本教程操作环境：Windows10系统、react18.0.0版、Dell G3电脑。
(资料图)
react 自定义拖拽排序列表
一、背景
最近在公司开发时，遇到需要自定表单，并且自定表单中的单选和复选选项需要用户可以自定义拖拽排序，经过一个星期的查阅各种资料和实践，写个总结！
二、实践
经过一系列的查询，发现React Sortable与array-move可以实现这一功能！
附上官网链接React Sortable Higher-order Components
对应git源码 https://www.php.cn/link/64bba6f0069347b04a9de74a54352890
因此借鉴官网案例开始我们的对应的需求开发！
要实现是需要三个主要组件。
1、SortableContainer整体实现移动的容器
<SortableContainer onSortEnd={onSortEnd} useDragHandle> { radioList.map((item,index)=>{ return( <SortableItem key={`item-${item.id}`} index={index} item = {item} num={index} /> ) }) }</SortableContainer>我们将整体设置成一个无序列表，将子元素放置li内，方便我们进行排序！
const SortableContainer = sortableContainer(({children}) => { return <ul>{children}</ul>;onSortEnd移动完毕后执行的函数
const onSortEnd = ({oldIndex, newIndex}) => { var arry1 = arrayMoveImmutable(radioList,oldIndex,newIndex) setRadioList(arry1); };useDragHandle移动的控件（焦点）---如果不需要可以不写
const DragHandle = sortableHandle(() => <UnorderedListOutline style = {{position:"absolute",right:"30px",top:"10px",display:isEdit == true ? "":"none"}}/>);2、SortableItem 移动的对象
const SortableItem = sortableElement(({item,num}) => ( <li> <Radio key = {item.id} value = {item.value} style = {{width:"100%",position:"relative"}} > <Input style = {{border:"none",width:"96%"}} placeholder = {`选项${num+1}`} defaultValue={item.value} onBlur = {(e)=>{ item.value = e.target.value console.log(item.value); setRadioList([...radioList])}} readOnly = {isEdit == true ? "":"none"}></Input> <DragHandle /> <CloseCircleOutline onClick = {()=>{deleteRadio(item)}} style = {{position:"absolute",right:"10px",top:"10px",display:isEdit == true ? "":"none"}}/> </Radio> </li> ));对象需要自己构建,我这边由于元素比较多，所以看起来比较复杂。
我们的需求是需要在Radio.Group中进行Radio的移动。所以将Radio封装到SortableItem中。
其中，接受的参数可以自定义，但需要和
中的名字对应起来，其中不能用index作为参数名。
3、arrayMoveImmutable 数组重新排序函数
const onSortEnd = ({oldIndex, newIndex}) => { var arry1 = arrayMoveImmutable(radioList,oldIndex,newIndex) setRadioList(arry1); };arrayMoveImmutable函数接受3个参数，一个是操作的数组，一个是操作元素原本的index，一个是新的操作元素所放置的index。函数返回移动完毕的数组。
三、整体效果
因此，我们的操作步骤结束，整体代码。没有导入的包需要自行npm 安装！
import React, { useState,useEffect } from "react";import { Input,Radio, Button,Space,Checkbox,Form } from "antd";import { DeleteOutline, CloseCircleOutline,UnorderedListOutline } from "antd-mobile-icons"import { Dialog, Toast, Divider } from "antd-mobile"import { sortableContainer, sortableElement, sortableHandle,} from "react-sortable-hoc";import {arrayMoveImmutable} from "array-move";const RadioComponent = (props) => { const {onDelete,onListDate,componentIndex,setIsEdit,isEdit,componentTitle,componentDate,previewVisible} = props; const [radioList,setRadioList] = useState([]) const [remark, setRemark] = useState(false) const [required, setRequired] = useState(false) const [radioTitle, setRadioTitle] = useState("") const [id, setId] = useState(2) const [radioId, setRadioId] = useState(111211) useEffect(()=>{ if(componentDate !== undefined){ setRadioList(componentDate) }else{ setRadioList([{id:0,value:""},{id:1,value:""}]) } },[componentIndex]) useEffect(()=>{ if(isEdit === false && previewVisible === undefined){ onListDate(radioList,radioTitle,required,remark) } },[isEdit]) const onChange = (e) => { console.log(e.target.value); setRequired(e.target.checked) }; // 添加备注 const addRemark = ()=>{ setRemark(true) } // 删除备注 const deleteRemark = ()=>{ setRemark(false) } // 删除选项 const deleteRadio = (item)=>{ console.log(item); if(radioList.indexOf(item) > -1){ radioList.splice(radioList.indexOf(item),1) } setRadioList([...radioList]) } const SortableItem = sortableElement(({item,num}) => ( <li> <Radio key = {item.id} value = {item.value} style = {{width:"100%",position:"relative"}} > <Input style = {{border:"none",width:"96%"}} placeholder = {`选项${num+1}`} defaultValue={item.value} onBlur = {(e)=>{ item.value = e.target.value console.log(item.value); setRadioList([...radioList])}} readOnly = {isEdit == true ? "":"none"}></Input> <DragHandle /> <CloseCircleOutline onClick = {()=>{deleteRadio(item)}} style = {{position:"absolute",right:"10px",top:"10px",display:isEdit == true ? "":"none"}}/> </Radio> </li> )); const onSortEnd = ({oldIndex, newIndex}) => { var arry1 = arrayMoveImmutable(radioList,oldIndex,newIndex) setRadioList(arry1); }; const DragHandle = sortableHandle(() => <UnorderedListOutline style = {{position:"absolute",right:"30px",top:"10px",display:isEdit == true ? "":"none"}}/>); const SortableContainer = sortableContainer(({children}) => { return <ul>{children}</ul>;}); return( <div id = {componentIndex} style = {{backgroundColor:"#fff", paddingTop:"10px",paddingLeft:"20px"}} > <span style = {{display: required == true ? "":"none",color:"red",fontSize:"20px"}}>*</span> <span style={{fontWeight:"bold",fontSize:"14px"}}>{componentIndex} [单选]</span> <Input placeholder = "请输入问题" defaultValue = {radioTitle === ""? componentTitle:componentTitle} autoFocus style = {{width:"80%",border:"none",paddingLfet:"5px"}} onBlur={e=>{setRadioTitle(e.target.value);}} readOnly = {isEdit == true ? "":"none"} > </Input> <Radio.Group style = {{display:"block"}}> <SortableContainer onSortEnd={onSortEnd} useDragHandle > { radioList.map((item,index)=>{ return( <SortableItem key={`item-${item.id}`} index={index} item = {item} num={index} /> ) }) } </SortableContainer> </Radio.Group> <div style = {{display:remark == true ? "":"none",fontSize:"14px"}}> <span>备注</span><Input style={{border:"none",width:"80%"}} placeholder="请输入" readOnly = {isEdit == true ? "":"none"}></Input> <DeleteOutline onClick={deleteRemark} style={{float:"right",margin:"10px",display:isEdit == true ? "":"none"}}/> </div> <div style={{display:isEdit == true ? "":"none"}}> <Button type="link" onClick={()=>{setRadioList([...radioList,{id:id,value:""}]);setId(id+1);console.log(radioList);}}>添加选项</Button> <span style={{display:remark == false ? "":"none"}}>|</span> <Button type="link" style={{display:remark == false ? "":"none"}} onClick={addRemark}>添加[备注]项</Button> <div style={{borderTop:"1px #d7d7d7 solid ",paddingTop:"10px",marginTop:"15px",marginLeft:"-15px"}}> <Checkbox onChange={onChange}>必填</Checkbox> <DeleteOutline onClick={async () => { const result = await Dialog.confirm({ content: "是否确定删除该题目？", }) if (result) { Toast.show({ content: "点击了确认", position: "bottom" }) onDelete(componentIndex) } else { Toast.show({ content: "点击了取消", position: "bottom" }) } }} style={{float:"right",margin:"10px"}} /> </div> </div> </div> ) }export default RadioComponent推荐学习：《react视频教程》
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