1.PropTypes 已经从react模块转移到prop_types
import {PropTypes} from 'prop-types';
2.Navigator已从react-native转移到react-native-deprecated-custom-components中
import {Navigator} from "react-native-deprecated-custom-components"
react-native-deprecated-custom-components的安装:
npm install react-native-deprecated-custom-components --save
3.当load返回值是500的时候,大部分情况是node_modules的问题,不妨删除重新npm install,或者升级npm后再npm install