Dismissing UIAlertViews when entering background state

Question

Apple recommends dismissing any UIAlertViews/UIActionSheets when entering background state in iOS 4. This is to avoid any confusion on the user\'s part when he

Answer 1

As someone mentioned in a comment: the accepted answer isn't the best/cleanest one since iOS 4.0 when we have blocks! Here's how I do it:

UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Alert!" message:@"This alert will dismiss when application resigns active!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationWillResignActiveNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification* notification){
        [alert dismissWithClickedButtonIndex:0 animated:NO];
    }];