1.移除現有Ruby默認源
$gem sources –remove https://rubygems.org/
2.使用新的源
$gem sources -a https://ruby.taobao.org/
3.驗證新源是否替換成功
$gem sources -l
4.安裝 RVM
RVM:Ruby Version Manager,Ruby版本管理器
$ curl -L get.rvm.io | bash -s stable
5.使文件生效
$ source ~/.bashrc
$ source ~/.bash_profile
6.測試是否安裝正常
rvm -v
7.安裝ruby-2.2版本
$rvm install ruby-2.2
8.安裝CocoaPods
$ sudo gem install cocoapods
$ pod setup
9.更新gem
$sudo gem update –system
參考http://www.cnblogs.com/zxs-19920314/p/4985476.html?utm_source=tuicool&utm_medium=referral