Text change notification for an NSTextField

Question

I would like to use the code from the answer to this question: How to observe the value of an NSTextField on an NSTextField in order to observe changes on the string stored

Answer 1

Xcode 9.2. with Swift 4.0.3.

The NSTextField must be connected via interface builder for this implementation to work.

import Cocoa

@objc public class MyWindowController: NSWindowController, NSTextFieldDelegate {

@IBOutlet weak var myTextField: NSTextField!

// MARK: - ViewController lifecycle -

override public func windowDidLoad() {
    super.windowDidLoad()
    myTextField.delegate = self
}

// MARK: - NSTextFieldDelegate -

public override func controlTextDidChange(_ obj: Notification) {
    // check the identifier to be sure you have the correct textfield if more are used 
    if let textField = obj.object as? NSTextField, self.myTextField.identifier == textField.identifier {
        print("\n\nMy own textField = \(self.myTextField)\nNotification textfield = \(textField)")
        print("\nChanged text = \(textField.stringValue)\n")
    }
}

}

Console output:

My own textField = Optional()
Notification textfield = 

Changed text = asdasdasddsada