title: Will iOS wake up the terminated app if it's registered with location for UIBackgroundModes?
body: <p>I know that if an app uses "The significant-change location service", iOS will wake it up if there's a location update to be delivered, even if the app is terminated.</p>
  
  <p>I couldn't find a clear answer about the case if the app is using standard location services and specifies location as the key for UIBackgroundModes: Will iOS also wake it up to deliver the update even if it's terminated? Or does the app need to be running in the background to get the location update callback?</p>
  
  <p><strong>UPDATE:</strong> At the time I was asking this, I didn't have the time to test it. But after I got an answer here, I wrote this piece of code in my application's delegate to see if my terminated app will be relaunched when it gets a location update. I'm displaying a UILocalNotification when I'm notified of the update. However, when I terminated my app and then changed my location in the city, the app was not relaunched and I didn't get any updates. Can you tell me what it's that I'm doing wrong? </p>
  
  <p><strong>UPDATE #2:</strong> According to the final findings in this Q&amp;A, there's nothing wrong with this code and it's the expected behaviour for an app that uses standard location services, not to be relaunched after termination.</p>
  
  <p>I've added location as one of the UIBackgroundModes in the Info.plist file. </p>
  
  <p>And this is the location related parts of my app delegate:</p>
  
  <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
  
      [UIApplication sharedApplication].applicationIconBadgeNumber = 0;
  
      m_locManager = [[CLLocationManager alloc] init];
      m_locManager.delegate = self;
      [m_locManager startUpdatingLocation];
      return YES;
  }
  
  - (void)applicationDidEnterBackground:(UIApplication *)application {
      [m_locManager startUpdatingLocation];
  }
  
  - (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
  {
      NSLog("%@", [NSString stringWithFormat:@"Background Fail %@", [error localizedDescription]]);
  }
  
  - (void)locationManager:(CLLocationManager *)manager
      didUpdateToLocation:(CLLocation *)newLocation
             fromLocation:(CLLocation *)oldLocation
  {
      UILocalNotification * theNotification = [[UILocalNotification alloc] init];
      theNotification.alertBody = [NSString stringWithFormat:@"Background location %.06f %.06f %@" , newLocation.coordinate.latitude, newLocation.coordinate.longitude, newLocation.timestamp];
      theNotification.alertAction = @"Ok";
  
      theNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:1];
  
      [[UIApplication sharedApplication] scheduleLocalNotification:theNotification];
  }
  </code></pre>