项目以使用来控制动画,例如暂停、复苏继续等待,看看代码:(非常easy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; }
假设在一个view中我们加入了多个动画,(不是组合动画),相同easy实现动画的暂停、恢复,方法就是为每一个动画层layer调用上面的方法,比方我的方法例如以下,我用的是三个单独动画的组合效果,就是例如以下调用的
-(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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