//自定义大头针不能使用系统的MKPinAnnotationView来添加从天儿降的效果，只能自己添加动画

#pragma mark MKMapViewDelegate
- (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray *)views
{
    MKAnnotationView *annotationView;
    for (annotationView in views)
    {
        if (![annotationView isKindOfClass:[MKPinAnnotationView class]])
        {
            CGRect endFrame = annotationView.frame;
            annotationView.frame = CGRectMake(endFrame.origin.x, endFrame.origin.y - 500.0, endFrame.size.width, endFrame.size.height);
            [UIView beginAnimations:@"drop" context:NULL];
            [UIView setAnimationDuration:0.45];
            [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
            [annotationView setFrame:endFrame];
            [UIView commitAnimations];
        }
    }
}
 

//使用系统的大头针添加动画
    - (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id )annotation
     {
         MKPinAnnotationView *pinView = nil;

             static NSString *defaultPinID = @"com.invasivecode.pin";
             pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
             if ( pinView == nil ) pinView = [[[MKPinAnnotationView alloc]
                                               initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
             pinView.pinColor = MKPinAnnotationColorRed;
             pinView.canShowCallout = YES;
             pinView.animatesDrop = YES;
              [mapView.userLocation setTitle:@"欧陆经典"];
            [mapView.userLocation setSubtitle:@"vsp"];
          return pinView;
     }