Incorrect height of iPad floating keyboard

Question

DaleOne OP

Created Jul ’21

Replies 1

Boosts 1

Views 1.2k

Participants 2

I'm using the following code to get the height of the keyboard:

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(keyboardHeight),
            name: UIResponder.keyboardDidChangeFrameNotification,
            object: nil
        )
    }

    @objc private func keyboardHeight(notification: Notification) {
        guard let keyboardRect = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else { return }

        print("==> keyboardFrameEndUserInfoKey height: \(keyboardRect.size.height)")

    }
}

This code on iPad work correctly when the keyboard is normal but it does not work when the keyboard is floating.

After the user tap on a text field, the keyboard appear and the keyboardDidChangeFrameNotification notification is called.

If the keyboard is floating then the first time we get a wrong height of 362. If the user then manually move somewhere the floating keyboard the notification is called again and the correct value of 308 is returned.

It is a bug or I miss something? I need to be able to get the correct height the first time the keyboard appear.

This is happening on iOS 13 and iOS 14.

Any idea?

Boost

Answer 1

Claude31 OP

Jul ’21

That seems to be an old issue with keyboard size.

I filed a bug, in 2018 (radar ID 38117524 - FB5721145) for keyboard size issues.

Here's an abstract:

Value for keyboard height returned by

 note.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue

is erroneous after turning iPad from Portrait to Landscape

This is for a numeric keypad on iPad (numbers at top, special characters below, help line at the top).
This occurs both on device and in Xcode simulator

Steps to Reproduce:

On iPad, select numeric keypad (numbers at top, special characters below, help line at the top), for a textField
In keyboardWillShow, get the keyboard size, and ask for printing it :

    @objc func keyboardWillShow(_ note : Notification) -> Void {  
          if let keyboardSize = (note.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {  
                    print("keyboardSize", keyboardSize)

Start in landscape,
click on field to show keyboard,
then turn portrait then return landscape, the keyboard staying displayed on screen.

Expected Results:

Height should be 398 when returning to landscape
Actual Results:

Height is 142 after returning to landscape.
keyboardSize (0.0, 768.0, 1024.0, 398.0)     // Landscape, seems correct
keyboardSize (0.0, 1024.0, 768.0, 313.0)     // Portrait, effectively smaller in height
keyboardSize (0.0, 768.0, 1024.0, 142.0)     // Return to landscape: height is now clearly wrong
keyboardSize (0.0, 626.0, 1024.0, 142.0)     // Note: keyboardWillShow is called a second time and removes 142.0 from origin.y.

Version/Build: IOS 11.2.5 (15D100) Xcode Version 9.2 beta (9C34b) OSX Version 10.13.3 (17D102)

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