安装homebrew
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
安装ruby，系统自带的版本过低
brew install ruby
设置path
# 写入 zsh 配置文件
echo 'export PATH="/opt/homebrew/opt/ruby/bin:$PATH"' >> ~/.zshrc
echo 'export GEM_HOME="$HOME/.gem"' >> ~/.zshrc
使配置生效
source ~/.zshrc
安装cocoapods
gem install cocoapods --no-document
