1.http://blog.csdn.net/wyx100/article/details/52667518
2.http://mp.weixin.qq.com/s?__biz=MzIyMDM2Mjg2Nw==&mid=2247484440&idx=1&sn=d612c592324a20b4240de0a0b98feee5&chksm=97cc6504a0bbec1297b5116dbc051dbcb8b7a6165fd3392dabd1a3ef0a38e8b452a64092f8af&scene=0#wechat_redirect