安装cocoapods遇到的坑

作为一个小白，折腾了几次没有成功，最近终于成功了，分享几篇参考别人的链接

http://www.jianshu.com/p/cac4150657ad

http://blog.youkuaiyun.com/samoy/article/details/51956799

http://blog.youkuaiyun.com/sjl_leaf/article/details/50506057