今天 pod install 报错了，记录一下解决方案

报错如下 ：

/Library/Ruby/Site/2.0.0/rubygems.rb:270:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) (Gem::GemNotFoundException)
    from /Library/Ruby/Site/2.0.0/rubygems.rb:298:in `activate_bin_path'
    from /usr/local/bin/pod:22:in `<main>'

解决方案：

两步搞定

sudo gem uninstall cocoapods

按提示输入密码，然后回车

gem install cocoapods

    原文作者：LinXunFeng
    原文地址: https://www.jianshu.com/p/4e5e6680e17d
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