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
原文:http://www.cnblogs.com/wanghuaijun/p/5222591.html