自定义键盘：文本更新时得到通知

Question

Is there a method in UIInputViewController when the text that the custom keyboard is modifying updates? textWillChange / textDidChange only notify me about cursor movement.

Answer 1

Subclass UIInputView . In your subclass, set up a protocol .

protocol MyCustomInputViewDidChangeDelegate {
    func customInputViewDidChange(customInputView: MyCustomInputView)
}

class MyCustomInputView: UIInputView {
    var delegate: MyCustomInputViewDidChangeDelegate?
}

You'll have UIInputViewController conform to MyCustomInputViewDidChangeDelegate When your custom keyboard is touched, propagate that to the delegate when appropriate by calling delegate?.customInputViewDidChange(self) .

Answer 2

there are UITextFieldTextDidBeginEditingNotification, UITextFieldTextDidEndEditingNotification, UITextFieldTextDidChangeNotification You can use

   NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(self.textFieldDidChanged(_:)),    name: UITextFieldTextDidEndEditingNotification, object:self.txtAlbumName)

   NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(self.textFieldDidChanged(_:)),    name: UITextFieldTextDidChangeNotification, object:self.txtAlbumName)
  // ------------

  func textFieldDidChanged(sender:NSNotification) -> Void {

  }

  func textFieldDidChanged (sender:NSNotification) -> Void{

  }
}