How to make UITextField move up when keyboard is present? - ios

Question

How do I prevent a UITextField from being hidden by the keyboard?

Answer 1

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)
}

Answer 2

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()
}

Answer 3

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.

Answer 4

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)
}

Answer 5

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
}

Answer 6

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)
}

Answer 7

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

Answer 8

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
}

Answer 9

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
}
}

Answer 10

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()
}

Answer 11

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.

Answer 12

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

Answer 13

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