Mac下全局安装yarn ，没权限处理方式
直接全局安装时报没有权限的错误
checkPermissions Missing write access to /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! syscall access
npm ERR! path /usr/local/lib/node_modules
请用下边两命令
- sudo -s
- npm install -g yarn react-native-cli
直接全局安装时报没有权限的错误
checkPermissions Missing write access to /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! syscall access
npm ERR! path /usr/local/lib/node_modules
请用下边两命令