Detect changes on NSUserDefaults

Question

I\'m developing an iOS application with latest SDK.

I want to know when a property on NSUserDefaults changes it value.

I have found this, but it

Answer 1

If you need to use this in a Swift 4 project you can use the following:

override func viewDidLoad() {
    super.viewDidLoad()
    NotificationCenter.default.addObserver(self, selector: #selector(defaultsChanged), name: UserDefaults.didChangeNotification, object: nil)
}

@objc func defaultsChanged() {
    // Your code
}