Is there way to limit MKMapView maximum zoom level?

Question

the question is - is there a way to limit maximum zoom level for MKMapView? Or is there a way to track when user zooms to the level where there's no map image available?

Answer 1

If you're working with iOS 7+ only, there's a new camera.altitude property that you can get/set to enforce a zoom level. Its equivalent to azdev's solution, but no external code is required.

In testing, I also discovered that it was possible to enter an infinite loop if you repeatedly tried to zoom in at detail, so I have a var to prevent that in my code below.

- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {     // enforce maximum zoom level     if (_mapView.camera.altitude < 120.00 && !_modifyingMap) {         _modifyingMap = YES; // prevents strange infinite loop case          _mapView.camera.altitude = 120.00;          _modifyingMap = NO;     } } 

Answer 2

You could use the mapView:regionWillChangeAnimated: delegate method to listen for region change events, and if the region is wider than your maximum region, set it back to the max region with setRegion:animated: to indicate to your user that they can't zoom out that far. Here's the methods:

- (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated - (void)setRegion:(MKCoordinateRegion)region animated:(BOOL)animated