我想从水平FlatList中拖出所选项目并将其拖放到屏幕的另一个区域。问题是我的FlatList包装器必须具有固定的高度,并且当试图将选定的元素拉出时,FlatList组件将其溢出,并且我的元素被隐藏了。
我试图更改zIndex并将overflow设置为visible,但是它无法正常工作,因为设置zIndex仅适用于同级兄弟并且还存在很多错误,overflow:visible根本不影响布局。
import React from 'react';
import {
SafeAreaView,
View,
FlatList,
Text,
StyleSheet,
Animated,
PanResponder
} from 'react-native';
import { v4 } from 'uuid';
export default class App extends React.PureComponent{
state = {
data: [
{ id: v4(), title: 'Lightcoral', hex: '#eb7474' },
{ id: v4(), title: 'Orchid', hex: '#eb74dc' },
{ id: v4(), title: 'Mediumpurple', hex: '#9a74eb' },
{ id: v4(), title: 'Mediumslateblue', hex: '#8274eb' },
{ id: v4(), title: 'Skyblue', hex: '#74b6eb' },
{ id: v4(), title: 'Paleturquoise', hex: '#93ece2' },
{ id: v4(), title: 'Palegreen', hex: '#93ecb6' },
{ id: v4(), title: 'Khaki', hex: '#d3ec93' }
]
}
_position = new Animated.ValueXY()
_panResponder = PanResponder.create({
onStartShouldSetPanResponder: () => true,
onPanResponderMove: (event, gesture) => {
this._position.setValue({ x: gesture.dx, y: gesture.dy})
},
onPanResponderRelease: () => {}
})
_keyExtractor = (item) => item.id;
_renderItem = ({item}) => {
return (
<Animated.View
style={this._position.getLayout()}
{...this._panResponder.panHandlers}
>
<View style={[styles.itemBox, {backgroundColor: `${item.hex}`}]}>
<Text>{item.title}</Text>
</View>
</Animated.View>
)
}
render() {
const { data } = this.state
return (
<SafeAreaView style={styles.safeArea}>
<View style={styles.container}>
<View style={styles.targetArea}>
<Text>Drop HERE!!!</Text>
</View>
<View style={{ height: 80, borderColor: 'black', borderWidth: 2 }}>
<FlatList
data={data}
keyExtractor={this._keyExtractor}
renderItem={this._renderItem}
horizontal={true}
/>
</View>
</View>
</SafeAreaView>
);
}
}
const styles = StyleSheet.create({
safeArea: {
flex: 1
},
container: {
flex: 1,
justifyContent: 'space-between',
alignItems: 'center',
backgroundColor: '#fff',
},
itemBox: {
width: 80,
height: 80,
alignItems: 'center',
justifyContent: 'center',
borderWidth: 1,
borderColor: '#fff'
},
targetArea: {
height: 150,
width: 150,
alignItems: 'center',
justifyContent: 'center',
borderWidth: 1,
borderColor: '#eee',
backgroundColor: '#F5FCFF',
marginTop: 40
}
});
如果我可以通过编程方式设置每个元素的zIndex,我想在屏幕上移动flatList的选定项并将其放在屏幕上任何其他元素的顶部月球,但不幸的是,它似乎没有那么简单。请帮助我,我非常拼命(((
答案 0 :(得分:0)
以FlatList样式将overflow
设置为visible
。