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这篇文章将为大家详细讲解有关react-beautiful-dnd如何实现组件拖拽,小编觉得挺实用的,因此分享给大家做个参考,希望大家阅读完这篇文章后可以有所收获。
在已有react项目中 执行以下命令 so easy。
# yarn yarn add react-beautiful-dnd # npm npm install react-beautiful-dnd --save
详情查看 官方文档。
3.1 demo1 纵向组件拖拽
效果下图:
demo1.gif
实现代码:
import React, { Component } from "react"; import { DragDropContext, Droppable, Draggable } from "react-beautiful-dnd"; //初始化数据 const getItems = count => Array.from({ length: count }, (v, k) => k).map(k => ({ id: `item-${k + 1}`, content: `this is content ${k + 1}` })); // 重新记录数组顺序 const reorder = (list, startIndex, endIndex) => { const result = Array.from(list); const [removed] = result.splice(startIndex, 1); result.splice(endIndex, 0, removed); return result; }; const grid = 8; // 设置样式 const getItemStyle = (isDragging, draggableStyle) => ({ // some basic styles to make the items look a bit nicer userSelect: "none", padding: grid * 2, margin: `0 0 ${grid}px 0`, // 拖拽的时候背景变化 background: isDragging ? "lightgreen" : "#ffffff", // styles we need to apply on draggables ...draggableStyle }); const getListStyle = () => ({ background: 'black', padding: grid, width: 250 }); export default class ReactBeautifulDnd extends Component { constructor(props) { super(props); this.state = { items: getItems(11) }; this.onDragEnd = this.onDragEnd.bind(this); } onDragEnd(result) { if (!result.destination) { return; } const items = reorder( this.state.items, result.source.index, result.destination.index ); this.setState({ items }); } render() { return ( <DragDropContext onDragEnd={this.onDragEnd}> <center> <Droppable droppableId="droppable"> {(provided, snapshot) => ( <div //provided.droppableProps应用的相同元素. {...provided.droppableProps} // 为了使 droppable 能够正常工作必须 绑定到最高可能的DOM节点中provided.innerRef. ref={provided.innerRef} style={getListStyle(snapshot)} > {this.state.items.map((item, index) => ( <Draggable key={item.id} draggableId={item.id} index={index}> {(provided, snapshot) => ( <div ref={provided.innerRef} {...provided.draggableProps} {...provided.dragHandleProps} style={getItemStyle( snapshot.isDragging, provided.draggableProps.style )} > {item.content} </div> )} </Draggable> ))} {provided.placeholder} </div> )} </Droppable> </center> </DragDropContext> ); } }
3.2 demo2 水平拖拽
效果下图:
demo2.gif
实现代码: 其实和纵向拖拽差不多 Droppable 中 多添加了一个排列顺序的属性,direction="horizontal"
import React, { Component } from "react"; import { DragDropContext, Droppable, Draggable } from "react-beautiful-dnd"; const getItems = count => ( Array.from({ length: count }, (v, k) => k).map(k => ({ id: `item-${k + 1}`, content: `this is content ${k + 1}` })) ) // 重新记录数组顺序 const reorder = (list, startIndex, endIndex) => { const result = Array.from(list); //删除并记录 删除元素 const [removed] = result.splice(startIndex, 1); //将原来的元素添加进数组 result.splice(endIndex, 0, removed); return result; }; const grid = 8; // 设置样式 const getItemStyle = (isDragging, draggableStyle) => ({ // some basic styles to make the items look a bit nicer userSelect: "none", padding: grid * 2, margin: `0 ${grid}px 0 0 `, // 拖拽的时候背景变化 background: isDragging ? "lightgreen" : "#ffffff", // styles we need to apply on draggables ...draggableStyle }); const getListStyle = () => ({ background: 'black', display: 'flex', padding: grid, overflow: 'auto', }); class ReactBeautifulDndHorizontal extends Component { constructor(props) { super(props); this.state = { items: getItems(10) }; this.onDragEnd = this.onDragEnd.bind(this); } onDragEnd(result) { if (!result.destination) { return; } const items = reorder( this.state.items, result.source.index, result.destination.index ); this.setState({ items }); } render() { return ( <DragDropContext onDragEnd={this.onDragEnd}> <Droppable droppableId="droppable" direction="horizontal"> {(provided, snapshot) => ( <div {...provided.droppableProps} ref={provided.innerRef} style={getListStyle(snapshot.isDraggingOver)} > {this.state.items.map((item, index) => ( <Draggable key={item.id} draggableId={item.id} index={index}> {(provided, snapshot) => ( <div ref={provided.innerRef} {...provided.draggableProps} {...provided.dragHandleProps} style={getItemStyle( snapshot.isDragging, provided.draggableProps.style )} > {item.content} </div> )} </Draggable> ))} {provided.placeholder} </div> )} </Droppable> </DragDropContext> ) } } export default ReactBeautifulDndHorizontal
3.3 demo3实现一个代办事项的拖拽(纵向 横向拖拽)
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