How to handle NSTextField change in macOS

Issue #438

Storyboard

In Storyboard, NSTextField has an Action option that specify whether Send onSend on Enter only` should be the default behaviour.

Code

In code, NSTextFieldDelegate notifies whenever text field value changes, and target action notifies when Enter key is pressed

import Cocoa

class ViewController: NSViewController, NSTextFieldDelegate {
    
    @IBOutlet weak var textField: NSTextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        textField.delegate = self
    }
    
    func controlTextDidChange(_ obj: Notification) {
        let textField = obj.object as! NSTextField
        print(textField.stringValue)
    }
}

Use EasyClosure

If we use EasyClosure then this is easy

let textField: NSTextField = 

textField.on.action { string in
    print("User has pressed enter \(string)"
}

textField.on.change { string in
    print("Text field value has changed")
}

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Updated at 2020-11-27 07:39:43