ios - Should I remove observer in applicationWillTerminate? -

I added this code in your AppDelegate.h file:

  - (bool) application : (UIApplication *) application didFinishLaunchingWithOptions: (NSDictionary *) launchOptions {[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector (saveDataAndSettings) name: UIApplicationDidEnterBackgroundNotification object: nil]; }  

I usually write it:

  - (void) dealloc {[[NSNotificationCenter defaultCenter] removeObserver: self]; }  

If I have set the UIViewController classes to be the supervisor (non-ARC).

While I'm thinking, if I do AppDelegate, I still insert a line:

  [[NSNotificationCenter defaultCenter] Htayenobsrhwar: self]; ApplicationWillTerminate in  

? Method

Because applications will be eliminated,

Thanks in advance for it means that it dealloc or either more cleaning There is no need to, or