问不变违规："main“未注册。如果：* Metro (本地dev服务器)从错误的文件夹运行，则可能发生这种情况。

EN

https://www.youtube.com/watch?v=6soHPnHxHxI


        import { registerRootComponent } from 'expo';
        import React from "react";
        import { AppRegistry } from "react-native";
        import App from "./App";
        import { name as appName } from "./app.json";
        import { Provider } from "react-redux";
        import { Provider as PaperProvider } from "react-native-paper"
        import store from "./store";
        import 'react-native-gesture-handler';

        const AppRedux = () => {
            <Provider {...{store}}>
                <PaperProvider>
                    <App></App>
                </PaperProvider>
            </Provider>
        }

        // registerRootComponent calls AppRegistry.registerComponent('main', () => App);
        // It also ensures that whether you load the app in the Expo client or in a native build,
        // the environment is set up appropriately
        //AppRegistry.registerComponent(appName, () => AppRedux);


        // registerRootComponent calls AppRegistry.registerComponent('main', () => App);
        // It also ensures that whether you load the app in the Expo client or in a native build,
        // the environment is set up appropriately
        registerRootComponent(AppRedux);

Invariant Violation: "main" has not been registered. This can happen if: * Metro (the local dev server) is run from the wrong folder.