How to reliably get keyboard height in iOS Swift?

Question

I have this code to detect when keyboard is shown and get its height.

@objc func keyboardWasShown (_ notification: Notification) {
    let keyboardSize = (notification.userInfo![UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue.size;
    print ("KEYBOARD SIZE: \(keyboardSize.height)");
}

At first, when I first time tap on a UITextView to make it first responder, the console showed 271.0 point.

Then I tap on the view to dismiss the keyboard. And then I tap again on the UITextView. Now it's showing 226.0 point.

There's no change to the keyboard layout on the first and subsequent trial. At first I always get 271, and then the next are always 226. The correct one is 271.

Why is this happening? And how to fix it?

@Scriptable yes, I have mentioned this in the answer I post by myself below. — Chen Li Yong, Jul 03 '18 at 06:06

score 6 · Answer 1 · answered Jul 02 '18 at 09:50

6

From is answer, I found that I'm supposed to use UIKeyboardFrameEndUserInfoKey instead of UIKeyboardFrameBeginUserInfoKey.

answered Jul 02 '18 at 09:50

Chen Li Yong

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This should be the right answer, not the recommendations of IQKeyboardManager – Abel7x Jul 10 '19 at 15:08

Devil Decoder · Answer 2 · 2019-10-10T10:06:41.807

you can get frame of keyboard by

override func viewDidLoad() {
    super.viewDidLoad()
    let center = NotificationCenter.default
    center.addObserver(self, selector: #selector(keyBoardDidShow(_:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
    // Do any additional setup after loading the view.
}
override func viewDidDisappear(_ animated: Bool) {
    let center = NotificationCenter.default
    center.removeObserver(self, name: NSNotification.Name.UIKeyboardDidShow, object: nil)
}



func keyBoardDidShow(_ notification:Notification)
{
    print((notification.userInfo?["UIKeyboardBoundsUserInfoKey"] as! CGRect).height)
}

score 0 · Answer 3 · answered Jul 02 '18 at 09:51

0

Just import this library into your project. It will handle each and everything automatically.

answered Jul 02 '18 at 09:51

aBilal17

2,974
2
17
23

score -1 · Accepted Answer · answered Jul 02 '18 at 09:47

-1

don't know your exact scenario but try to use IQKeyboard it will deal with all your problems.

answered Jul 02 '18 at 09:47

Syed faizan ali

46
4

Thanks for the info! – Chen Li Yong Jul 02 '18 at 09:50
your most welcome! – Syed faizan ali Jul 02 '18 at 09:53
1

Please give definitive answers, no suggestions or recommendations. This answer should probably be in the comments. – badhanganesh Jul 02 '18 at 10:00
@BadhanGanesh this actually solves all my current and future problems with iOS keyboard. – Chen Li Yong Feb 21 '19 at 02:30

How to reliably get keyboard height in iOS Swift?

4 Answers4