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notify view controller when application becomes active

/ Published in: Objective C
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  1. //add this when initializing controller
  2. [[NSNotificationCenter defaultCenter] addObserver:self 
  3.     selector:@selector(becomeActive:)
  4.     name:UIApplicationDidBecomeActiveNotification
  5.     object:nil];
  6.  
  7. //add the actual method in the controller
  8.  
  9. - (void)becomeActive:(NSNotification *)notification {
  10.     NSLog(@"becoming active");
  11. }
  12.  
  13. //be sure to clean up the notification
  14.  
  15. - (void)dealloc {
  16.     [[NSNotificationCenter defaultCenter] removeObserver:self];
  17.     [super dealloc];
  18. }

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