Detect if iPhone screen is on/off

Question

Is there any way to detect if an iPhone\'s screen is on or off? For example, when the phone\'s screen lock button is pressed.

I\'ve been using (void)applicationWi

Answer 1

Yes, there is no definitive method. UIApplication has a property protectedDataAvailable which will return YES when screen is unlocked and NO if locked only when user enables content protection. So this is the closest but unreliable I can think of. In such case, you can even listen to UIApplicationProtectedDataDidBecomeAvailable and UIApplicationProtectedDataWillBecomeUnavailable notifications.