react-native中如何使用ImageBackground设置屏幕背景图片

Question

When I use in react-native it gives warning that using with children is deprecated and will be error in future. User instead.

So, If I use it doesn't give expected result which I was getting using

Here is the code I wrote for using

<ImageBackground source={require('../../img/splash/splash_bg.png')} style={styles.backgroundImage} >
        </ImageBackground>

And style code is

const styles = StyleSheet.create({
backgroundImage: {
    flex: 1,
    // width: undefined,
    // height: undefined,
    // flexDirection: 'column',
    // backgroundColor:'transparent',
    // justifyContent: 'flex-start',


},}

Answer 1

You can use "ImageBackground" component on React Native.

<ImageBackground
  source={yourSourceFile}
  style={{width: '100%', height: '100%'}}
> 
    <....yourContent...>
</ImageBackground>

Answer 2

i achieved this by:

import { ImageBackground } from 'react-native';

<ImageBackground style={ styles.imgBackground } 
                 resizeMode='cover' 
                 source={require('./Your/Path.png')}>

   //place your now nested component JSX code here

</ImageBackground>

And then the Styles:

imgBackground: {
        width: '100%',
        height: '100%',
        flex: 1 
},

Answer 3

Two options:

1. Try setting width and height to width and height of the device screen
2. Good old position absolute

Code for #2:

 render(){
    return(
        <View style={{ flex: 1 }}>
           <Image style={{ width: screenWidth, height: screenHeight, position: 'absolute', top: 0, left: 0 }}/>
           <Text>Hey look, image background</Text>
        </View>
    )
}

Edit : For option #2 you can experiment with resizeMode="stretch|cover"

Edit 2 : Keep in mind that option #2 renders the image and then everything after that in this order, which means that some pixels are rendered twice, this might have a very small performance impact (usually unnoticeable) but just for your information

Answer 4

ImageBackground is a very simple and useful component.Put your component inside ImageBackground as a nested component and tweak a position of your component by using position .

Here's an example.

 <ImageBackground source={{ uri: hoge }} style={{ height: 100, width: 100, position: 'relative', top: 0, left: 0 }} > <Text style={{ fontWeight: 'bold', color: 'white', position: 'absolute', bottom: 0, left: 0 }} > Hello World </Text> </ImageBackground>

Answer 5

Here is a link to the RN docs: https://facebook.github.io/react-native/docs/images

A common feature request from developers familiar with the web is background-image. To handle this use case, you can use the <ImageBackground> component, which has the same props as <Image> , and add whatever children to it you would like to layer on top of it.

You might not want to use <ImageBackground> in some cases, since the implementation is very simple. Refer to <ImageBackground> 's source code for more insight, and create your own custom component when needed.

return (
  <ImageBackground source={require('./image.png')} style={{width: '100%', height: '100%'}}>
    <Text>Inside</Text>
  </ImageBackground>
);

Note that you must specify some width and height style attributes.

Note also that the file path is relative to the directory the component is in.

Answer 6

     <ImageBackground
            source={require("../assests/background_image.jpg")}
            style={styles.container}

        >
            <View
                style={{
                    flex: 1,
                    justifyContent: "center",
                    alignItems: "center"
                }}
            >
                <Button
                    onPress={() => this.props.showImagePickerComponent(this.props.navigation)}
                    title="START"
                    color="#841584"
                    accessibilityLabel="Increase Count"
                />
            </View>
        </ImageBackground>

Please use this code for set background image in react native

Answer 7

const img = '../../img/splash/splash_bg.png';
<ImageBackground  source={{ uri: img }} style={styles.backgroundImage} >
    </ImageBackground>

This worked for me. Reference to RN docs can be found here.I wrote mine by reading this- https://facebook.github.io/react-native/docs/images.html#background-image-via-nesting

Answer 8

To add background Image, React Native is based on component, the ImageBackground Component requires two props style={{}} and source={require('')}

 <ImageBackground source={require('./wallpaper.jpg')} style={{width: '100%', height: '100%'}}> 
<....yourContent Goes here...>
    </ImageBackground>

Answer 9

const { width, height } = Dimensions.get('window')


<View style={{marginBottom: 20}}>
   <Image 
        style={{ height: 200, width: width, position: 'absolute', resizeMode: 'cover' }}
        source={{ uri: 'https://picsum.photos/'+width+'/200/?random' }}
                />
   <View style={styles.productBar}>
       <View style={styles.productElement}>
            <Image
                  style={{ height: 160, width: width - 250, position: 'relative', resizeMode: 'cover' }}
                  source={{ uri: 'https://picsum.photos/'+ 250 +'/160/?random' }}
                        />
       </View>
       <View style={styles.productElement}>
             <Text style={{ fontSize: 16, paddingLeft: 20 }}>Başlık</Text>
             <Text style={{ fontSize: 12, paddingLeft: 20, color: "blue"}}>Alt Başlık</Text>
       </View>
   </View>
</View>



 productBar: {
    margin: 20,
    marginBottom: 0,
    justifyContent: "flex-start" , 
    flexDirection: "row"
  },
  productElement: {
    marginBottom: 0, 
 },

Answer 10

I think this will help u..

import React, { Component } from 'react';
import { homePageStyles } from '../styles/Style';
import { Text, ImageBackground } from 'react-native';
import HomePageWallpaper from '../images/homePageWallpaper.jpg';

export default class Home extends Component {
    render() {
        return (
            <ImageBackground source={HomePageWallpaper} style={{ flex: 1, justifyContent: 'center', width: null, height: null }}>
                <Container>                    
                    <Content>
                        <Text style={homePageStyles.description_text}>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</Text>
                    </Content>
                </Container >
            </ImageBackground>
        );
    }
}

Answer 11

I faced same problem with background image and its child components including logo images. After wasting few hours, I found the correct way to solve this problem. This is surely helped to you.

var {View, Text, Image, ImageBackground} = require('react-native');
import Images from '@assets';

export default class Welcome extends Component {
    render() {
        return (
            <ImageBackground source={Images.main_bg} style={styles.container}>
                <View style={styles.markWrap}>
                    <Image source={Images.main_logo} 
                    style={styles.mark} resizeMode="contain" />
                </View>
                <View style={[styles.wrapper]}>
                    {//Here put your other components}
                </View>              
                
            </ImageBackground>
        );
    }
}

var styles = StyleSheet.create({
    container:{
        flex: 1,
    },
    markWrap: {
        flex: 1,
        marginTop: 83,
        borderWidth:1, borderColor: "green"
      },
    mark: {
        width: null,
        height: null,
        flex: 1,
    },
    wrapper:{
        borderWidth:1, borderColor: "green",///for debug
        flex: 1,
        position:"relative",
    },
}

Logo on background Image

(PS: I put on the dummy image on this screen instead of real company logo.)

Answer 12

您必须先导入背景组件才能在代码上使用背景图像

Answer 13

I was searching Google on how to achieve this in 2021, so I will go ahead and add how I achieved this. NOTE: I am using styled-components in my project. Another thing to mention is that you might not need the additional View component, but I am using the SafeAreaView component inside of the Background component to add the additional spacing below the status bar for iOS.

import styled from 'styled-components';

const Background = styled.ImageBackground`
  flex: 1;
  resize-mode: cover; // Not sure if this helps, but it was used in the docs, listed below
  justify-content: center;
`;

const Container = styled.SafeAreaView`
  flex: 1;
`;

...
return (
  <Background source={require('../assets/image.png')}>
    <Container>
      // rest of your components
    </Container>
  </Background>
)
...

docs

Answer 14

<ImageBackground source=require('../../img/splash/splash_bg.png')} style={styles.backgroundImage} />

Use resizeMode: "contain" Resize the background image to make sure the image is fully visible and resizeMode: "cover" Resize the background image to cover the entire container, even if it has to stretch the image.

const styles = StyleSheet.create({

 carImage: {
   width: "100%",
   height: "100%",
   resizeMode: "cover"
 }
})

Answer 15

.hero-image {
  background-image: url("photographer.jpg"); /* The image used */
  background-color: #cccccc; /* Used if the image is unavailable */
  height: 500px; /* You must set a specified height */
  background-position: center; /* Center the image */
  background-repeat: no-repeat; /* Do not repeat the image */
  background-size: cover; /* Resize the background image to cover the entire container */
}

look result