What is the callback function when app unlock from lock screen to my app screen in iOS?

Question

I thought it was viewWillAppear function, but it did not.

Is not exist unlock callback function in iOS?

Answer 1

The methods called when locking the device with your app currently in foreground are in order

-[MyAppDelegate applicationWillResignActive:]
-[MyAppDelegate applicationDidEnterBackground:]
-[MyAppDelegate applicationWillEnterForeground:]
-[MyAppDelegate applicationDidBecomeActive:]

The first two are called when locking, the others when unlocking