iosswiftaccessibilitynotificationcenter

How to observe 'boldTextStatusDidChangeNotification' using default notification center in Swift 5

I'm trying to have observe running constantly in the app background which will trigger custom action if Accessibility Bold Text feature has been enabled via Mobile Device Settings.

My understanding is I need to add observe to the default notification center and the name of the notification is 'boldTextStatusDidChangeNotification'.

Can someone advice on the code sample for this?

Solution

  • You can check the state of many accessibility options thanks to a bunch of events provided by the system.

    Add an observer as follows:

    NotificationCenter.default.addObserver(self,
                                       selector: #selector(methodToBeCalled(notification:)),
                                       name: UIAccessibility.boldTextStatusDidChangeNotification,
                                       object: nil)

    ... and create the method to be fired when the appropriate event occurs:

    @objc private func methodToBeCalled(notification: Notification) {
    //Create your actions here.
}

    If you want further information or check a complete list of these events with code snippets, I suggest to take a look at this site. 👍