React Native 已经发布很多天了，增加了很多有意思的特新

https://github.com/facebook/react-native/releases/tag/v0.19.0-rc

如 react-native 增加了一个 Usage，如你所见到的一样，有些新的面孔出现。

$ react-native
Usage: react-native <command>

Commands:
  - start: starts the webserver
  - bundle: builds the javascript bundle for offline use
  - unbundle: builds javascript as "unbundle" for offline use
  - new-library: generates a native library bridge
  - link: Adds a third-party library to your project. Example: react-native link awesome-camera
  - android: generates an Android project for your app
  - run-android: builds your app and starts it on a connected Android emulator or device
  - run-ios: builds your app and starts it on iOS simulator
  - upgrade: upgrade your app's template files to the latest version; run this after updating the react-native version in your package.json and running npm install

升级

• 修改 package.json 的版本为0.19.0-rc1，然后执行 npm i

"dependencies": {
    "react-native": "^0.19.0-rc",
    ...
}

或者直接安装

npm install --save react-native@0.19.0-rc

• 执行 upgrade

react-native upgrade

如果文件有冲突的，会提示你是否覆盖

执行完毕后，测试下

测试

iOS

react-native run-ios

Android

react-native run-android

问题

不过大部分用户可能会遇到什么react-deep-force-update的.babelrc的一个unkonw option，那是因为依赖的第三方包(react-proxy, 目前 master 已经修复了)还在使用老版本的Babel，所以你可以参考如下的方案

https://github.com/facebook/react-native/issues/5393

即在 package.json 的 scripts中增加如下选项：

"scripts": { 
    "clean:babelrc": "find ./node_modules -name react-packager -prune -o -name '.babelrc' -print | xargs rm -f",
    "postinstall": "npm run clean:babelrc"
}

然后就能正在执行了。