UIKeyboardWillChangeFrame Notification not called with emoji keyboard

问题

First I had a UIViewController listenning for the UIKeyboardWillShow notification to adjust the screen for the keyboard. But every time I changed to emoji keyboard, the notification wasn't called.

So, I changed to UIKeyboardWillChangeFrame notification like this

NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardChanged(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)

It seems to work fine if I just change to emoji by tapping keyboard type.

However, if I press and hold keyboard type to select (my keyboard have more than one language) and select the emoji keyboard, the notification is not fired.

Anyone had something like this before? Any suggestions?

回答1:

This is a bug in iOS 11, but there is a hacky temporary solution:

You can listen language mode changes:

NotificationCenter.default.addObserver(self, selector: #selector(inputModeDidChange(_:)), name: .UITextInputCurrentInputModeDidChange, object: nil)

And check for emoji:

if([[UITextInputMode currentInputMode].primaryLanguage isEqualToString:@"emoji"]) // layout again

来源：https://stackoverflow.com/questions/46287136/uikeyboardwillchangeframe-notification-not-called-with-emoji-keyboard