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

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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/...........