Ios 您不能以root用户身份运行CoCoapod

当我对我的cordova项目执行sudo cordova要求时，我得到以下响应：

Requirements check results for ios:
Apple macOS: installed darwin
Xcode: installed [object Object]
ios-deploy: installed [object Object]
CocoaPods: not installed 
/Users/username/.rvm/rubies/ruby-2.5.0/lib/ruby/gems/2.5.0/gems/claide-1.0.2/lib/claide/command.rb:439:in `help!': [!] You cannot run CocoaPods as root. (CLAide::Help)

但我已经成功安装了cocoapods：

MacBook-Pro-di-Name:~ username$ sudo gem install cocoapods
Successfully installed cocoapods-1.5.3
Parsing documentation for cocoapods-1.5.3
Done installing documentation for cocoapods after 4 seconds
1 gem installed

MacBook-Pro-di-Name:project-cordova username$ pod --version
1.5.3

我在其他的帖子中也发现了类似的问题，比如or。如果我尝试第二种解决方案，我会得到

MacBook-Pro-di-Name:project-cordova username$ sudo chown -R $USER ~/Library/Caches/CocoaPods
chown: /Users/username/Library/Caches/CocoaPods: No such file or directory
MacBook-Pro-di-Name:project-cordova username$ sudo chown -R $USER ~/.cocoapods
chown: /Users/username/.cocoapods: No such file or directory
MacBook-Pro-di-Name:sbc-cordova username$ sudo chown -R $USER ./Pods
chown: ./Pods: No such file or directory 

我还尝试在我的Mac上更新Ruby版本。对我来说什么都不管用。我有Sierra（10.12.3）和最后一个Cordova版本（8.0.0），有什么办法解决这个问题吗？提前谢谢