title: IOS: MKPinAnnotationView animated drop don't work
body: <p>I have this code to delete and add a new pin in my map:</p>
  
  <pre><code>- (IBAction)setLocation:(id)sender{
  
      NSMutableArray *toRemove = [NSMutableArray arrayWithCapacity:1];
      for (id annotation in map.annotations)
          if (annotation != map.userLocation)
              [toRemove addObject:annotation];
      [map removeAnnotations:toRemove];
  
  
      MKPointAnnotation *annotationPoint = [[[MKPointAnnotation alloc] init]autorelease];
      annotationPoint.coordinate = map.userLocation.coordinate;
      annotationPoint.title = @"Position";
      [map addAnnotation:annotationPoint];
  
      MKPinAnnotationView *pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotationPoint reuseIdentifier:@"Pin"] autorelease];
      pinView.pinColor = MKPinAnnotationColorRed;
      pinView.canShowCallout = YES;
      //pinView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
      pinView.animatesDrop = TRUE;
  
  
  }
  </code></pre>
  
  <p>but I set my pin it don't do animation but I set animatesDrop = true, why?</p>