ios - 模块 AppRegistry 不是注册的可调用模块

Question

我从 React Native 开发开始，一开始就遇到了一个问题。尝试运行我的应用程序时出现错误:

Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication)
Unhandled JS Exception: Invariant Violation: Native module cannot be null.
Unhandled JS Exception: Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication)

我的 App.js:

import React, { Component } from 'react';
import { SafeAreaView } from 'react-native';
import DefaultRouter from './src/navigation/DefaultRouter'

export default class App extends Component {
  render() {
    return (
      <SafeAreaView>
        <DefaultRouter />
      </SafeAreaView>
      );
    }
  };

index.js:

import { AppRegistry } from 'react-native';
import App from './App';
import {name as appName} from './app.json';

AppRegistry.registerComponent(appName, () => App);

DefaultRouter.js:

import { createSwitchNavigator, createAppContainer } from 'react-navigation';
import LoginScreen from '../screen/LoginScreen';
import DefaultTabBar from '../navigation/TabBar';

const DefaultRouter = createSwitchNavigator({
    LOGIN_SCREEN: {
        screen: LoginScreen
    },
    TAB_NAVIGATION: {
        screen: DefaultTabBar
    }
}, {
    initialRouteName: 'LOGIN_SCREEN',
    headerMode: 'none'
})

export default createAppContainer(DefaultRouter)

其他文件很简单 Component子类。

无论我是从 Visual Studio Code 还是使用 react-native run-ios 的终端运行应用程序，问题都会出现

我查看了现有的答案，但没有找到任何可以为我指明正确方向的东西:
React-Native: Module AppRegistry is not a registered callable module
React Native: Module AppRegistry is not a registered callable module (calling runApplication)
module appregistry is not a registered callable module (calling runApplication)
Module AppRegistry is not a registered callable module and Cant find variable: Constants
React Native Module AppRegistry is not a registered callable module
Module AppRegistry is not a registered callable module only in Release configuration

我被困住了，我不知道从这里去哪里

Answer 1

运行npm cache verify或 cd ios && pod install然后 npm run ios