UITextField text change event

Question

How can I detect any text changes in a textField? The delegate method shouldChangeCharactersInRange works for something, but it did not fulfill my need exactly.

Answer 1

Swift 4

func addNotificationObservers() {

    NotificationCenter.default.addObserver(self, selector: #selector(textFieldDidChangeAction(_:)), name: .UITextFieldTextDidChange, object: nil)

}

@objc func textFieldDidChangeAction(_ notification: NSNotification) {

    let textField = notification.object as! UITextField
    print(textField.text!)

}