cocoapods ERROR: Error installing cocoapods: ERROR: Failed to build gem native extension.

最近pod install 的时候总是报错，试了几次还是报

：cocoapods ERROR: Error installing cocoapods:

    ERROR: Failed to build gem native extension.

一气之下重新安装pod，成功解决报错，下面为安装不步骤，记录一下

1、安装Homebrew

/bin/zsh -c "$(curl -fsSL https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)"

2、通过brew安装ruby

（1）命令：brew install ruby

（2）配置环境变量：

echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.bash_profile

source ~/.bash_profile

3、安装 CocoaPods

（1）sudo gem install -n /usr/local/bin cocoapods

（2）pod repo update --verbose

4、替换镜像源

（1）移除：sudo gem sources--removehttps://rubygems.org/

（2）添加：sudo gem sources--addhttps://gems.ruby-china.com

（3）查看：gem sources -l