ios animation的暂停pause、恢复resume

来源：互联网发布：dbaccess declare sql 编辑：程序博客网时间：2024/06/01 23:15

项目中要用到动画的控制，比如说暂停、恢复继续等，先看代码：（很容易实现）

-(void)pauseLayer:(CALayer*)layer{    CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];    layer.speed = 0.0;    layer.timeOffset = pausedTime;}-(void)resumeLayer:(CALayer*)layer{    CFTimeInterval pausedTime = [layer timeOffset];    layer.speed = 1.0;    layer.timeOffset = 0.0;    layer.beginTime = 0.0;    CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;    layer.beginTime = timeSincePause;}

如果在一个view中我们添加了多个动画，（不是组合动画），同样容易实现动画的暂停、恢复，方法就是为每个动画层layer调用上面的方法，比如我的方法如下，我用的是三个单独动画的组合效果，就是如下调用的

-(void)stopAnimation;{    NSLog(@"停止动画");    //[_customView.layer removeAllAnimations];    [self pauseLayer:_customView1.layer];    [self pauseLayer:_customView2.layer];    [self pauseLayer:_customView3.layer];}-(void)resumeAnimation{    [self resumeLayer:_customView1.layer];    [self resumeLayer:_customView2.layer];    [self resumeLayer:_customView3.layer];}

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