安装cocoapods-keys遇到的问题

安装cocoapods-keys

sudo gem install cocoapods cocoapods-keys

但是一直提示没有权限

ERROR:  While executing gem ... (Errno::EPERM)
    Operation not permitted - /usr/bin/autotest

解决方法：

chown -R $(whoami) ~/.gem
gem install cocoapods-keys --user-install