javascript - Android 的错误代码 : 500 on react native 0. 56

Question

我的项目是一个新的空 react native 项目。构建时一切都很酷，但在 Android 设备上我每次都会遇到红色的“错误 500”屏幕。我已经尝试过这段代码:

yarn remove babel-preset-react-native
yarn add babel-preset-react-native@2.1.0

到目前为止没有任何变化!

我尝试将 React Native 降级到 55.4 - 没有变化!清洁捕获物 - 没有变化!顺便说一句，这是我的 App.js:

import React, {Component} from 'react';
import {Platform, StyleSheet, Text, View} from 'react-native';

const instructions = Platform.select({
  ios: 'Press Cmd+R to reload,\n' + 'Cmd+D or shake for dev menu',
  android:
    'Double tap R on your keyboard to reload,\n' +
    'Shake or press menu button for dev menu',
});

type Props = {};
export default class App extends Component<Props> {
  render() {
    return (
      <View style={styles.container}>
        <Text style={styles.welcome}>Welcome to React Native!</Text>
        <Text style={styles.instructions}>To get started, edit App.js</Text>
        <Text style={styles.instructions}>{instructions}</Text>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});

index.js:

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

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

这是我的 package.json:

{
  "name": "app",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "react": "16.4.1",
    "react-native": "0.56.0"
  },
  "devDependencies": {
    "babel-jest": "23.4.2",
    "babel-preset-react-native": "5",
    "jest": "23.5.0",
    "react-test-renderer": "16.4.1"
  },
  "jest": {
    "preset": "react-native"
  }
}

Windows 10 64 位网络 Storm

Answer 1

最新的 React Native 版本似乎存在一些问题。

使用以下命令创建项目。

react-native init --version="0.54.0" ProjectName

一定会成功的。