title: double tap and zoom on google map ios
body: <p>There are two  delegate methods that telling map region is changed:  </p>
  
  <pre><code>- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated  
  - (void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated  
  </code></pre>
  
  <p>My question is: 
  Is there a way to detect the map region is changed from double tap or zooming?</p>