iOS Start Dev

1. 卸载cocopods

   1. $ which pod
      /usr/local/bin/pod
      $ sudo rm -rf /usr/local/bin/pod
      # $ sudo rm -rf `which pod`
      

   2. 参考：https://www.cnblogs.com/xiyuan2016/p/10626899.html

2. 安装ruby
   安装homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

1. 参考：https://www.jianshu.com/p/31b88efffaf9

2. brew update 
   brew install ruby
   echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.bash_profile
   source ~/.bash_profile
   ruby -v
   

3. 安装cocopod

   1. sudo gem install -n /usr/local/bin cocoapods
      # sudo gem install cocoapods 实际测试不行