Unlock zooming after scrolling in maps
===

I have these two methods that I use to lock onto the user's location in Maps, and it works perfectly...

However, I guess it works too well lol, whenever I the user moves the map to look else where on the map... It forces the user back to the spot were the current location is at. 

So I guess my question is, how can i disable the lock to user location, after the user scrolls in the map.

    - (void)viewDidLoad {

         // more code here that i didn't post

         [self.mapView.userLocation addObserver:self 
                                forKeyPath:@"location" 
                           options:(NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld) 
                           context:NULL];
        }



    - (void)observeValueForKeyPath:(NSString *)keyPath  
                      ofObject:(id)object  
                        change:(NSDictionary *)change  
                       context:(void *)context {  
    
        if ([self.mapView showsUserLocation]) {  
        
        MKCoordinateRegion region;
        region.center = self.mapView.userLocation.coordinate;  
        
        MKCoordinateSpan span; 
        span.latitudeDelta  = 1; // Change these values to change the zoom
        span.longitudeDelta = 1; 
        region.span = span;
        
        [self.mapView setRegion:region animated:YES];
       }
    }