1、基于react-native-camera库实现的一个二维码/条形码扫描器
https://github.com/ztind/react-native-qrscan
2、单选radio
https://github.com/antiantian/radio
https://github.com/thegamenicorus/react-native-flexi-radio-button
3、文件上传 https://github.com/aroth/react-native-uploader
4、加载动画 https://github.com/maxs15/react-native-spinkit
5、本地持久存储的封装，可以同时支持react-native(AsyncStorage)和浏览器(localStorage)。ES6语法，promise异步读取，使用jest进行了完整的单元测试。
https://github.com/sunnylqm/react-native-storage
6、PDF https://github.com/cnjon/react-native-pdf-view
7、聊天相关的 https://github.com/FaridSafi/react-native-gifted-chat
