Correct realisation of didUpdateToLocations and get locality

gistfile1.m

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *newLocation = locations.lastObject;
    
    NSTimeInterval locationAge = -[newLocation.timestamp timeIntervalSinceNow];
    if (locationAge > 5.0) return;
    
    if (newLocation.horizontalAccuracy < 0) return;
    
	// Needed to filter cached and too old locations
    //NSLog(@"Location updated to = %@", newLocation);
    CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:_currentLocation.coordinate.latitude longitude:_currentLocation.coordinate.longitude];
    CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:newLocation.coordinate.latitude longitude:newLocation.coordinate.longitude];
    double distance = [loc1 distanceFromLocation:loc2];
    _currentLocation = newLocation;
    
    if(distance > 20)
    {
        NSLog(@"SIGNIFICANTSHIFT");
        
        //[self getLocality];
        
    }
    
    [[NSNotificationCenter defaultCenter] postNotificationName:DKALocationUpdated object:self userInfo:nil];
    
}

-(void)getLocality
{
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder reverseGeocodeLocation:[[CLLocation alloc] initWithLatitude:_currentLocation.coordinate.latitude longitude:_currentLocation.coordinate.longitude] completionHandler:^(NSArray *placemarks, NSError *error) {
        if (error == nil) {
            
            NSLog(@"%@", [NSString stringWithFormat:@"%@,%@", [[placemarks objectAtIndex:0] locality], [[placemarks objectAtIndex:0] country]]);
            _placemark = [placemarks objectAtIndex:0];
            NSLog(@"%@, %@, %@, %@, %@", [_placemark.addressDictionary objectForKey:@"CountryCode"], [_placemark.addressDictionary objectForKey:@"Country"], [_placemark.addressDictionary objectForKey:@"City"],_placemark.addressDictionary, _placemark);
            //self.location.address = ABCreateStringWithAddressDictionary([[placemarks objectAtIndex:0] addressDictionary], NO);
            
            
        }
        
        [[NSNotificationCenter defaultCenter] postNotificationName:DKALocationMuchUpdated object:self userInfo:nil];
        
        //[MBProgressHUD hideAllHUDsForView:self.view animated:YES];
        
    }];
}