TextFieldListenToEvents

ListenEventSubClassingUITextField.swift

private func setup() {
    self.addTarget(self, action: #selector(beginEditing), for: UIControl.Event.editingDidBegin)
    self.addTarget(self, action: #selector(textDidChange), for: UIControl.Event.editingChanged)
    self.addTarget(self, action: #selector(textEndEditing), for: UIControl.Event.editingDidEnd)
  }
  
  @objc func beginEditing() {
    print(#function)
  }
  
  @objc func textEndEditing() {
    print(#function)
  }
  
  @objc func textDidChange() {
    print(#function)
  }