React-Native：更改ImageBackground的不透明度颜色 [英] React-Native: Change opacity colour of ImageBackground

问题描述

我一直在尝试开发下面提到的屏幕：

I have been trying to develop screen mentioned below:

为此，我创建了以下组件：

For that I have created below component:

import React, {Component} from 'react';
import {View, Text, StyleSheet, ImageBackground, Image} from 'react-native';
import Balance from './Balance.js'

class AccountHeader extends React.Component{
    render(){
        return(
            <ImageBackground
                source={require('../images/lawrance.jpg')}
                style={styles.container}>
                    <View style={styles.overlay}></View>
                    <Text style = {[styles.textStyle, {paddingTop: 10}]} >My Account</Text>
                    <Image source= {require('../images/lawrance.jpg')}
                        style={styles.avatarStyle}/>
                    <Text style = {styles.textStyle} > Jenifer Lawrance</Text>
                    <Text style = {styles.textStyle} > [phone]</Text>
                    <Balance style= {styles.balanceContainer}/>
            </ImageBackground>
        );
    }
}

const styles = StyleSheet.create({
    container: {
        backgroundColor:'red',
        opacity: 0.6
    },
    overlay: {
        backgroundColor:'transparent',
        opacity: 0.6
    },
    avatarStyle: {
        width:100, 
        height: 100,
        marginTop: 10,
        borderRadius: 50,
        alignSelf: 'center',
    },
    textStyle: {
        marginTop: 10,
        fontSize: 18,
        color: "#FFFFFF",
        fontWeight: 'bold',
        alignSelf: 'center',
    },
    balanceContainer:{
        padding:10,
    }
  });

export default AccountHeader;

现在有两个问题：

1. 更改 ImageBackground 的不透明度也会更改其子项的不透明度


2. 无法更改颜色不透明度

1. Changing the opacity of ImageBackground also change the opacity of its children
2. Not able to change the color of opacity

任何帮助表示赞赏！

设计屏幕：

已开发的屏幕

< a href =https://i.stack.imgur.com/k8HvU.png =nofollow noreferrer>

推荐答案

使用此代码，它正常工作，我只做了一个小改动

Use this code, it's working, I just made a minor change

import React, {Component} from 'react';
    import {View, Text, StyleSheet, ImageBackground, Image,Dimensions} from 'react-native';

class AccountHeader extends React.Component{
    render(){
        return(
            <ImageBackground
                source={{uri:'https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSoOVTmb0ILbDI6ggGhPKUkn3v4UKc2dNB-Kjng7aGM14UbvzKY'}}
                style={styles.container}>
                    <View style={styles.overlay}>
                    <Text style = {[styles.textStyle, {paddingTop: 10}]} >My Account</Text>
                    <Image source= {{uri:'https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSoOVTmb0ILbDI6ggGhPKUkn3v4UKc2dNB-Kjng7aGM14UbvzKY'}}
                        style={styles.avatarStyle}/>
                    <Text style = {styles.textStyle} > Jenifer Lawrance</Text>
                    <Text style = {styles.textStyle} > [phone]</Text>
                    </View>
            </ImageBackground>
        );
    }
}     

const styles = StyleSheet.create({
  container: {

},            
overlay: {
    backgroundColor:'rgba(255,0,0,0.5)',
},
    avatarStyle: {
        width:100, 
        height: 100,
        marginTop: 10,
        borderRadius: 50,
        alignSelf: 'center',
    },
    textStyle: {
        marginTop: 10,
        fontSize: 18,
        color: "#FFFFFF",
        fontWeight: 'bold',
        alignSelf: 'center',
    },
    balanceContainer:{
        padding:10,
    }
  });

export default AccountHeader;

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