react实现列表排序的方法:1、将整体设置成一个无序列表,并将子元素放置li内;2、在“Radio.Group”中进行Radio的移动;3、通过arrayMoveImmutable数组重新排序函数实现列表排序即可。
本教程操作环境:Windows10系统、react18.0.0版、Dell G3电脑。
react 自定义拖拽排序列表
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!
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 //m.sbmmt.com/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。
<SortableContainer onSortEnd={onSortEnd} useDragHandle> { radioList.map((item,index)=>{ return( <SortableItem key={`item-${item.id}`} index={index} item = {item} num={index} /> ) }) } </SortableContainer>
我们将整体设置成一个无序列表,将子元素放置li内,方便我们进行排序!
const SortableContainer = sortableContainer(({children}) => { return <ul>{children}</ul>;
onSortEnd 移动完毕后执行的函数
const onSortEnd = ({oldIndex, newIndex}) => { var arry1 = arrayMoveImmutable(radioList,oldIndex,newIndex) setRadioList(arry1); };
useDragHandle 移动的控件(焦点)---如果不需要可以不写
const DragHandle = sortableHandle(() => <UnorderedListOutline style = {{position:'absolute',right:'30px',top:'10px',display:isEdit == true ? '':'none'}}/>);
const SortableItem = sortableElement(({item,num}) => ( <li> <Radio key = {item.id} value = {item.value} style = {{width:'100%',position:'relative'}} > <Input style = {{border:'none',width:'96%'}} placeholder = {`选项${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。
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。
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
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