javascript - 即使遵循 react 导航文档， react 导航也无法在屏幕之间导航

Question

我正在关注 this doc 从 react-navigation 学习，我正在尝试和尝试，但我无法在屏幕之间导航。每次我更改某些内容时，都会弹出一个随机错误。如果我只调用一个屏幕作为 <HomeScreen/>，App.js 运行良好在 App.js 的根目录中。

我这样调用 HomeScreen:

import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import HomeScreen from './Comps/HomeScreen';
import { StackNavigator } from 'react-navigation';
import DetailsScreen from './Comps/DetailsScreen';

class App extends React.Component {
  render() {
    return (
      <HomeScreen />
    );
  }
}



const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

export default App;

现在一切正常，显示了里面的内容 HomeScreen.js

 import React from 'react';
 import { StyleSheet, Text, View, SafeAreaView, Button } from 'react-native';
 import { createDrawerNavigator } from 'react-navigation-drawer';
 import { createAppContainer, navigation } from 'react-navigation';
 import { createStackNavigator } from 'react-navigation-stack';

 class HomeScreen extends React.Component {
     render() {
       return (
         <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
           <Text>Home Screen</Text>
           <Button
             title="Go to Details"
             onPress={() => this.props.navigation.navigate('Details')}
           />
         </View>
       );
     }
   }

 export default HomeScreen;

但是当我点击按钮时，随机弹出一个错误，有时它说 undefined is not an object，有时它找不到 StackNavigator ，有时导航有问题。我安装了所有依赖项，但如果我在这里遗漏了什么，请告诉我。

来自 HomeScreen.js我调用DetailsScreen.js就像文档中说的那样。

 import React from 'react';
 import { StyleSheet, Text, View, SafeAreaView, Button } from 'react-native';
 import { createDrawerNavigator } from 'react-navigation-drawer';
 import { createAppContainer, navigation } from 'react-navigation';
 import { createStackNavigator } from 'react-navigation-stack';
 import { withNavigation } from 'react-navigation';


 class DetailsScreen extends React.Component {
     render() {
         return (
             <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
                 <Text>Details Screen</Text>
                 <Button
                     title="Go to Details... again"
                     onPress={() => this.props.navigation.navigate('Details')}
                 />
             </View>
         );
     }
 }
 export default DetailsScreen;

Answer 1

您需要像这样使用 createAppContainer 定义 AppContainer( What is AppContainers )

const AppContainer = createAppContainer(RootStack);

RootStack 将是您要显示的屏幕列表。使用 createStackNavigator( what is createStackNavigator ) 像这样添加它们:

const RootStack = createStackNavigator(
  {
    Home: HomeScreen,
    Details: DetailsScreen,
  },
  {
    initialRouteName: 'Home',
  }
);

并在 App.js 中添加 const AppContainer 和 const RootStack，然后像这样导出 class App:

 export default class App extends React.Component {
   render() {
     return <AppContainer/>;
   }

如果屏幕在不同的文件中，比如 ./Comps/HomeScreen.js 或 ./Comps/DetailsS​​creen.js 然后在创建之前将它们导入 App.js屏幕。像这样:

import HomeScreen from './Comps/HomeScreen';
import DetailsScreen from './Comps/DetailsScreen'