I have the UIApplicationDelegate
protocol in my main AppDelegate.m class, with the applicationDidBecomeActive
method defined.
I want to call a method when the application returns from the background, but the method is in another view controller. How can I check which view controller is currently showing in the applicationDidBecomeActive
method and then make a call to a method within that controller?
Best Answer
Any class in your application can become an "observer" for different notifications in the application. When you create (or load) your view controller, you'll want to register it as an observer for the
UIApplicationDidBecomeActiveNotification
and specify which method that you want to call when that notification gets sent to your application.Don't forget to clean up after yourself! Remember to remove yourself as the observer when your view is going away:
More information about the Notification Center.