更换镜像pod setup
1.升级Ruby环境
$ sudo gem update --system国内Ruby镜像地址发生过更改
gems.ruby-china.org/换成了gems.ruby-china.com/
2.更换ruby镜像
$ gem sources --remove https://rubygems.org/ # 移除现有镜像$ gem sources -a https://gems.ruby-china.com/ # 添加国内最新镜像
$ gem sources -l # 查看当前镜像$ sudo gem install -n /usr/local/bin cocoapods$ pod setup # 挂vpn，耐心等待执行结果，速度提升到2.4m/s
sudo gem install 报错没有读写权限时：
$ sudo gem install -n /usr/local/bin [要安装的]