cocoapod

1、更新gem：sudo gem update --system

2、删除gem源：gem sources --remove https://ruby.taobao.org/

3、修改gem源：gem sources -a https://gems.ruby-china.org

4、查看gem源是否是最新的：gem sources -l

5、升级cocoapods：sudo gem install -n /usr/local/bin cocoapods --pre

6、查看升级后的cocoapods版本：pod --version


7 删除 cocoapod sudo gem uninstall cocoapods