Move view with keyboard using Swift

Question

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.

Answer 1

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     } } 

Answer 2

Easiest way that doesn't even require any code:

1. Download KeyboardLayoutConstraint.swift and add (drag & drop) the file into your project, if you're not using the Spring animation framework already.
2. 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.
3. Done!

The object will auto-move up with the keyboard, in sync.