IOS/Swift暂停和恢复图层动画

开始图层动画的代码：

//mySuperLayer父图层

CFTimeInterval pausedTime = [self.mySuperLayer timeOffset];

if (pausedTime > 0)//在暂停后才能使用

{

self.mySuperLayer.speed = 1.0;

self.mySuperLayer.timeOffset = 0.0;

self.mySuperLayer.beginTime = 0.0;

CFTimeInterval timeSincePause = [self.mySuperLayer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;

self.mySuperLayer.beginTime = timeSincePause;

}

暂停图层动画的代码：

CFTimeInterval pausedTime = [self.mySuperLayer convertTime:CACurrentMediaTime() fromLayer:nil];

self.mySuperLayer.speed = 0.0;

self.mySuperLayer.timeOffset = pausedTime;

例子下载：https://github.com/yoimhere/ZJLoadView/archive/master.zip