iOS10自带了暂停动画的方法
在iOS10以下 需要自己实现
1.暂停layer动画
- (void)pauseLayer:(CALayer*)layer
{
CFTimeInterval pausedTime = [layer convertTime:CACurrentMediaTime() fromLayer:nil];
layer.timeOffset = pausedTime;
//暂停
layer.speed = 0.0;
}
2.恢复layer上的动画
- (void)resumeLayer:(CALayer*)layer
{
CFTimeInterval pausedTime = [layer timeOffset];
//暂停时间
CFTimeInterval timeSincePause = [layer convertTime:CACurrentMediaTime() fromLayer:nil] - pausedTime;
取消暂停
layer.timeOffset = 0.0;
layer.beginTime = 0.0;
layer.beginTime = timeSincePause;
//恢复动画
layer.speed = 1.0;
}
