使用cocopods遇到的问题：

https://www.cnblogs.com/lmfboke/p/6501678.html

显示当前使用的sources

gem sources

添加一个source

gem sources -a https://gems.ruby-china.com/

删除一个source

gem sources -r ...

更新source cache

gem sources -u

gem update --system

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

接下来就可以删掉本地的pods文件执行下面指令来更新pods文件了

pod update --no-repo-update

pod setup很慢的问题:

[https://blog.csdn.net/qq_42283150/article/details/93179665](https://blog.csdn.net/qq_42283150/article/details/93179665)