Javascript 不知道如何使用导航。在本机应用程序中导航

我创建了一个基本的SplashScreen.tsx，上面只有一些文本。然后，我创建了这个LoginCreateAccountScreen.tsx，它有一个Login按钮和createaccount按钮。我想让我的应用程序在自动导航到LoginCreateAccountScreen.tsx之前显示SplashScreen.tsx几秒钟。此外，按下按钮会将用户重定向到其他屏幕，但这也不起作用。我不知道如何做到这一点，并且在弄清楚如何做到这一点上遇到了很多困难

我用它以及各种StackOverflow帖子到达了我现在的位置。但老实说，我很迷茫，因为前端导航有太多的事情要做

我不明白AppNavigator.js和App.js（我的应用程序的入口点）如何协同工作，让我能够从当前屏幕导航到另一个屏幕。现在，我无法使用任何导航。我必须通过在App.js中设置来手动更改屏幕

My App.js，用于渲染SplashScreen。但不会转换到LoginCreateAccount屏幕

import React, { Component } from 'react';

import EmojiDict from './screens/EmojiDict';
import SplashScreen from './screens/SplashScreen';
import LoginCreateAccountScreen from './screens/LoginCreateAccountScreen'

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

My SplashScreen.tsx：

当我按下“登录”或“创建帐户”按钮时，出现以下错误，这两个按钮都是相同的：

---

错误消息说，您的电脑中没有导航道具　创建帐户登录组件

您需要将CreateAccountOrLogin添加到createStackNavigator，然后createStackNavigator将导航道具传递给CreateAccountOrLogin

const MainNavigator = createStackNavigator({
  SplashScreen: {screen: SplashScreen},
  LoginCreateAccountScreen: {screen: LoginCreateAccountScreen},
  LoginScreen: {screen: LoginScreen},
  CreateAccountScreen: {screen: CreateAccountScreen},
+ CreateAccountOrLogin
});

只需在CreateAccountOrLogin中编写以下代码，就可以知道props.navigation是否存在

render() {
  console.log(this.props) 
  return(

---

这就是react导航有用的地方。我会指导你的。我相信您已经按照文档安装了react导航。否则一定要先下载。看看这个。希望能有帮助

让我们首先从堆栈导航器开始，所以您希望在开始时显示splashscreen，然后向右导航到loginscreen。因此AppNavigator应该如下所示：

import { createAppContainer, createSwitchNavigator } from "react-navigation";
import { createStackNavigator } from "react-navigation";
import MainTabNavigator from "./MainTabNavigator";
import { Platform } from "react-native";
// Importing my screens here.
import LoginCreateAccountScreen from "../screens/LoginCreateAccountScreen";
import CreateAccountScreen from "../screens/CreateAccountScreen";
import LoginScreen from "../screens/Login/LoginScreen";
import SplashScreen from "../screens/SplashScreen";

const MainNavigator = createStackNavigator({
  SplashScreen: {screen: SplashScreen},
  LoginCreateAccountScreen: {screen: LoginCreateAccountScreen},
  LoginScreen: {screen: LoginScreen},
  CreateAccountScreen: {screen: CreateAccountScreen},
},
{ initialRouteName: 'SplashScreen'} // have added this coz you want splashscreen to be first rendered
);

const App = createAppContainer(MainNavigator);

export default App;

现在你的应用导航器已经制作好了，现在让我们切换到初始屏幕，在那里你想让它呈现3秒钟，然后导航到LoginScreen。所以我们将重定向到componentDidMount中的登录屏幕，让我们构建一个

溅屏：

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

class SplashScreen extends Component {

componentDidMount(){

this.setTimeout(() => {this.props.navigation.navigate("LoginScreen")} , 3000); // im redirecting to login screen after 3 secs of showing splash screen.
}

    render() {
        return (
            <View style={styles.container}>
                <Text style={styles.title}>
                    The Good App
                </Text>
            </View>
        );
    }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
    },
    title: {
        fontSize: 45,
        textAlign: 'center',
        fontWeight: 'bold'
    }
});

export default SplashScreen;

那么只有this.props.navigation.navigateScreenName可以工作

---

希望能有帮助。不要怀疑

嗨，这对我来说完全有道理。但是，我的应用程序的入口点是app.js。我假设我必须将AppNavigator导入App.js并呈现它？你可以在App.js中编写AppNavigator代码，如果你在App.js中没有任何其他特定内容，只需将代码粘贴到App.js中即可

render() {
  console.log(this.props) 
  return(

import { createAppContainer, createSwitchNavigator } from "react-navigation";
import { createStackNavigator } from "react-navigation";
import MainTabNavigator from "./MainTabNavigator";
import { Platform } from "react-native";
// Importing my screens here.
import LoginCreateAccountScreen from "../screens/LoginCreateAccountScreen";
import CreateAccountScreen from "../screens/CreateAccountScreen";
import LoginScreen from "../screens/Login/LoginScreen";
import SplashScreen from "../screens/SplashScreen";

const MainNavigator = createStackNavigator({
  SplashScreen: {screen: SplashScreen},
  LoginCreateAccountScreen: {screen: LoginCreateAccountScreen},
  LoginScreen: {screen: LoginScreen},
  CreateAccountScreen: {screen: CreateAccountScreen},
},
{ initialRouteName: 'SplashScreen'} // have added this coz you want splashscreen to be first rendered
);

const App = createAppContainer(MainNavigator);

export default App;

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

class SplashScreen extends Component {

componentDidMount(){

this.setTimeout(() => {this.props.navigation.navigate("LoginScreen")} , 3000); // im redirecting to login screen after 3 secs of showing splash screen.
}

    render() {
        return (
            <View style={styles.container}>
                <Text style={styles.title}>
                    The Good App
                </Text>
            </View>
        );
    }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
    },
    title: {
        fontSize: 45,
        textAlign: 'center',
        fontWeight: 'bold'
    }
});

export default SplashScreen;

import ScreenName from "../screens/ScreenName";

    const MainNavigator = createStackNavigator({
      SplashScreen: {screen: SplashScreen},
      LoginCreateAccountScreen: {screen: LoginCreateAccountScreen},
      LoginScreen: {screen: LoginScreen},
      CreateAccountScreen: {screen: CreateAccountScreen},
     ScreenName:{screen:ScreenName}
    },
    { initialRouteName: 'SplashScreen'} // have added this coz you want splashscreen to be first rendered
    );