安装cocoapods时遇到错误

1、安装cocoapods时遇到错误

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions into the /usr/bin directory.

2、解决方案

1. 方案一：

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

ps：缺点 之后安装其他插件时还会报错

1. 完美解决方案：

   (1) 打开 ~/.gemrc file

   vim ~/.gemrc
   

   (2) 在最后添加:

   :gemdir:
       - ~/.gem/ruby
   install: -n /usr/local/bin
   

   Ps:优点 之后安装所有插件都正常安装