Cocopods 遇到You don't have write permissions for the /usr/bin directory.

安装cocoapods时候

命令 sudo gem install cocopods

提示

tiantaodeMacBook-Pro:~ tiantao$ sudo gem install cocoapods

ERROR: While executing gem ... (Gem::FilePermissionError)

You don't have write permissions for the /usr/bin directory.

解决方案：

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