title: MKMapView, animateDrop?
body: <p>I have setup an NSMutableArray of objects derived from a class that conforms to the MKAnnotation protocol. I have setup setup title and subtitle for the annotation and have successfully added them to the MKMapView using:</p>
  
  <pre><code>[[self customMapView] addAnnotations:locationArray];
  </code></pre>
  
  <p>What I want to do now is animate the pins dropping, initially I thought I could do that with <strong>Option1</strong>, using this everything works, but the pins don't do an animated drop. </p>
  
  <pre><code>// Option1
  // WORKS FOR: pinColor YES, animatesDrop NO, LABEL YES
  - (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views {
      for(MKPinAnnotationView *eachView in views) {
          [eachView setAnimatesDrop:YES];
          [eachView setPinColor:MKPinAnnotationColorPurple];
      }
  }
  </code></pre>
  
  <p>My next guess was to try <strong>Option2</strong>, this seems to work very well but I have two issues. The title and subtitle don't show up, my custom annotation object is getting passed in (I can see it in the debugger) but the information contained is not making it across to the new <code>pin</code>. Secondly this creates a new set of MKAnnotationViews, what happens to the old ones, are there and issues with memory leaks?</p>
  
  <pre><code>// Option2
  //FOR: pinColor YES, animatesDrop YES, LABEL NO
  - (MKAnnotationView *) mapView: (MKMapView *) mapView viewForAnnotation: (id&lt;MKAnnotation&gt;) annotation {
      MKPinAnnotationView *pin = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier: @"annotation_ID"];
      if (pin == nil) {
          pin = [[[MKPinAnnotationView alloc] initWithAnnotation: annotation reuseIdentifier: @"annotation_ID"] autorelease];
      } else {
          pin.annotation = annotation;
      }
      pin.pinColor = MKPinAnnotationColorRed;
      pin.animatesDrop = YES;
      return pin;
  }
  </code></pre>
  
  <p>EDIT: I have solved the missing title &amp; subTitle by adding <code>pin.canShowCallout = YES;</code></p>