我已经彻底放弃了,尤其看了这篇之后
http://mp.weixin.qq.com/s?__biz=MzAxODY1ODc4MA==&mid=400868813&idx=3&sn=6eddbb36b891e95c6192e71f7e9fb91f&scene=1&srcid=11152EGGrNGGF8pOsp8YyFoY&from=singlemessage&isappinstalled=0#wechat_redirect