title: MKAnnotationView custom image is not shown
body: <p>I am trying to add a custom image instead of the regular pin on the map. But it remains a red pin... What am I missing? </p>
  
  <pre><code>- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id &lt;MKAnnotation&gt;) annotation{  
      static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
      MKPinAnnotationView *annView = [[MKPinAnnotationView alloc]     initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier];
      annView.animatesDrop = TRUE;
      annView.image = [UIImage imageNamed:@"CustomPin.png"];
      return annView;
  }
  </code></pre>