I'm building a React Native application in expo, and am trying to use a gif file for a splash animation. I've configured my code as follows using expo-splash-screen, however nothing is rendered when I try to load the app. Any suggestions?
Here's the root of my app App.js
import 'react-native-gesture-handler';
import React, { useCallback,useState } from 'react'
import { StyleSheet, Text, View } from 'react-native';
import { NavigationContainer } from '#react-navigation/native';
import { MyStack } from './routes/homeStack';
import { useFonts } from 'expo-font';
import * as SplashScreen from 'expo-splash-screen'
import * as Sentry from 'sentry-expo';
import Splash from './components/Splash';
SplashScreen.preventAutoHideAsync();
export default function App() {
const [appIsReady, setAppIsReady] = useState(false);
const [ fontsLoaded ] = useFonts({
'Sofia-Pro': require('./assets/Sofia_Pro_Regular.otf'),
'Helvetica-Neue': require('./assets/HelveticaNeue-Medium.otf')
})
const onLayoutRootView = useCallback(async () => {
if (fontsLoaded) {
await SplashScreen.hideAsync();
}
}, [fontsLoaded]);
if (!fontsLoaded) {
return <Splash/>
}
return (
<NavigationContainer onLayout={onLayoutRootView}>
<MyStack/>
</NavigationContainer>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
And here's my splash animation component Splash.tsx
import React from 'react'
import { Image,StyleSheet,View } from 'react-native'
const Splash = () => {
return (
<View style = {styles.container}>
<Image
style = {styles.image}
source ={require('../assets/splash_animation.gif')}
/>
</View>
)
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
},
image: {
width: '100%',
height: '100%',
resizeMode: 'contain',
},
});
export default Splash
Related
My app is not loading after splash screen. It just stuck there.
So I added expo-splash-screen and still is not passing the splash screen. Before adding splash screen everything was working fine :(
See this is my App.js code. As you can see it only holds the navigation container which holds the links to other screens including the main home screen.
import {StatusBar } from 'expo-status-bar';
import { StyleSheet } from 'react-native';
import { createNativeStackNavigator } from '#react-navigation/native-stack';
import { MaterialIcons } from "#expo/vector-icons";
import { HomeNavigator } from './CustomNavigation';
import * as Font from 'expo-font';
import * as SplashScreen from 'expo-splash-screen';
import { NavigationContainer } from '#react-navigation/native';
import { createBottomTabNavigator } from '#react-navigation/bottom-tabs';
import FavouritesScreen from './src/screens/FavouritesScreen'
import HomeScreen from './src/screens/HomeScreen';
import MoreOptions from './src/screens/MoreOptions'
import React, { useEffect, useState } from 'react'
console.reportErrorsAsExceptions = false; //to hide touch warning
const Stack = createNativeStackNavigator()
const Tab = createBottomTabNavigator();
SplashScreen.preventAutoHideAsync();
export default function App() {
const [fontLoaded, setFontLoaded] = useState(false)
const [appIsReady, setAppIsReady] = useState(false);
useEffect(() => {
async function prepare() {
try {
await Font.loadAsync(Entypo.font);
await new Promise(resolve => setTimeout(resolve, 2000));
} catch (e) {
console.warn(e);
} finally {
// Tell the application to render
setAppIsReady(true);
}
}
prepare();
}, []);
const onLayoutRootView = useCallback(async () => {
if (appIsReady) {
await SplashScreen.hideAsync();
}
}, [appIsReady]);
if (!appIsReady) {
return null;` `
}
return (
<View
style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}
onLayout={onLayoutRootView}>
<StatusBar barStyle="dark-content" hidden={false} backgroundColor="#ff3b3b" translucent={true} />
<NavigationContainer>
//it contains nothing but the navigation code
</NavigationContainer>
</View>)
Please tell me where and what I'm doing wrong here.
I give you the working example please check it
then after you don't understand let me know
code
import React, { useRef, useEffect } from 'react';
import { StyleSheet, View, Image, StatusBar, Text } from 'react-native';
/**
* RN libraries
*/
import { useNavigation } from '#react-navigation/native';
export default function Splash() {
const animation = useRef(null);
const navigation = useNavigation();
useEffect(() => {
animation.current?.play();
navigation.addListener('focus', () => {
animation.current?.play();
});
setTimeout(() => {
navigate();
}, 2500);
}, []);
const navigate = () => {
navigation.navigate('Home');
};
return (
<View style={styles.animationContainer}>
<Text
style={{
textAlign: 'center',
fontSize: 50,
fontStyle: 'italic',
fontFamily: 'Poppins-Medium',
fontWeight: '800',
color: '#fff',
}}>
Online{'\n'}Education
</Text>
<Text
style={{ color: '#fff', fontSize: 20, fontFamily: 'Poppins-Medium' }}>
Free{'\n'}
</Text>
<View
style={{
backgroundColor: '#5D6CFA',
width: 169,
height: 117,
borderRadius: 60,
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'center',
}}>
{/* <Text style={{color:"#000",fontFamily:'Poppins-Bold',fontSize:25}}>Let's start</Text> */}
</View>
</View>
);
}
const styles = StyleSheet.create({
animationContainer: {
backgroundColor: '#000',
alignItems: 'center',
justifyContent: 'center',
flex: 1,
},
});
Maybe pass your setAppIsReady(true); after the finally and then remove it like this
React.useEffect(() => {
async function prepare() {
try {
// Pre-load fonts, make any API calls you need to do here
AsyncStorage.setItem("alreadyAppLaunched", "true")
await LoadFonts()
await checkOsDarkMode()
await stores.AuthStore.getAllData()
} catch (e) {
console.warn(e);
}
setReady(true);
}
prepare()
}, [])
I am new to react-native. I am trying to configure header styles for my app, but it's not working
App.js
import { StatusBar } from 'expo-status-bar';
import React, {useState} from 'react';
import { StyleSheet, Text, View } from 'react-native';
import MealNavigator from './navigation/MealsNavigator';
export default function App() {
return (
<MealNavigator />
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
The following js file i am using for navigation
MealsNavigator.js
import { createStackNavigator } from 'react-navigation-stack';
import { createAppContainer } from "react-navigation";
import categoriesScreen from '../screens/categoriesScreen';
import categoryMealScreen from '../screens/categoryMealScreen';
import mealDetailScreen from '../screens/mealDetailScreen';
const MealNavigator = createStackNavigator({
Categories : categoriesScreen,
CategoryMeals : categoryMealScreen,
MealDetail : mealDetailScreen
});
export default createAppContainer(MealNavigator);
The following is the screen where i am trying to configure the header
categoriesScreen.js
import React from 'react';
import {Text,View,Button,FlatList,StyleSheet,TouchableOpacity, Platform} from 'react-native';
import { CATEGORIES } from '../data/dummydata';
const CategoriesScreen = props => {
const renderGrid=(itemData) =>{
return(
<TouchableOpacity style={styles.gridItem} onPress={() =>{props.navigation.navigate({routeName:'CategoryMeals'});}}>
<View>
<Text>{itemData.item.title}</Text>
</View>
</TouchableOpacity>
)
};
return(
<View style={styles.container}>
<FlatList
data={CATEGORIES} renderItem={renderGrid} numColumns={2} />
</View>
);
}
CategoriesScreen.defaultNavigationOptions = ({ navigation }) =>({
title:'Meal Categories',
headerTitleStyle: {
textAlign: "left",
fontSize: 24
},
});
const styles = StyleSheet.create({
container:{
flex:1,
justifyContent:'center',
alignItems:'center'
},
gridItem:{
flexGrow:1,
padding: 20,
margin: 15,
height: 150,
}
});
export default CategoriesScreen;
The following is the dummy data i am using
dummydata.js
import Category from '../models/category';
export const CATEGORIES = [
new Category('c1','Indian','#f5428d'),
new Category('c2','Chinese','#f54242'),
new Category('c3','Thai','#f5a442'),
new Category('c4','Malaysian','#f5d142'),
new Category('c5','Arabian','#368dff'),
new Category('c6','South Indian','#41d95d'),
new Category('c7','Kerala','#9eecff'),
new Category('c8','Bengali','#b9ffb0'),
new Category('c9','Mexican','#ffc7ff'),
new Category('c10','Italian','#47fced'),
];
Following is category class file
category.js
class Category{
constructor(id,title,color){
this.id = id;
this.title = title;
this.color = color;
}
};
export default Category;
Everything else is working, just the header configuration is not working.I am using react navigation version 4
you can cofigure header using navigation.setOptions like this:
import React from 'react';
import {Text,View,Button,FlatList,StyleSheet,TouchableOpacity, Platform} from 'react-native';
import { CATEGORIES } from '../data/dummydata';
const CategoriesScreen = props => {
React.useLayoutEffect(() => {
props.navigation.setOptions({
headerTitle: 'Meal Categories',
headerTitleStyle: {
textAlign: "left",
fontSize: 24
},
});
},
const renderGrid=(itemData) =>{
return(
<TouchableOpacity style={styles.gridItem} onPress={() =>{props.navigation.navigate({routeName:'CategoryMeals'});}}>
<View>
<Text>{itemData.item.title}</Text>
</View>
</TouchableOpacity>
)
};
return(
<View style={styles.container}>
<FlatList
data={CATEGORIES} renderItem={renderGrid} numColumns={2} />
</View>
);
}
const styles = StyleSheet.create({
container:{
flex:1,
justifyContent:'center',
alignItems:'center'
},
gridItem:{
flexGrow:1,
padding: 20,
margin: 15,
height: 150,
}
});
export default CategoriesScreen;
I found a different solution to my problem. I used defaultNavigationOptions in my navigation file.
MealsNavigator.js
import { createStackNavigator } from 'react-navigation-stack';
import { createAppContainer } from "react-navigation";
import categoriesScreen from '../screens/categoriesScreen';
import categoryMealScreen from '../screens/categoryMealScreen';
import mealDetailScreen from '../screens/mealDetailScreen';
import {Platform} from 'react-native';
import colors from '../constants/colors';
const MealNavigator = createStackNavigator({
Categories : {
screen : categoriesScreen,
navigationOptions : {
headerTitle:'Meal Categories',
}
},
CategoryMeals : {
screen : categoryMealScreen
},
MealDetail : mealDetailScreen
},
{
defaultNavigationOptions:{
headerTitleStyle:{
backgroundColor:Platform.OS==='android' ? colors.primaryColor : 'white'
},
headerTintColor:Platform.OS==='android' ? 'white' : colors.primaryColor
}
}
);
export default createAppContainer(MealNavigator);
Thanks to everybody for your help.
I want to move to a different screen when I have some AsyncStorage item for authFlow but when I am going to the next screen and construction is calling out the function it is not moving to the next screen.
I tried to use the basic method this.props.navigation.navigate('navigator_name'), but i think it's not moving as blank screen is appearing.
App.js
------
import React from 'react';
import { StyleSheet, View, Text } from 'react-native';
import { createSwitchNavigator, createAppContainer, } from 'react-navigation';
import { createStackNavigator } from 'react-navigation-stack';
import AuthLoadingScreen from './screens/auth-loading-screen';
import WelcomeScreen from './screens/welcomeScreen';
import AppHomeScreen from './screens/app-home-screen';
const AuthStackNavigator = createStackNavigator({
welcome: WelcomeScreen
})
// export default
const TestContainer = createAppContainer(createSwitchNavigator({
AuthLoading: AuthLoadingScreen,
Auth: AuthStackNavigator,
App: AppHomeScreen,
},
{
initialRouteName: 'AuthLoading',
}
))
export default class App extends React.Component {
constructor () {
super()
this.state = {
loggedIn: 'false',
}
}
render() {
return(
<View style={styles.container}>
<TestContainer />
</View>
)
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
auth-loading-screen
-------------------
import React, { Component } from 'react';
import { View, Text, StyleSheet, ActivityIndicator, AsyncStorage } from 'react-native';
export default class AuthLoadingScreen extends Component {
constructor (props) {
super(props);
console.log('calling _loadApp')
this._loadApp();
}
_loadApp = async() => {
const userToken = await AsyncStorage.getItem('userToken');
console.log('getting value of token ', userToken, JSON.stringify(this.props.navigation.actions))
this.props.navigation.navigate(userToken ? 'App' : 'Auth')
}
render() {
return (
<View style={styles.container}>
<ActivityIndicator />
</View>
)
}
}
const styles = StyleSheet.create ({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center'
}
})
welcomeScreen
-------------
import React, { Component } from 'react';
import { View, Text, StyleSheet, Button} from 'react-native';
export default class WelcomeScreen extends Component {
constructor (props) {
super(props);
}
render() {
return (
<View style={styles.container}>
<Text>Welcome</Text>
</View>
)
}
}
const styles = StyleSheet.create ({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center'
}
})
The screen should directly move to the welcomeScreen as item is not set through AsynStorage
Your function is asynchronous. However, the constructor cannot execute the asynchronous function. Therefore, you should change the position of executing the function.
async componentDidMount() {
await this._loadApp();
}
I have created a separate route file and when I am trying to navigate between screens with the help of these routes with react-navigation using stackNavigator I am getting this error I have already tried other solutions available on Stack overflow but none of the answers solve my problem here is my code.
This is my Route.js file
import { createAppContainer, createStackNavigator } from 'react-navigation';
import Login from './screens/Login';
import Register from './screens/Register';
import Start from './screens/Start';
const AppNavigator = createStackNavigator({
Home: {
screen: Start,
},
LoginScreen: {
screen: Login,
},
RegisterScreen: {
screen: Register,
},
}, {
initialRouteName: 'Home',
navigationOptions: {
header: null
}
});
export default createAppContainer(AppNavigator);
And this is my component where I am trying to navigate
import React,{ Component } from 'react';
import { StyleSheet, View, KeyboardAvoidingView,Text } from 'react-native';
import NewButtons from './NewButtons';
import Logo from './Logo';
export default class Start extends Component{
constructor () {
super();
}
loginPress = () => {
this.props.navigation.navigate('LoginScreen');
}
registerPress = () => {
this.props.navigation.navigate('RegisterScreen');
}
render(){
return(
<KeyboardAvoidingView behavior='padding' style={styles.wrapper}>
<View style={styles.logoContainer}>
<Logo/>
<Text style={styles.mainHead}>Welcome to Food Zone</Text>
<Text style={{margin: 10, textAlign:'center'}}>Check out our menus, order food and make reservations{"\n"}{"\n"}</Text>
<NewButtons text="Login"
onPress={this.loginPress}/>
<NewButtons text="Register"
onPress={this.registerPress}/>
</View>
</KeyboardAvoidingView>
);
}
}
const styles = StyleSheet.create({
logoContainer: {
alignItems: 'center',
},
mainHead: {
fontFamily: 'PatuaOne',
color: '#ff9900',
fontSize: 28,
marginTop: -50,
},
})
And this in my button component
import React,{ Component } from 'react';
import { StyleSheet, View,Dimensions } from 'react-native';
import { Button, Text } from 'native-base';
const {width:WIDTH} = Dimensions.get('window')
export default class NewButtons extends Component{
constructor(props){
super(props);
}
handlePress = () => {
this.props.onPress();
}
render(){
return(
<View style={styles.ButtonContainer}>
<Button light style={styles.mainButtons} onPress={this.handlePress()}>
<Text style={styles.textProps}>{this.props.text}</Text>
</Button>
</View>
);
}
}
const styles = StyleSheet.create({
textProps:{
fontFamily: 'PatuaOne',
color: '#ffffff',
},
mainButtons: {
backgroundColor: "#ff9900",
width: 250,
margin: 5,
color: '#ffffff',
justifyContent: 'center',
width: WIDTH -75,
borderRadius: 10,
},
ButtonContainer: {
alignItems: 'center',
}
})
I managed to remove this error by importing routes in App.js file and by calling it in index.js here is my code of App.js file.
import React, {Component} from "react";
import Routes from "./Routes";
const App = () => <Routes/>
export default App;
I'm getting an error that undefined is not a function(evaluating 'this.props.addTodo(text)')
my code was working fine before i introduces the react-navigation as after that i want to add a todo from my second screen i.e. Counter and want to see whether the list on screen one gets updated or not. but i got stuck at adding a todo on first screen as it is throwing the above error.
I'm a complete begginner in React-native and Redux and also in Js. Btw thanks and in advance
and here is my code:
App.js
import React from 'react';
import { StyleSheet, Text, View, AppRegistry } from 'react-native';
import TodoApp from './src/TodoApp'
import store from './app/store/index'
import { Provider } from 'react-redux'
import {CounterR} from './app/counterR';
import {Counter} from './app/counter';
import {createStackNavigator, createAppContainer} from 'react-
navigation'
export default class App extends React.Component {
render() {
return (
<Provider store={store}>
<AppContainer />
</Provider>
);
}
}
const stack = createStackNavigator({
Home: CounterR,
Second: Counter
},{
initialRouteName: 'Home'
})
const AppContainer = createAppContainer(stack)
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
});
CounterR.js
import React, { Component } from 'react';
import {View,
TouchableOpacity,
Text,
Dimensions,
StyleSheet,
TextInput,
FlatList,
Keyboard} from 'react-native';
import {connect} from 'react-redux'
import { addTodo } from './actions/index'
import { toggleTodo } from './actions/index'
import {NavigationAction} from 'react-navigation'
import store from './store/index'
import { Provider } from 'react-redux'
const { width, height } = Dimensions.get("window");
export class CounterR extends Component{
state = {
text: ""
}
add = text => {
Keyboard.dismiss()
this.props.addTodo(text)
this.setState({text: ""})
}
render(){
return(
<View style={styles.container}>
<TextInput
style={{borderWidth:.5, width: 300, height: 40}}
defaultValue={this.state.text}
onChangeText={(value) => this.setState({text:value})}/>
<TouchableOpacity
onPress={() => this.add(this.state.text)}>
<Text
style={{fontSize: 18}}>ADD TODO</Text>
</TouchableOpacity>
<TouchableOpacity
onPress={() => this.props.navigation.navigate('Second')}>
<Text
style={{fontSize: 18}}>Second Screen</Text>
</TouchableOpacity>
<FlatList
data= {this.props.todos}
numColumns={1}
keyExtractor= {item => item.id}
renderItem ={({ item }) =>
<TouchableOpacity
onPress={() => this.props.toggleTodo(item)}
style={styles.todoText}>
<Text style={{textDecorationLine: item.completed ? 'line-through' : 'none', fontSize: 20}}>{item.text}</Text>
</TouchableOpacity>
}
/>
</View>
)
}
}
const mapStateToProps = state => ({
todos: state.todos
})
const mapDispatchToProps = dispatch => ({
addTodo: text => dispatch(addTodo(text)),
toggleTodo: item => dispatch(toggleTodo(item))
})
export default connect(mapStateToProps, mapDispatchToProps)(CounterR)
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,
},
todoText: {
width: width,
margin: 10
}
});
Counter.js
import React, { Component } from 'react';
import {View,
TouchableOpacity,
Text,
Dimensions,
StyleSheet,
TextInput,
FlatList,
Keyboard} from 'react-native';
import {connect} from 'react-redux'
import { addTodo } from './actions/index'
import { toggleTodo } from './actions/index'
import { Provider } from 'react-redux'
import store from './store/index'
const { width, height } = Dimensions.get("window");
export class Counter extends Component{
state = {
text: "",
}
addTodo = text => {
Keyboard.dismiss()
this.props.addTodo(text)
this.setState({text: ""})
}
render(){
return(
<View style={styles.container}>
<TextInput
style={{borderWidth:.5, width: 300, height: 40}}
defaultValue={this.state.text}
onChangeText={(value) => this.setState({text: value})}/>
<TouchableOpacity
onPress={() => this.addTodo(this.state.text)}>
<Text
style={{fontSize: 18}}>ADD TODO</Text>
</TouchableOpacity>
</View>
)
}
}
const mapStateToProps = state => ({
todos: state.todos
})
const mapDispatchToProps = dispatch => ({
addTodo: text => dispatch(addTodo(text)),
toggleTodo: item => dispatch(toggleTodo(item))
})
export default connect(mapStateToProps, mapDispatchToProps)(Counter)
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,
},
todoText: {
width: width,
margin: 10
}
});
app/actions/index.js
import {Keyboard} from 'react-native'
import { ADD_TODO, TOGGLE_TODO } from './actionTypes'
let x = 0
export const addTodo = (text) => ({
type: ADD_TODO,
id: x++,
text: text
})
export const toggleTodo = (item) => ({
type: TOGGLE_TODO,
id: item.id
})
app/actions/actionTypes.js
export const ADD_TODO = 'ADD_TODO'
export const TOGGLE_TODO = 'TOGGLE_TODO'
app/reducers/index.js
import { combineReducers } from 'redux'
import todos from './todos'
export default combineReducers({
todos
})
app/reducers/todos.js
const todos = (state =[], action) => {
switch(action.type){
case 'ADD_TODO':
return [
...state, {
id: action.id,
text: action.text,
completed: false
}
]
case 'TOGGLE_TODO':
return state.map(todo =>
(todo.id === action.id)
?
{...todo, completed: !todo.completed}
:
todo)
default:
return state
}
}
export default todos
app/store/index.js
import { createStore } from 'redux'
import rootReducer from '../reducers'
export default store = createStore(rootReducer)