Request for Tutorial on how to make an NSTimer run in the background (multitasking)

[TGDrakaRG]

Could anyone post some sample code, or write a tutorial on how to make an NSTimer keep on running when the app that contains it is in the background?
The Apple documentation is limited/non-existant. I think it involves: beginBackgroundTaskWithExpirationHandler, but I haven't successfully used it to make an app where the NSTimer keeps running when in the background.

Help please!

[franzwarning]

agreed.

[dineshkumarm12]

Originally Posted by TGDrakaRG

Could anyone post some sample code, or write a tutorial on how to make an NSTimer keep on running when the app that contains it is in the background?
The Apple documentation is limited/non-existant. I think it involves: beginBackgroundTaskWithExpirationHandler, but I haven't successfully used it to make an app where the NSTimer keeps running when in the background.

Help please!

have u found the answer for your query,I have the same issue,If u know please post here.....It will be great helpfull

[Rober1337]

We should make a club of people who really want/need to learn this... I could be president.

[aziz]

Please please any one ???
I will pay to get a sample code or Tutorial !!! $$$
7.5 Days of searching !!!!!
I need it for Getting GPS location.

[aziz]

Hi again ,,,

in AppDelegate.h add:

UIBackgroundTaskIdentifier bgTask;
BOOL inBackground;

in AppDelegate.m:

- (void)applicationDidEnterBackground:(UIApplication *)application {
	
	inBackground=YES;
	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), ^{
		while (inBackground == YES) {
			
			  // check lat and lon 
                          // if its what you want call the local Notification
                           
			[NSThread sleepForTimeInterval:(10*60)];
		}
		

        [app endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    });
}

in applicationWillEnterForeground:

inBackground = NO;

I think apple will throw this code in my face, but this is the only way i could manage this.

please any suggestions ??

[flashharry]

//add these two functions. The clock will stay in time even when the app is in the background!
int running;
int startTime;
int timerNow;
NSTimer *timer;

-(void) start{
startTime=[[NSDate date] timeIntervalSince1970];
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(startTimer) userInfo:nil repeats:YES];

}



-(void)startTimer{

running = [[NSDate date] timeIntervalSince1970];

timerNow = running-startTime;
NSLog(@"running %i:",timerNow);
}
- (void)viewDidLoad
{
[self start];
[super viewDidLoad];
}