IOS what method is called when keyboard pops up

Question

I am making a custom IOS keyboard. I was wondering if there is any method that is called whenever the user selects the keyboard, thus making it pop up on screen. This is because I want to run some code whenever the keyboard pops up.

Answer 1

No method is called. A notification is posted though. You can read more about it in the Managing the Keyboard section of the Text Programming Guide for iOS .

Answer 2

The notification: UIKeyboardDidShowNotification is called. You can create an observer to this method that triggers a function for both actions like this:

NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardDidShow:"), name:UIKeyboardWillShowNotification, object: nil)

NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardDidHide:"), name:UIKeyboardWillHideNotification, object: nil)


func keyboardDidShow(notification: NSNotification) {
  print("Keyboard shown")
}

func keyboardDidHide(notification: NSNotification) {
  print("Keyboard hidden")
}