Отображение локальных уведомлений с помощью диспетчера местоположений, пока приложение находится в фоновом режиме

Это может помочь. Эта логика предназначена для того, чтобы ваше уведомление срабатывало только один раз и чтобы одно и то же предупреждение отображалось независимо от того, находится ли приложение на переднем плане или в фоновом режиме, когда оно срабатывает.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    // Add the view controller's view to the window and display.
    [self.window addSubview:viewController.view];
    [self.window makeKeyAndVisible];

    //detect if app was launched by notification
    UILocalNotification *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
    if (notification)
    {
        //trigger our custom notification handler
        [self handleLocalNotification:notification];
    }

    return YES;
}

- (void)handleLocalNotification:(UILocalNotification *)notification
{
    //this is our custom method to handle the in-app notification behaviour
    [[[[UIAlertView alloc] initWithTitle:@"You have a notification"
                                 message:@"Yay!"
                                delegate:nil
                       cancelButtonTitle:@"OK"
                       otherButtonTitles:nil] autorelease] show];
}

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
    //this standard application delegate method is called under the following circumstances
    //1. the app is running in the foreground when the notification fires
    //2. the app was running in the background when the notification fired, and the user pressed the action button
    //confusingly, if the app was not running when the notification fired, this method won't be called at startup
    //automatically and you need to check for the notification key in the launch options instead

    if ([UIApplication sharedApplication].applicationState != UIApplicationStateBackground)
    {
        //this code emulates the same behaviour as when a local notification is received
        //when the app is not running (except for playing the sound)

        //store notification temporarily
        [lastNotification release];
        lastNotification = [notification retain];

        //get button labels
        NSString *actionButton = nil;
        NSString *cancelButton = @"Close";
        if (notification.hasAction)
        {
            actionButton = (notification.alertAction)? notification.alertAction: @"View"; //defaults to "View" if nil
            cancelButton = @"OK";
        }

        //show alert
        [[[[UIAlertView alloc] initWithTitle:[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleDisplayName"] //name of application
                                     message:notification.alertBody
                                    delegate:self
                           cancelButtonTitle:cancelButton
                           otherButtonTitles:actionButton, nil] autorelease] show];
    }
    else
    {
        //trigger our custom notification handler
        [self handleLocalNotification:notification];
    }
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex != alertView.cancelButtonIndex)
    {
        //trigger our custom notification handler
        [self handleLocalNotification:lastNotification];
    }
}