1、更新gem:sudo gem update --system
2、刪除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、升級cocoapods:sudo gem install -n /usr/local/bin?cocoapods --pre
6、查看升級后的cocoapods版本:pod --version