不多说,直接上代码
react-dnd 需要react版本 > 16.6 ,貌似与react.memo方法有关
import React from 'react'
// DragDropContext 类似React的Context
// DragSource 高阶组件 包裹被拖的元素
// DropTarget 高阶组件 包裹被释放的元素
import {DragDropContext, DragSource, DropTarget} from 'react-dnd';
// HTML5Backend 这个库是必须的,类似于React的合成事件
// 解决浏览器差异,抽象事件操作为可以处理的state
import HTML5Backend from 'react-dnd-html5-backend';
import "./index.css"
const data = [
{id: 10, text: '1'},
{id: 11, text: '2'},
{id: 12, text: '3'},
{id: 13, text: '4'},
{id: 14, text: '5'}
]
const datas = {
data
}
class Item extends React.Component {
constructor(props) {
super(props)
}
render() {
const {connectDragSource, connectDropTarget, move, ...restProps} = this.props;
return (
connectDragSource(
connectDropTarget(
<div {...restProps}>{restProps.text}</div>
)
)
)
}
}
const dragNode = DragSource('li', {
beginDrag(props, monitor, component) {
return {
index: props.index,
};
},
}, connect => ({
connectDragSource: connect.dragSource(),
}))(Item);
const DropNode = DropTarget('li', {
drop(props, monitor) {
const dragIndex = monitor.getItem().index;
const hoverIndex = props.index;
if (dragIndex === hoverIndex) return;
props.move(dragIndex, hoverIndex);
//monitor.getItem().index = hoverIndex;
}
}, function (connect) {
return {
connectDropTarget: connect.dropTarget()
}
}
)(dragNode)
class Demo extends React.Component {
state = datas;
moveRow = (start, end) => {
let {data} = this.state;
let temp = data[start]
data[start] = data[end];
data[end] = temp;
this.setState({data})
}
render() {
return (
<div className='move'>
{
this.state.data.map( (item, index) => {
const prop = {
move: this.moveRow,
key: item.id,
id: item.id,
text: item.text,
index: index
}
return <DropNode {...prop}/>
})
}
</div>
)
}
}
export default DragDropContext(HTML5Backend)(Demo);
**粗体** _斜体_ [链接](http://example.com) `代码` - 列表 > 引用
。你还可以使用@
来通知其他用户。