CLLocationManager weird behavior - ios

Question

I have a weird problem.
I have 2 classes:
BusinessVC
FavoritesVC
In both of them i show the user the current distance from him to some specific point.
In both of the classes i use the EXACT same code for that.
FavoritesVC is presented as modal view controller.
For some reason didUpdateLocations / didUpdateToLocation methods are getting called ONLY in BusinessVC and NOT in FavoritesVC.
I'm implementing CLLocationManagerDelegate delegate in both classes.
The code I'm using:
-(void)viewDidLoad {
[super viewDidLoad];
[self locatedMe];
}
-(void) locatedMe{
NSLog(#"locateMe");
_locationManager = [[CLLocationManager alloc] init];
[_locationManager setDelegate:self];
[_locationManager setDistanceFilter:kCLDistanceFilterNone]; // whenever we move
[_locationManager setDesiredAccuracy:kCLLocationAccuracyHundredMeters]; // 100 m
[_locationManager startUpdatingLocation];
}
// For iOS6
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
CLLocation * newLocation = [locations lastObject];
NSNumber *lat = [[NSNumber alloc] initWithDouble:newLocation.coordinate.latitude];
NSNumber *lon = [[NSNumber alloc] initWithDouble:newLocation.coordinate.longitude];
self.userLocation = [[CLLocation alloc] initWithLatitude:[lat doubleValue] longitude:[lon doubleValue]];
}
// For earlier then iOS6
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
NSNumber *lat = [[NSNumber alloc] initWithDouble:newLocation.coordinate.latitude];
NSNumber *lon = [[NSNumber alloc] initWithDouble:newLocation.coordinate.longitude];
self.userLocation = [[CLLocation alloc] initWithLatitude:[lat doubleValue] longitude:[lon doubleValue]];
NSLog(#"%#",self.userLocation);
}

Answer 1

OK! Fixed that by running the code on main thread using this code:
-(void) locateMe {
NSLog(#"locateMe");
dispatch_async(dispatch_get_main_queue(), ^{
_locationManager = [[CLLocationManager alloc] init];
[_locationManager setDelegate:self];
[_locationManager setDesiredAccuracy:kCLLocationAccuracyBest]; // 100 m
[_locationManager startUpdatingLocation];
[_locationManager startUpdatingHeading];
});
}