error adding a splash to my expo react native app

问题

I have my next splash, my idea is to be able to show my app logo when opening the application and then go to the start of the application, it works fine:

import React from 'react';
import { StyleSheet, Image, View, Text } from 'react-native';
import { StackActions, NavigationActions } from 'react-navigation';

export default class Splash extends React.Component {
    
    
    goToScreen(routeName){
        const resetAction = StackActions.reset({
            index: 0,
            actions: [NavigationActions.navigate({ routeName: routeName })],
        });
        this.props.navigation.dispatch(resetAction);
    }   
    
    /*goToScreen(routeName){
        this.props.navigation.navigate(routeName)
    }*/

    componentDidMount(){
        setTimeout( () => {
            this.goToScreen('Home')
        }, 2000, this)
    }

    render(){
        return (
            <View style={styles.container}>
                <Image source={{uri: 'https://i.imgur.com/r0jUwOD.png'}} style={{width: 250, height: 250}} />
            </View>
        );
    }
}
const styles = StyleSheet.create({
    container: {
        flex: 1,
        backgroundColor: '#33B747',
        alignItems: 'center',
        justifyContent: 'center'
    },
});

The problem is the location of the splash, since in this way if it shows me, but it creates a lower button called Splash, on the other hand the splash when loading is shown in conjunction with the lower buttons and that should not happen, the splash must display only in full screen and not create a button.

AppNavigator.js

import React from 'react';
import { createStackNavigator } from 'react-navigation-stack';
import { createBottomTabNavigator } from 'react-navigation-tabs';
import { createAppContainer } from 'react-navigation';
import { MaterialIcons, MaterialCommunityIcons } from '@expo/vector-icons';

import Splash from '../screens/Splash';
import NewsListScreen from '../screens/NewsListScreen';
import NewsItemScreen from '../screens/NewsItemScreen';


const StackNavigator = createStackNavigator({
    Splash: {
        screen: Splash,
        navigationOptions: {
            headerShown: false,
        }
    },
    News: {
        screen: NewsListScreen
    },
    Root: {
        screen: BottomTabNavigator,
    },
    NewsItem: {
        screen: NewsItemScreen,
        navigationOptions: {
            headerTitle: 'News Item'
        }
    },
    },{
        initialRouteName: 'Splash'
});

const BottomTabNavigator = createBottomTabNavigator({
    Home: {
        screen: StackNavigator,
        navigationOptions: {
            tabBarIcon: () => <MaterialIcons name="home" size={24} />
        }
    },
    News: {
        screen: StackNavigator,
        navigationOptions: {
            tabBarIcon: () => <MaterialCommunityIcons name="newspaper-variant-outline" size={24} />
        }
    }
})

export default createAppContainer(BottomTabNavigator);

App.js

import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import { AppLoading } from 'expo';
import { Provider } from 'react-redux';

import AppNavigator from './app/resources/navigation/AppNavigator';
import ReduxStore from './app/resources/redux/ReduxStore';

export default function App() {
    return (
        <Provider store={ReduxStore}>
            <AppNavigator />
        </Provider>
    );
}

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

Attached capture of the error upload in imgur capture 1 and capture 2

回答1:

The recommended way to add a splash screen to an expo managed app can be found here.

I've managed to create an expo project and achieve the exact same behavior that you've looking for.

I've used react-navigation 4.x.x

This is how it looks and you can find the full code here

Here is the code I've used.

Splash.js

import React, { Component } from "react";
import { Text, SafeAreaView, View, StyleSheet } from "react-native";
import { StackActions, NavigationActions } from "react-navigation";

export class Splash extends Component {
  goToScreen(routeName) {
    const resetAction = StackActions.reset({
      index: 0,
      actions: [NavigationActions.navigate({ routeName: routeName })],
    });
    this.props.navigation.dispatch(resetAction);
  }

  componentDidMount() {
    setTimeout(
      () => {
        this.goToScreen("Root");
      },
      2000,
      this
    );
  }

  render() {
    return (
      <SafeAreaView style={styles.mainContainer}>
        <Text style={styles.text}> Splash Screen </Text>
      </SafeAreaView>
    );
  }
}

const styles = StyleSheet.create({
  mainContainer: {
    flex: 1,
    justifyContent: "center",
    alignItems: "center",
    backgroundColor: "#efef21",
  },
  text: {
    fontSize: 22,
  },
});

export default Splash;

Navigator.js

import { createStackNavigator } from "react-navigation-stack";
import { createAppContainer } from "react-navigation";
import Home from "./Home";
import Splash from "./Splash";
import TabNavigator from "./BottomTabNavigator";

const AppNavigator = createStackNavigator(
  {
    Splash: {
      screen: Splash,
      navigationOptions: {
        headerShown: false,
      },
    },
    Root: {
      screen: TabNavigator,
      navigationOptions: {
        headerShown: false,
      },
    },
  },
  {
    initialRouteName: "Splash",
  }
);

export default createAppContainer(AppNavigator);

BottomTabNavigator.js

import { createAppContainer } from "react-navigation";
import { createBottomTabNavigator } from "react-navigation-tabs";
import Home from "./Home";
import News from "./News";

const TabNavigator = createBottomTabNavigator({
  Home: {
    screen: Home,
    navigationOptions: {
      title: "Home",
    },
  },
  News: {
    screen: News,
    navigationOptions: {
      title: "News",
    },
  },
});

export default createAppContainer(TabNavigator);

Also, I've achieved the same behavior using react-navigation 5.x.x

You can find my code here

Edit 01

If you want to have the headers, You need to use a Stack Navigator for each tab.

Here is the updated code of BottomTabNAvigator.js

import { createAppContainer } from "react-navigation";
import { createBottomTabNavigator } from "react-navigation-tabs";
import { createStackNavigator } from "react-navigation-stack";
import Home from "./Home";
import News from "./News";

const HomeStack = createStackNavigator({
  Home: Home,
});

const NewsStack = createStackNavigator({
  News: News,
});

const TabNavigator = createBottomTabNavigator({
  Home: {
    screen: HomeStack,
    navigationOptions: {
      headerTitle: "Home",
      title: "Home",
    },
  },
  News: {
    screen: NewsStack,
    navigationOptions: {
      title: "News",
    },
  },
});

export default createAppContainer(TabNavigator);

回答2:

You have used Splash: {screen: Splash}, in your BottomTabNavigator so obviously it will add splash as on bottom navigator. Remove Splash: {screen: Splash}, from BottomTabNavigator and paste it on StackNavigator and set splash as initialRouteName

const StackNavigator = createStackNavigator({
    News: {
        screen: NewsListScreen
    },
    Splash: {screen: Splash},
    NewsItem: {
        screen: NewsItemScreen,
        navigationOptions: {
            headerTitle: 'News Item'
        }
    },
},
   {
       initialRouteName : 'Splash'
    });

回答3:

you have to move splash screen to StackNavigator and add BottomTabNavigator into StackNavigator as a screen like this

import React from 'react';
import { createStackNavigator } from 'react-navigation-stack';
import { createBottomTabNavigator } from 'react-navigation-tabs';
import { createAppContainer } from 'react-navigation';
import { MaterialIcons } from '@expo/vector-icons'; 

import Splash from '../screens/Splash';
import NewsListScreen from '../screens/NewsListScreen';
import NewsItemScreen from '../screens/NewsItemScreen';


const StackNavigator = createStackNavigator({
    Splash: {
        screen: Splash
    },
    Home: {
        screen: BottomTabNavigator
    },
    News: {
        screen: NewsListScreen
    },
    NewsItem: {
        screen: NewsItemScreen,
        navigationOptions: {
            headerTitle: 'News Item'
        }
    }
},
{
    initialRouteName: "Splash",
});

const BottomTabNavigator = createBottomTabNavigator({
    Home: {
        screen: StackNavigator,
        navigationOptions: {
            tabBarIcon: () => <MaterialIcons name="home" size={24} />
        }
    }
})

export default createAppContainer(StackNavigator);

来源：https://stackoverflow.com/questions/65459927/error-adding-a-splash-to-my-expo-react-native-app

标签

react-native

react-redux

expo