iOS update location even when app is terminated

Question

I'm trying to update users location even when app is terminated. I added maps, and background mode --> Location update to my .plist, and I set an local notification that will fire when location is updated. But it never got fired. I have this in AppDelegat.h:

@interface AppDelegate : UIResponder <CLLocationManagerDelegate>{
    CLLocationManager *locationManager;
}

and in AppDelegate.m

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

    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    [locationManager requestAlwaysAuthorization];
    [locationManager startMonitoringSignificantLocationChanges];
}

---

    - (void)locationManager:(CLLocationManager *)manager 
    didUpdateLocations:(NSArray *)locations {

 UILocalNotification *notification = [[UILocalNotification alloc]init];
notification.repeatInterval = NSDayCalendarUnit;
[notification setAlertBody:@"Location update!"];
[notification setFireDate:[NSDate dateWithTimeIntervalSinceNow:1]];
[notification setTimeZone:[NSTimeZone  defaultTimeZone]];
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
    }

I tested this code on simulator with Freeway drive as location and it doesn't work.

---

EDIT

If I put the code under applicationDidEnterBackground authorization request will close the second it's opened, because I'm using didFinishLaunchingWithOptions. I know it's tracking location 24h because there's GPS symbol even when app is terminated.

---

EDIT 2

After testing it on my phone the code works. It wakes terminated app and sends local notification. It doesn't work on simulator but works in real life(device) :)

Answer 1

It looks like you're using CLLocationManagerDelegate's deprecated function:

-(void)locationManager:(CLLocationManager *)manager 
        didUpdateToLocation:(CLLocation *)newLocation 
        fromLocation:(CLLocation *)oldLocation { 
}

Instead you should implement

- (void)locationManager:(CLLocationManager *)manager 
    didUpdateLocations:(NSArray *)locations {
}