动画删除注释 [英] Animate removal of annotations

问题描述

我有一张地图和一组注释，每个注释都有一个父属性。目前，当我添加注释时，我实现了didAddAnnotationViews方法来为这些注释设置动画，使它们看起来来自父级的坐标。在删除注释期间有没有办法做到这一点？当我从地图中删除注释时，我希望它在其父坐标中设置动画，据我所知，当删除注释时，didAddAnnotationViews没有等效项。

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.

推荐答案

动画注释之前将其从地图中移除并在动画完成后执行删除。代码可能如下所示：

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];
                    }
}

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