Pod 命令行功能

1. 查看镜像：gem sources -l
2. 查看pod版本：pod --version
3. 查看repo：pod repo
4. 安装pod：sudo gem install -n /usr/local/bin cocoapods
5. 卸载pod：sudo gem uninstall -n /usr/local/bin cocoapods
6. 重置代理：

git config --global --unset http.proxy
git config --global --unset https.proxy

7. 查看ruby：ruby --version
8. 编辑host：sudo vim /etc/hosts
9. 查看本地安装过的cocopods相关module：
   gem list --local | grep cocoapods

卸载查出来的不同module

sudo gem uninstall cocoapods-deintegrate
sudo gem uninstall cocoapods-downloader
sudo gem uninstall cocoapods-plugins
sudo gem uninstall cocoapods-search
sudo gem uninstall cocoapods-trunk
sudo gem uninstall cocoapods-try

10. 单独更新某个第三方到本地Cocoapods库中最新版本，不更新其他本地第三方：pod update VName --verbose --no-repo-update
    例如：pod update AFNetworking --verbose --no-repo-update