我用一个背景图片和一些图标在它上面制作了一个简单的视图。单击图标可导航到不同的页面。它工作正常。问题是,当我导航到其他页面返回主页并执行此操作7-8次时,背景图像将从所有屏幕中消失。下面是主屏幕和截图的代码
<Image
source={require('../images/background.jpg')}
style={{
justifyContent:'center',
resizeMode: "stretch",
height: height,
width: width,
alignItems: "center"
}} >
<StatusBar
backgroundColor="#4e0870"
barStyle="light-content"
/>
<Image style={{ height: 125, width: 125 }} source={require('../images/guru_logo.png')} />
<View style={{
marginTop: 30,
flexDirection: 'row'
}}>
<TouchableOpacity activeOpacity={.5} onPress={() => {
BackHandler.removeEventListener('hardwareBackPress', this.handleBackButton);
navigate("LiveTV")
}
}
>
<Image
source={require('../images/live.png')}
style={{
resizeMode: "stretch",
height: 75,
width: 75
}} /></TouchableOpacity>
<TouchableOpacity activeOpacity={.5} onPress={() => {
BackHandler.removeEventListener('hardwareBackPress', this.handleBackButton);
navigate("VideoPage")
}}>
<Image
source={require('../images/youtube.png')}
style={{
marginTop: 5,
resizeMode: "stretch",
marginLeft: 100,
height: 75,
width: 75
}} />
</TouchableOpacity>
</View>
<View
style={{
flexDirection: 'row',
marginTop: 20
}}>
<Text
style={{
marginLeft: -5,
fontSize: 20,
color: "#FFF"
}}>Live Tv</Text>
<Text
style={{
fontSize: 20,
color: "#FFF",
marginLeft: 125
}}>Video</Text>
</View>
<View
style={{
flexDirection: 'row',
marginTop: 20
}}>
<TouchableOpacity activeOpacity={.5} onPress={() => {
BackHandler.removeEventListener('hardwareBackPress', this.handleBackButton);
navigate("FacebookPage")
}}>
<Image
source={require('../images/facebook-logo.png')}
style={{
resizeMode: "stretch",
height: 75,
width: 75
}} /></TouchableOpacity>
<TouchableOpacity activeOpacity={.5} onPress={() => {
BackHandler.removeEventListener('hardwareBackPress', this.handleBackButton);
navigate("AudioPage")
}}>
<Image
source={require('../images/icon.png')}
style={{
resizeMode: "stretch",
marginLeft: 100,
height: 75,
width: 75
}} /></TouchableOpacity>
</View>
<View
style={{
flexDirection: 'row',
marginTop: 20
}}>
<Text
style={{
marginLeft: -20,
fontSize: 20,
color: "#FFF"
}}>Facebook</Text>
<Text
style={{
fontSize: 20,
color: "#FFF",
marginLeft: 110
}}>Audio</Text>
</View>
<TouchableOpacity activeOpacity={.5} onPress={() => {
BackHandler.removeEventListener('hardwareBackPress', this.handleBackButton);
navigate("ContactPage")
}}>
<Image
source={require('../images/contact.png')}
style={{
marginTop: 20,
resizeMode: "stretch",
height: 75,
width: 75
}} /></TouchableOpacity>
<Text style={{
fontSize: 20,
color: "#FFF"
}}>Contact Us</Text>
</Image>
每次导航到该屏幕时,它都会调用重新渲染。我在过去找到的工作是将图像源定义为变量,并在source = {HERE}
部分简单地引用它。我在下面提供了一些示例代码。这已经解决了这个问题,让我知道它是怎么回事。
var images = {
live: {img: require('../images/live.png')},
guru: {img: require('../images/guru_logo.png')},
background: {img: require('../images/background.jpg')},
//and so on
}
class SelectionScreen extends Component {
//all your other code
然后在你的Image
组件中
<Image source = {images[background].img}.../>
我认为它可能与这个反应原生问题有关:https://github.com/facebook/react-native/issues/13600
我会尝试: