CocoaPods安装

//移除原有的墙外Ruby 默认源

$ gem sources --remove https://rubygems.org/

// 更新为 ruby-china的镜像, 淘宝镜像已经停止

$ gem sources -a https://gems.ruby-china.org/

//验证新源是否替换成功

$ gem sources -l

//安装

$ sudo gem install -n /usr/local/bin cocoapods

//设置cocoa pods

$ pod setup

//终端中输入cd 项目目录，输入命令

$ pod init