = scrollViewForKeyBoard {
var safeArea = self.view.frame
safeArea.size.height -= scrollView.contentOffset.y
safeArea.size.height -= keyboardSize.height
safeArea.size.height -= view.safeAreaInsets.bottom
let activeField: UIView? = findViewThatIsFirstResponder(view: view)
if let activeField = activeField {
// This line had me stumped for a while (I was passing in .frame)
let activeFrameInView = view.convert(activeField.bounds, from: activeField)
let distance = activeFrameInView.maxY - safeArea.size.height
if saveOffsetForKeyBoard == nil {
saveOffsetForKeyBoard = scrollView.contentOffset
}
scrollView.setContentOffset(CGPoint(x: 0, y: distance), animated: true)
}
}
}
}
#objc func keyboardWillHide(notification: NSNotification) {
guard let restoreOffset = saveOffsetForKeyBoard else {
return
}
if let scrollView = scrollViewForKeyBoard {
scrollView.setContentOffset(restoreOffset, animated: true)
self.saveOffsetForKeyBoard = nil
}
}
}
You can animate your scrollview to center on your UITextField on keyboard appearance (ie. making your textfield the first responder) via a scroll offset. Here are a couple of good resources to get you started (there are a bunch on this site):
How programmatically move a UIScrollView to focus in a control above keyboard?
How to make a UIScrollView auto scroll when a UITextField becomes a first responder
Additionally, if you simply use a UITableView with your content in cells, when the textfield becomes first responder, the UITableViewController will automatically scroll to the textfield cell for you (though I'm not sure this is what you want to do).
An answer for Swift 3, based on the one proposed by Daniel Jones, but safer (thanks to the guard), more concise and with consistent scroll indicator insets:
#objc private func keyboardWillBeShown(notification: NSNotification) {
guard let keyboardFrameValue = notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue else { return }
let keyboardFrame = view.convert(keyboardFrameValue.cgRectValue, from: nil)
scrollView.contentInset.bottom = keyboardFrame.size.height
scrollView.scrollIndicatorInsets = scrollView.contentInset
}
#objc private func keyboardWillBeHidden() {
scrollView.contentInset = .zero
scrollView.scrollIndicatorInsets = scrollView.contentInset
}
In Swift4, just add the following extension.
extension UIViewController {
func setupViewResizerOnKeyboardShown() {
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardWillShowForResizing),
name:
Notification.Name.UIKeyboardWillShow,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardWillHideForResizing),
name: Notification.Name.UIKeyboardWillHide,
object: nil)
}
#objc func keyboardWillShowForResizing(notification: Notification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
let window = self.view.window?.frame {
// We're not just minusing the kb height from the view height because
// the view could already have been resized for the keyboard before
self.view.frame = CGRect(x: self.view.frame.origin.x,
y: self.view.frame.origin.y,
width: self.view.frame.width,
height: window.origin.y + window.height - keyboardSize.height)
} else {
debugPrint("We're showing the keyboard and either the keyboard size or window is nil: panic widely.")
}
}
#objc func keyboardWillHideForResizing(notification: Notification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let viewHeight = self.view.frame.height
self.view.frame = CGRect(x: self.view.frame.origin.x,
y: self.view.frame.origin.y,
width: self.view.frame.width,
height: viewHeight + keyboardSize.height)
} else {
debugPrint("We're about to hide the keyboard and the keyboard size is nil. Now is the rapture.")
}
}
}
There is a simple solution here
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
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)
}
func keyboardWillShow(_ notification:Notification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
tableView.contentInset = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0)
}
}
func keyboardWillHide(_ notification:Notification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
tableView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0)
}
}
In case anyone is looking for Objective-C code for this solution:
- (void)keyboardWasShown:(NSNotification *)notification {
NSDictionary* info = [notification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = baseScrollView.contentInset;
contentInsets.bottom = kbSize.height;
baseScrollView.contentInset = contentInsets;
}
- (void)keyboardWillBeHidden:(NSNotification *)notification {
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
baseScrollView.contentInset = contentInsets;
[baseScrollView endEditing:YES];
}
In my situation it was
ScrollView
-->
TableView
-->
TableViewCell
So I had to get y position in relative to keyboard frame and check if keyboard y position and my active field y position was intersecting or not
#objc func keyboardWillShow(_ notification: Foundation.Notification) {
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
keyboardFrame = self.view.convert(keyboardFrame, from: nil)
var contentInset:UIEdgeInsets = self.scrollView!.contentInset
contentInset.bottom = keyboardFrame.size.height
let loc = self.activeTextField?.convert(activeTextField!.bounds, to: self.view)
if keyboardFrame.origin.y < loc!.origin.y {
self.scrollView?.contentOffset = CGPoint.init(x: (self.scrollView?.contentOffset.x)!, y: loc!.origin.y)
}
if self.scrollView?.contentInset.bottom == 0 {
self.scrollView?.contentInset = contentInset
}
}
How do I prevent a UITextField from being hidden by the keyboard?
I assume this is happening on a UIViewController. If so, you can setup the following two functions to be called when the keyboard will show/hide, and respond appropriately in their blocks.
Setting up the UIViewController:
class ViewController: UIViewController, UITextFieldDelegate... {
var frameView: UIView!
First, in viewDidLoad():
override func viewDidLoad() {
self.frameView = UIView(frame: CGRect(x: 0, y: 0, width: self.view.bounds.width, height: self.view.bounds.height))
// Keyboard stuff.
let center: NotificationCenter = NotificationCenter.default
center.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
center.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
Then implement the following two functions to respond to your NotificationCenter functions defined in viewDidLoad() above. I give you an example of moving the entire view, but you can also animate just the UITextFields.
#objc func keyboardWillShow(notification: NSNotification) {
let info:NSDictionary = notification.userInfo! as NSDictionary
let keyboardSize = (info[UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let keyboardHeight: CGFloat = keyboardSize.height
let _: CGFloat = info[UIResponder.keyboardAnimationDurationUserInfoKey] as! NSNumber as! CGFloat
UIView.animate(withDuration: 0.25, delay: 0.25, options: .curveEaseInOut, animations: {
self.frameView.frame = CGRect(x: 0, y: (self.frameView.frame.origin.y - keyboardHeight), width: self.view.bounds.width, height: self.view.bounds.height)
}, completion: nil)
}
#objc func keyboardWillHide(notification: NSNotification) {
let info: NSDictionary = notification.userInfo! as NSDictionary
let keyboardSize = (info[UIResponder.keyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let keyboardHeight: CGFloat = keyboardSize.height
let _: CGFloat = info[UIResponder.keyboardAnimationDurationUserInfoKey] as! NSNumber as! CGFloat
UIView.animate(withDuration: 0.25, delay: 0.25, options: .curveEaseInOut, animations: {
self.frameView.frame = CGRect(x: 0, y: (self.frameView.frame.origin.y + keyboardHeight), width: self.view.bounds.width, height: self.view.bounds.height)
}, completion: nil)
}
Don't forget to remove the notifications when leaving your view
override func viewWillDisappear(_ animated: Bool) {
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}
Here is the simple solution in Swift. I translated some Objective-C code that worked for me in the past.
func textFieldDidBeginEditing(textField: UITextField) { // became first responder
//move textfields up
let myScreenRect: CGRect = UIScreen.mainScreen().bounds
let keyboardHeight : CGFloat = 216
UIView.beginAnimations( "animateView", context: nil)
var movementDuration:NSTimeInterval = 0.35
var needToMove: CGFloat = 0
var frame : CGRect = self.view.frame
if (textField.frame.origin.y + textField.frame.size.height + /*self.navigationController.navigationBar.frame.size.height + */UIApplication.sharedApplication().statusBarFrame.size.height > (myScreenRect.size.height - keyboardHeight)) {
needToMove = (textField.frame.origin.y + textField.frame.size.height + /*self.navigationController.navigationBar.frame.size.height +*/ UIApplication.sharedApplication().statusBarFrame.size.height) - (myScreenRect.size.height - keyboardHeight);
}
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:NSTimeInterval = 0.35
var frame : CGRect = self.view.frame
frame.origin.y = 0
self.view.frame = frame
UIView.commitAnimations()
}
Swift 4 code, It is very simple instead of using many things like NSNotificationCenter, then calculating the height of everything and making conditions makes this more complicated,
The Simple way to do this is coded below, it will work to move up the view.
func textFieldDidBeginEditing(_ textField: UITextField) {
moveTextField(textfield: textField, moveDistance: -250, up: true)
}
func textFieldDidEndEditing(_ textField: UITextField) {
moveTextField(textfield: textField, moveDistance: -250, up: false)
}
func moveTextField(textfield: UITextField, moveDistance: Int, up: Bool) {
let moveDuration = 0.3
let movement: CGFloat = CGFloat(up ? moveDistance: -moveDistance)
UIView.beginAnimations("animateTextField", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(moveDuration)
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
UIView.commitAnimations()
}
you can change that -250 value according to the placement of your textfields.
In case you are using a UIScrollView or any of its subclasses, e.g., UITableView, you can also manipulate the contentInset property. That way you do not have to mess with frame, bounds, NSLayoutConstraint or NSLayoutAnchor.
func keyboardWillShow(notification: Notification) {
let info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let keyboardHeight: CGFloat = keyboardSize.height
let duration = info[UIKeyboardAnimationDurationUserInfoKey] as! TimeInterval
UIView.animate(withDuration: duration, delay: 0, options: UIViewAnimationOptions.curveEaseInOut, animations: {
self.tableView?.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: keyboardHeight, right: 0)
}, completion: nil)
}
func keyboardWillHide(notification: Notification) {
let info = notification.userInfo!
let duration = info[UIKeyboardAnimationDurationUserInfoKey] as! TimeInterval
UIView.animate(withDuration: duration, delay: 0, options: UIViewAnimationOptions.curveEaseInOut, animations: {
self.tableView?.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
}, completion: nil)
}
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: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
Swift 3.0
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
}
In Swift 3 use this code
override func viewDidLoad() {
super.viewDidLoad()
let center: NotificationCenter = NotificationCenter.default
center.addObserver(self, selector: #selector(RFLogInViewController.keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
center.addObserver(self, selector: #selector(RFLogInViewController.keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
let info:NSDictionary = notification.userInfo! as NSDictionary
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let keyboardHeight: CGFloat = keyboardSize.height
let _: CGFloat = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber as! CGFloat
UIView.animate(withDuration: 0.25, delay: 0.25, options: .curveEaseInOut, animations: {
self.view.frame = CGRect(x: 0, y: (self.view.frame.origin.y - keyboardHeight), width: self.view.bounds.width, height: self.view.bounds.height)
}, completion: nil)
}
func keyboardWillHide(notification: NSNotification) {
let info: NSDictionary = notification.userInfo! as NSDictionary
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
let keyboardHeight: CGFloat = keyboardSize.height
let _: CGFloat = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber as! CGFloat
UIView.animate(withDuration: 0.25, delay: 0.25, options: .curveEaseInOut, animations: {
self.view.frame = CGRect(x: 0, y: (self.view.frame.origin.y + keyboardHeight), width: self.view.bounds.width, height: self.view.bounds.height)
}, completion: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(true)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
Just add 'IQKeyboardManager' library into your project, and Done. You have not to do anything else. For reference please check this url.
https://github.com/hackiftekhar/IQKeyboardManager
Swift 4
I have seen numerous of answer and plenty of them did not work for me where I have a UIViewController With numerous of text fields.
According to the Apple documentation I have translate the example to Swift 4
Your content needs to be embedded within an scrollview.
Add the notification listeners for when the keyboard will appear or dissappear.
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidShow), name: .UIKeyboardDidShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: .UIKeyboardWillHide, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self)
}
Implement UITextField Delegates
func textFieldDidBeginEditing(_ textField: UITextField) {
currentTextField = textField
}
func textFieldDidEndEditing(_ textField: UITextField, reason: UITextFieldDidEndEditingReason) {
currentTextField = nil
}
Selectors
#objc func keyboardDidShow(notification: NSNotification) {
print("\(logClassName): keyboardWDidShow")
let keyboardFrame = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
let keyboardSize:CGSize = keyboardFrame!.size
let contentInsets:UIEdgeInsets = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0)
trackScrollView.contentInset = contentInsets
trackScrollView.scrollIndicatorInsets = contentInsets
var aRect:CGRect = self.view.frame
aRect.size.height -= keyboardSize.height
if !(aRect.contains(currentTextField!.frame.origin)){
trackScrollView.scrollRectToVisible(currentTextField!.frame, animated: true)
}
}
#objc func keyboardWillHide(notification: NSNotification){
print("\(logClassName): keyboardWillHide")
let contentInsents:UIEdgeInsets = UIEdgeInsets.zero
trackScrollView.contentInset = contentInsents
trackScrollView.scrollIndicatorInsets = contentInsents
}
first of all you should have scrollview
step 1:find the height of key board
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo ? [UIKeyboardFrameBeginUserInfoKey] as ? NSValue) ? .cgRectValue {
let keyboardHeight = keyboardSize.height
a = keyboardHeight
}
}
step 2: bind the delegete methods of textfield
func textFieldDidBeginEditing(_ textField: UITextField) {
utility.setUserDefaultBool(value: false, key: "FrameMoveFlag") //flag
let b = view1.frame.height - textField.frame.origin.y
if (b < 350) {
view1.frame.origin.y = view1.frame.origin.y + (view1.frame.height - textField.frame.origin.y) - (a + 50)
utility.setUserDefaultBool(value: true, key: "FrameMoveFlag") //flag
}
}
func textFieldDidEndEditing(_ textField: UITextField) {
if (utility.getUserDefaultBOOLForKey(key: "FrameMoveFlag") == true) {
view1.frame.origin.y = 0
}
}
Swift 3 code for Geiger answer
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()
}
If you don't want to manually work with appearing and disappearing of the keyboard, just use the UITableViewController and it will handle all text fields in the table view.
Check out my gist, I use a scrollView for my case, but it works for any kind of view, you only have to remove the scrollView part and replace it with your view.
The gist is very well commented so you will also understand how this case is handled.
https://gist.github.com/Sjahriyar/916e93153a29dc602b45f29d39182352
I created KeyboardController to handle the keyboard issue. All that needs to be done is call setUpKeyBoardListeners() and set the lastElement as whatever the last element in your view is.
Gist: https://gist.github.com/espitia/ef830cf677fa1bc33ffdf16ac12d0204