CODEWITHSUNDEEP
iosobjective-c
Resh32
Resh32

Reputation: 6590

Spurious UIApplicationDidBecomeActiveNotification notification

I am able to register for UIApplicationDidBecomeActiveNotification and properly receive events. But sometimes I receive these notifications WHILE the app is still running. I suspected memory problems to trigger an app resign/resume but could not confirm this was the case (I saw once a memory warning at the same time). Any reason why these methods would be called while the app is running (no call, no lock, etc.)?

I am registering for these notifications:

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActiveNotif:) name:UIApplicationDidBecomeActiveNotification object:nil];
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillResignActiveNotif:) name:UIApplicationWillResignActiveNotification object:nil];

(This is done once in a singleton constructor using dispatch_once)

The corresponding functions:

-(void)appDidBecomeActiveNotif:(NSNotification*)notif
{
  NSLog(@"appDidBecomeActiveNotif called");
}

-(void)appWillResignActiveNotif:(NSNotification*)notif
{   
  NSLog(@"appWillResignActiveNotif called");
}

Here are some logs:

2013-04-11 09:28:11.401 App[1499:907] appWillResignActiveNotif
2013-04-11 09:28:13.505 App[1499:907] appDidBecomeActiveNotif

Upvotes: 1

Views: 1108

Answers (1)

Odrakir
Odrakir

Reputation: 4254

This is what the docs says about those notifications:

UIApplicationDidBecomeActiveNotification Posted when the application becomes active. An application is active when it is receiving events. An active application can be said to have focus. It gains focus after being launched, loses focus when an overlay window pops up or when the device is locked, and gains focus when the device is unlocked.

UIApplicationWillResignActiveNotification Posted when the application is no longer active and loses focus. An application is active when it is receiving events. An active application can be said to have focus. It gains focus after being launched, loses focus when an overlay window pops up or when the device is locked, and gains focus when the device is unlocked.

So, are there any overlay window pop ups or are you locking the device or anything like that?

Also, why not use the methods in the AppDelegate to listen to those events?

EDIT

The problem, it seems, is MapKit's pop up asking the user to use it's location.

Upvotes: 1

Related Questions