标签：io ar for sp on c ef as bs
[animation setAutoreverses:NO];
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
CABasicAnimation CAAnimationGroup等动画结束后避免回到初始状态的设置方法
原文地址：http://www.cnblogs.com/zengyanzhi/p/3952064.html
