查看CocoaPods版本
$ pod --version
命令行更新（安裝）步驟【更新】
$ sudo gem update --system // 先更新gem乙帮，國(guó)內(nèi)需要切換源
$ gem sources --remove https://rubygems.org/
$ gem sources -a https://ruby.taobao.org/
$ gem sources -l\*\*\* CURRENT SOURCES \*\*\*https://ruby.taobao.org/
$ sudo gem install cocoapods // 安裝cocoapods
$ pod setup
在運(yùn)行 sudo gem install cocoapods 的時(shí)候出現(xiàn)問(wèn)題：```
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/xcodeproj
則可以改為：
`sudo gem install -n /usr/local/bin cocoapods`