react-native 0.6之后版本已从react-native移除WebView组件，
import {WebView} from "react-native" -- 当前最新版本已不支持
按文档上步骤发现需要安装依赖项: react-native-webview
npm i react-native-webview
import { WebView } from "react-native-webview"
关于react-native报错: Invariant Violation: WebView has been removed from React Native. It can ....
原文：https://www.cnblogs.com/james-L/p/12888303.html