启动

npm install 

npm run ios
npm run android

图标问题

/**
*   react-native 中使用了 react-native-vector-icons
*   直接 import 会报错需要link
*   https://www.npmjs.com/package/react-native-vector-icons#examples
*   
*   启动页控制
*   https://zhuanlan.zhihu.com/p/29495955
**/

react-native link react-native-vector-icons
react-native link react-native-splash-screen

import Icon from "react-native-vector-icons/Ionicons"