iOS11 not taking constraints correctly

Question

I have an app on the store, in order to support all devices and keyboard I am changing the bottom constraint height according to keyboard height. It is working on all iOS ve

Answer 1

Swift

Use IHKeyboardAvoiding

Step 1) pod 'IHKeyboardAvoiding'

Step 2) Copy the following code

 import IHKeyboardAvoiding

  override func viewDidAppear(_ animated: Bool) {
    KeyboardAvoiding.avoidingView = Your_View
  }

Answer 2

If you are using UIKeyboardWillShowNotification to get the keyboard height then change UIKeyboardFrameBeginUserInfoKey with UIKeyboardFrameEndUserInfoKey

UIKeyboardFrameBeginUserInfoKey returns 0 for keyboard rect height value in iOS 11. Changing it to UIKeyboardFrameEndUserInfoKey might solve this issue.

Objective-C

- (void)keyboardWasShown:(NSNotification*)aNotification {
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    //Change constraints
}

Swift 3

func keyboardWasShown(_ aNotification: Notification) {
    let info = aNotification.userInfo
    let kbSize: CGSize? = info?[UIKeyboardFrameEndUserInfoKey]?.cgRectValue?.size
    //Change constraints
}