1. ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

 brew install ruby

 gem sources --remove http://ruby.taobao.org/ //移除原文件地址 

2.  gem sources -a https://ruby.taobao.org/   //添加新文件地址

3. gem sources -l    //查看源文件地址是否正确

4. sudo gem install cocoapods    //更新命令:sudo gem install cocoapods
命令:pod setup命令: touch Podfile 创建
命令: open -e Podfile 打开

命令:pod install 

5. 命令:pod update

http://www.th7.cn/Program/Ruby/201507/513274.shtml