您的 ListView 不向下移动的关键是将叠加层的定位设置为absolute
。通过这样做,您可以手动设置视图的位置和宽度/高度,它不再遵循 flexbox 布局。查看以下简短示例。叠加层的高度固定为 360,但您可以轻松地为其设置动画或使其动态化。
'use strict';
var React = require('react-native');
var Dimensions = require('Dimensions');
// We can use this to make the overlay fill the entire width
var { width, height } = Dimensions.get('window');
var {
AppRegistry,
StyleSheet,
Text,
View,
} = React;
var SampleApp = React.createClass({
render: function() {
return (
<View style={styles.container}>
<Text style={styles.welcome}>
Welcome to the React Native Playground!
</Text>
<View style={[styles.overlay, { height: 360}]} />
</View>
);
}
});
var styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
// Flex to fill, position absolute,
// Fixed left/top, and the width set to the window width
overlay: {
flex: 1,
position: 'absolute',
left: 0,
top: 0,
opacity: 0.5,
backgroundColor: 'black',
width: width
}
});
AppRegistry.registerComponent('SampleApp', () => SampleApp);
module.exports = SampleApp;