https://github.com/facebook/pop

http://www.cocoachina.com/industry/20140507/8339.html

http://www.ui.cn/project.php?id=21148

 http://blog.csdn.net/u013741809/article/details/38511741

http://geeklu.com/2014/05/facebook-pop-usage/

Facebook的Pop动画库相关资料