[React Native 开发环境安装和配置:-bash: react-native: command not found 报错：
前提是安装homebrew,node.js ,npm ,watchman,flow都成功。
执行react-native init TestProject 命令 创建demo时报错：-bash: react-native: command not found
报错提示：Please include the following file with any support request: /Users/ewu/npm-debug.log，就是npm-debug.log这个文件有权限，
解决方法：
加上sudo（root 权限）再执行命令：
sudo npm install -g react-native-cli
回车提示输入电脑密码，再回车，成功后再创建项目：
react-native init TestProject
--------------------------------- end ------------------------------------------------
终端打印日志表示正在创建：
This will walk you through creating a new React Native project in /Users/maple/Downloads/hellow/Hellotestddd
Installing react-native package from npm...
Setting up new React Native app in /Users/...........