cocoapods 使用过程中遇到过的问题

cocoapods 在 MacOS 10.13.2 遇到如标题中的问题
-bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby: bad interpreter: No such file or directory
解决：
sudo gem install -n /usr/local/bin cocoapods