to run app continously in the background

Question

Hi

I want to run my app keep running in the background with location services. For this I have used:

*

  (void)applicationDidEnterBackground:(UIApplication *)application {

  [locationManager stopUpdatingLocation];

  [locationManager startUpdatingLocation];

  //timer=[NSTimer scheduledTimerWithTimeInterval:300 target:self selector:@selector(UpdateLocation) userInfo:nil repeats:YES];

}

but when i user timer,it does not call UpdateLocation. I called it using another method but then also it is called only once.

I want to run app continously in the background, detecting locations after regular interval of time.

Can any one please suggest any idea?

thanks in advance