Detecting a change to text in UITextfield

Question

I would like to be able to detect if some text is changed in a UITextField so that I can then enable a UIButton to save the changes.

Answer 1

Swift 3.0

Process 1

Create IBOutlet of UITextfiled and Add Target to text field.

 m_lblTxt.addTarget(self, action: #selector(self.textFieldDidChange), for: UIControlEvents.editingChanged)

 func textFieldDidChange(textField:UITextField)
 {
     NSLog(textField.text!)
 }

Process 2

 m_lblTxt.delegate = self

 //MARK: - TextField Delegates
 func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool 
 {
      print(textField.text!)
      return true
 }