ipad 下雪特效 demo iTimeShow，精选ios编程学习源码，很好的参考资料。-IPad demo iTimeShow snow effects, selection of learning IOS programming source code, a good reference.

这个是IOS中很玄的动画，可以控件后面飘雪花，相当酷-This is a very mysterious IOS animation, snow can spend behind the controls, very cool