iPhone X keyboard appear showing extra space

Question

I have created a chat UI in which I have added a constraint for the tableView to the bottom of the screen. I am changing the constraint value by ad

Answer 1

The keyboard value reported by UIKeyboardFrameBeginUserInfoKey is different in these two cases in iPhone X:

• Keyboard was not visible, a text field becomes first responder
• Keyboard was already visible, a different text field becomes first responder.

To get the final height of the keyboard of the keyboard (including the safe area insets) use UIKeyboardFrameEndUserInfoKey.

In iOS 11 (iPhone X particularly), you may consider subtracting the safe area bottom insets.

    NSValue *keyboardEndFrameValue = notification.userInfo[UIKeyboardFrameEndUserInfoKey];
    if (keyboardEndFrameValue != nil) {
        CGRect keyboardSize = [keyboardEndFrameValue CGRectValue];
        _keyboardHeight = keyboardSize.size.height;
        if (@available(iOS 11.0, *)) {
            CGFloat bottomSafeAreaInset = self.view.safeAreaInsets.bottom;
            _keyboardHeight -= bottomSafeAreaInset;
        } else {
            // Fallback on earlier versions
        }
    }