在react-navigation 5.x中将createSwitchNavigator放置在哪里，以便从react-navigation 4迁移到5.x [英] Where is placed createSwitchNavigator in react-navigation 5.x for migrating from react-navigation 4 to 5.x

问题描述

我正在将React Native应用程序从react-navigation 4迁移到5.x，但是我找不到哪个包包含createSwitchNavigation.具体来说，我对auth令牌检查部分有疑问.

I'm migrating a React Native application from react-navigation 4 to 5.x and i can't find which package contains createSwitchNavigation. Specifically i have doubts with the auth token check part.

在反应导航4中，我有:

With react-navigation 4 i had:

const switchNavigator = createSwitchNavigator({
  ResolveAuth: ResolveAuthScreen,
  signinFlow: createStackNavigator({
    Signup: SignupScreen,
    Signin: SigninScreen,
  }),
  appFlow: createBottomTabNavigator({
    TrackCreate: TrackCreateScreen,
    trackListFlow: createStackNavigator({
      TrackList: TrackListScreen,
      TrackDetail: TrackDetailScreen
    }),
    Account: AccountScreen,
  })
}, {
  initialRouteName: 'ResolveAuth'
});

然后我有一个包含ResolveAuthScreen组件的文件.

Then i have a file containing ResolveAuthScreen component.

import React, { useEffect } from 'react';
import { connect } from 'react-redux';

const ResolveAuthScreen = (props) => {
  useEffect(() => {
    if (!props.token) {
      props.navigation.navigate('loginFlow');
    } else {
      props.navigation.navigate('TrackList');
    }
  }, []);

  return null;
};

const mapStateToProps = (state) => {
  return {
    token: state.auth.token,
  };
};

export default connect(mapStateToProps, null)(ResolveAuthScreen);

其余组件对于此怀疑并不重要.我想知道如何复制相同的Switch导航流. 我想知道如何创建这样的东西:

The rest of components are not important for this doubt. I want to know how to replicate the same Switch navigation flow. I would like to know how can i create something like this:

const Switch = createSwitchNavigator();

export default function App() {
  return (
    <NavigationContainer>
      <Switch.Navigator>
        <Switch.Screen name="ResolveAuth" component={ResolveAuthScreen} />
        <Switch.Screen name="signinFlow" component={SignInFlowScreens} />
        <Switch.Screen name="appFlow" component={AppFlowScreens} />
      </Switch.Navigator>
    </NavigationContainer>
  );
}

推荐答案

在早期版本的React Navigation中，有两种方法可以解决此问题:

In earlier versions of React Navigation, there were 2 ways to handle this:

1. 保留多个导航器，并在登录后使用切换导航器将活动导航器切换到其他导航器(推荐)
2. 登录后将导航器的状态重置为所需的屏幕

但是对于v5，您需要使用上下文. 在此处中查看！

But for v5, you need to use context. Take a look at here to see a detailed example!

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