Question

I have read carefully the apple dev user guide re multitasking but i still can’t understand how i can run a simple operation while on background. I did the following simple experiment but nothing happened:

- (void)applicationDidEnterBackground:(UIApplication *)application
{
   sleep(3);
   UIAlertView *alert1 = [[UIAlertView alloc] initWithTitle:@"title" message:@"test" delegate:nil cancelButtonTitle:nil otherButtonTitles:nil , nil];
   [alert1 show];
}

So I understand that adding support for audio/location/VoIP operations while in background in given by default, but how can I add support for such a simple operation?

Thanks a lot for the help.

Answer 1

I Hope this ans. is very Useful for Your Problem

When you close Application than you can see in background the message in AlertView..

- (void)viewDidLoad

{


UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    localNotif.fireDate =[NSDate dateWithTimeIntervalSinceNow:15];
    localNotif.timeZone = [NSTimeZone localTimeZone];
    localNotif.alertBody = @"Staff meeting in 30 minutes";
    //localNotif.alertBody = [NSString stringWithFormat:@"%@'s Birthday",strName];

    localNotif.alertAction = @"View";
    localNotif.soundName = UILocalNotificationDefaultSoundName;
    //    localNotif.applicationIconBadgeNumber = 1;
    localNotif.repeatInterval = NSYearCalendarUnit;

    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];


}