Question

有多个元素，我希望同时使用react dnd进行可拖动和可拖放。这意味着我需要拖动其中一个元素并将其放在另一个元素上。

首先，我为MyComponent定义了dragSource。这到目前为止工作。但是我如何为同一个组件设置DropTarget呢？

import React, { Component } from 'react'
import { DragSource, DropTarget } from 'react-dnd'

const elementSource = {
  beginDrag (props) {
    return { }
  }
}
const elementTarget = {
  drop (props, monitor) { }
}

function collect (connect, monitor) {
  return {
    connectDragSource: connect.dragSource(),
    isDragging: monitor.isDragging(),
    connectDropTarget: connect.dropTarget(),
    isOver: monitor.isOver()
  }
}

class MyComponent extends Component {
  render () {
    const { connectDragSource, isDragging, connectDropTarget, isOver } = this.props

    return connectDragSource(
      <div style={{ opacity: isDragging ? 0.5 : 1 }} >
        Just an example
      </div>
    )
  }
}

export default DragSource('element', elementSource, collect)(MyComponent)

Answer 1

这可以通过React-DND实现。它需要将可拖动元素导出为Source和Target。

您可以将组件定义为

class MyComponent extends Component {
  render () {
    const { connectDragSource, isDragging, connectDropTarget, isOver } = this.props

    return connectDragSource(connectDropTarget(
      <div style={{ opacity: isDragging ? 0.5 : 1 }} >
        Just an example
     </div>
    ))
  }
}

MyComponent = DragSource('MyComponent', elementSource, (connect, 
monitor) => ({
  connectDragSource: connect.dragSource(),
  isDragging: monitor.isDragging()
}))(MyComponent);

MyComponent = DropTarget('MyComponent', elementTarget, connect => ({
  connectDropTarget: connect.dropTarget(),
}))(MyComponent);

export default MyComponent;

可以使用here的示例。它虽然使用了发电机。

React / Dnd：使组件可拖动并同时放置

1 个答案: