Application Background Task For long term timers

Hi,
For to keep a long term timer in ios you cannot rely on default NSTimers or else.When the application goes in background you have to create a background execution task.
Within this task you should create a NSTimer with a scheduled timetick. (maybe set if for an hour later etc)

then when the timer executes stop the background task and do your business methods.

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    UIApplication* app = [UIApplication sharedApplication];

    bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
        [app endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];

    // Start the long-running task and return immediately.
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        // Do the work associated with the task.
        [self startTimer];  //Set nstimer..... scheduled one.
        [app endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    });
}

Cagdas