Question

I have a map and a set of annotations, each with a ‘parent’ property. Currently when I add annotations I implement the didAddAnnotationViews method to animate those annotations so they appear to come from their parent’s coordinate. Is there a way of doing this during the removal of annotations? When I remove an annotation from the map I want it to animate in to its parent coordinate, and as far as I know there is no equivalent for didAddAnnotationViews for when an annotation is removed.

Answer 1

Animate annotation before you remove it from the map and perform removal after animation is completed. The code may look like:

- (void) removeMyAnnotation:(MyAnnotation*)annotation{
   [UIView animateWithDuration:1.0f
                    animations:^(void){
                         annotation.coordinate = annotation.parentAnnotation.coordinate;
                    }
                    completion:^(BOOL finished)completion{
                        [mapView removeAnnotation:annotation];
                    }
}