我想在我的本机应用程序中为所有屏幕设置背景图像,
我正在像这样在组件树的顶层使用ImageBackground组件:
export default class App extends React.Component {
render(){
return(
<View style={{ flex: 1 }}>
<ImageBackground source={require('../assets/app-bg.png')} style={{width: '100%', height: '100%', flex: 1, zIndex: 0, resizeMode: 'cover' }}>
<Router />
</ImageBackground>
</View>)
}
}
,我有子组件,它是react-navigation中的路由器 像这样:
class LandingPage extends React.Component {
render(){
return(
<View style={{flex: 1, zIndex: 999}}>
<Text>here is landing page></Text>
</View>
)
}
}
const RouterNavigator = createAppContainer(createStackNavigator({
Landing: {
screen: Landing,
navigationOptions:{
header: null
}
}
}
export default class Router extends React.Component {
render() {
return <RouterNavigator style={{flex: 1}}/>
}
}
问题在于,尽管正在渲染背景图像,但是子组件LandingPage也被隐藏了!
答案 0 :(得分:0)
只看这个例子。这是否可以帮助您实现您想做的事情?
import * as React from 'react';
import { Text, View, StyleSheet, ImageBackground } from 'react-native';
import { Constants } from 'expo';
import AssetExample from './components/AssetExample';
import { createAppContainer, createStackNavigator } from 'react-navigation';
import { Card } from 'react-native-paper';
class LandingPage extends React.Component {
render() {
return (
<View>
<Text>here is landing page</Text>
</View>
);
}
}
const RouterNavigator = createAppContainer(
createStackNavigator(
{
LandingPage: {
screen: LandingPage,
navigationOptions: {
header: null,
},
},
},
{
mode: 'card',
transparentCard: true,
cardStyle: { backgroundColor: 'transparent' },
transitionConfig: () => ({
containerStyle: {
backgroundColor: 'transparent',
},
}),
initialRouteName: 'LandingPage',
}
)
);
export default class App extends React.Component {
render() {
return (
<ImageBackground
source={require('./bgimage.jpeg')}
style={{
flex: 1,
}}>
<RouterNavigator />
</ImageBackground>
);
}
}