title: Animations for a dropped pin not working
body: <p>When I drop a pin on my mkmapview the animation works fine and the pin drops from the top of the screen as expected. I color that pin red because I haven't verified it. However, if I verify the pin using some code that is called on calloutAccessoryControlTapped I change the color of the Pin  to green.</p>
  
  <p>When I next press on the map to drop another red pin the animation fails and the pin just appears. If I do it again (long press) a new pin appears and it's animation is fine. What could I have done to the annotation that causes this behavior.</p>
  
  <p>Thanks for any insights of what could have gone wrong here...
  Donie</p>
  
  <pre><code>- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id &lt;MKAnnotation&gt;)annotation 
  {
  
      if ([annotation isKindOfClass:[MKUserLocation class]]) 
      {
          return nil;     
      }
  
      static NSString * const kPinIdentifier = @"PinIdentifier";
      MKPinAnnotationView *draggablePinView = (MKPinAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:kPinIdentifier];
  
      if(!draggablePinView)
      {
          draggablePinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:kPinIdentifier] autorelease];
          draggablePinView.pinColor = MKPinAnnotationColorRed;
          draggablePinView.animatesDrop = YES;
          draggablePinView.canShowCallout = YES;
          draggablePinView.draggable = YES;
  
  
          UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
          draggablePinView.rightCalloutAccessoryView = rightButton;
      }
      else
      {
          draggablePinView.annotation = annotation;
          draggablePinView.animatesDrop = YES;
      }
      return draggablePinView;
  }
  
  
  -(void)longPressGesture:(UIGestureRecognizer *)gestureRecognizer
  {    
      if (gestureRecognizer.state == UIGestureRecognizerStateBegan)
      {
          CGPoint touchPoint = [gestureRecognizer locationInView:mapView];
          CLLocationCoordinate2D touchMapCoordinate = [mapView convertPoint:touchPoint toCoordinateFromView:mapView];
  
          [self dropPinWithCoords:touchMapCoordinate];
      }
  }
  
  - (void)mapView:(MKMapView *)mapview annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
  {        
      [self getFromServer];
  }
  
  -(void) showLoc8CodeDetail:(LOC8Code *) loc8
  {
      // Open the view controller
      viewLoc8ViewController *loc8view = [[viewLoc8ViewController alloc] initWithLoc8code:loc8];
      [gMainViewController.navigationController pushViewController:loc8view animated:YES];
      [loc8view release];
  }
  
  -(void) dropPinWithCoords:(CLLocationCoordinate2D)loc
  {
      // Set the loc8code from index 0 in the global array and populate from response
      LOC8Code *newPin = [gMapAnnotations objectAtIndex:0];
      newPin.starRating = 1;
      newPin.title = @"Unverified Pin";
      newPin.subtitle = @"Click to verify postcode";
      newPin.verified = NO; // this means you do have to requery if opened
      newPin.coordinate = loc;
  
  
      [self removeMapAnnotations];        
      [gMapAnnotations replaceObjectAtIndex:1 withObject:newPin];
      [self.mapView addAnnotation:[gMapAnnotations objectAtIndex:1]];
  
      // Reset flags
      [dropPinButton setTitle:@"Replace Pin" forState:UIControlStateNormal];
      [self moveAndHidePinButtons:NO];
  }
  -(void)getFromServer
  {
      [self checkRegisteredFromServer]; // Does API call to see if device already registered
  
      // Get the loc8 code from the global array (pin always index 1)
      LOC8Code *loc8 = [gMapAnnotations objectAtIndex:1];
  
      // If we have a verified pin already (from a search) just show the info
      if(loc8.verified == YES)
      {
          [self showLoc8CodeDetail:loc8];
      }
      else
      {
          [self setSpinning:YES];
          // Get coordinates
          NSString *urlWithCoords = [NSString stringWithFormat:@"https://www.server.com/api/rest/lite/loc?t=%@&amp;u=%@&amp;a=iloc8er&amp;la=%f&amp;lo=%f", 
                                      [Util getAPIToken], [UIDevice currentDevice].uniqueIdentifier, 
                                      loc8.coordinate.latitude,
                                      loc8.coordinate.longitude];
          NSLog(@"%@", urlWithCoords);
          ASIHTTPRequest *request = [self populateRequest:request withURL: urlWithCoords];
          [request setDidFinishSelector:@selector(loc8returned:)];
          [[self networkQueue] addOperation:request]; 
      }
  }
  
  -(void)loc8returned:(ASIHTTPRequest *)request
  {
      @try 
      {    
          NSString *response = [request responseString];
          NSLog(@"RSP: %@", response);
  
          // Store incoming data into an NSDictionary
          SBJsonParser *parser = [[SBJsonParser new]autorelease];
          NSDictionary *results = [parser objectWithString:response error:nil];
  
          // Check for errors
          NSNumber *r = [results objectForKey:@"r"];
          NSString *e = [results valueForKey:@"e"];
  
          if(r.boolValue == NO)
          {
              if([e isEqualToString:@"lc51"] || [e isEqualToString:@"lc52"])
              {
                  // Outside range
                  [self setSpinning:NO];
                  return;
              }
  
              if([e isEqualToString:@"ud04"])
              {
                  // quota check
                  [self setSpinning:NO];
                  return;
              }
          }
          else
          {
              LOC8Code *loc8 = [gMapAnnotations objectAtIndex:1];
  
              // Set the loc8code
              NSString *lc = [results valueForKey:@"lc"];
              loc8.postcode = lc;
              loc8.verified = YES;
              loc8.starRating = 0;
              loc8.title = lc;
  
  
              // This pin is now validated
              MKPinAnnotationView *pinView = (MKPinAnnotationView*)[mapView viewForAnnotation:[gMapAnnotations objectAtIndex:1]];
              pinView.pinColor = MKPinAnnotationColorGreen;
  
              // Open the view controller
              [self showLoc8CodeDetail:loc8];
          }
      }
      @catch (NSException *exception) 
      {
          [Util say:@"Service Temporarily Unavailable (-200):"];
          NSLog(@"RSP: %@, %@", [exception name], [exception reason]);
      }
      [self setSpinning:NO];
  }
  </code></pre>
  
  <p>The loc8code header class is defined as follows:</p>
  
  <pre><code>@interface LOC8Code : MKPlacemark {
      NSString *postcode;
      NSString *BusinessName;
      int starRating;
      CLLocationCoordinate2D coordinate_;
      NSString *title_;
      NSString *subtitle_;
      BOOL verified;          // Verified locations can't be moved (if pin moved then flag as not verified)
  }
  
  // Re-declare MKAnnotation's readonly property 'coordinate' to readwrite. 
  
  @property (nonatomic, retain) NSString *postcode;
  @property (nonatomic, retain) NSString *BusinessName;
  @property (nonatomic, assign) int starRating;
  @property (nonatomic, readwrite, assign) CLLocationCoordinate2D coordinate;
  @property (nonatomic, retain) NSString *title;
  @property (nonatomic, retain) NSString *subtitle;
  @property (nonatomic, assign) BOOL verified;
  
  @end
  </code></pre>
  
  <p>And the implementation</p>
  
  <pre><code>#import "LOC8Code.h"
  
  @implementation LOC8Code
  
  @synthesize coordinate = coordinate_;
  @synthesize title = title_;
  @synthesize subtitle = subtitle_;
  @synthesize verified;
  @synthesize starRating;
  @synthesize postcode;
  @synthesize BusinessName;
  
  
  - (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate addressDictionary:(NSDictionary *)addressDictionary {
  
      if ((self = [super initWithCoordinate:coordinate addressDictionary:addressDictionary])) {
          self.coordinate = coordinate;
      }
      return self;
  }
  
  - (void)dealloc {
      [title_ release];
      [subtitle_ release];
      [postcode release];
      [BusinessName release];
  
      [super dealloc];
  }
  
  @end
  </code></pre>