React에서 3레벨 메뉴를 구현하는 방법: 1. 3레벨 상위 메뉴를 만들고 확장하는 방법은 "onOpenChange = (openKeys) => {...}"를 통해 2. "handleSelectkeys(e) ){... }" 선택한 상태를 설정합니다. 3. "oli.push(
이 튜토리얼의 운영 환경: Windows10 system, React18..0.0 버전, Dell G3 컴퓨터
상위 메뉴 표시줄(3단계 메뉴 표시줄)의 사이드바만 확장하기 위해
react + antd를 사용하여 3단계 메뉴를 구현하는 방법
페이지를 단순하게 유지하고 사용자 경험을 개선하기 위해 3단계 사이드바만 확장할 수 있는 요구 사항이 발생했습니다. 저도 오랫동안 온라인에서 검색했지만 완전히 충족되는 항목을 찾지 못했습니다.
3단계 상위 메뉴 확장 방법
onOpenChange = (openKeys) => {
const latestOpenKey = openKeys.find(key => this.state.openKeys.indexOf(key) === -1);
let openList;
if(this.state.rootSubmenuKeys.indexOf(latestOpenKey) === -1) {
if(latestOpenKey&&latestOpenKey.length===3){
openList = this.state.openKeys.filter((e)=>{
return e.length!==3;
})
this.setState({
openKeys:openList });
}else{
this.setState({
openKeys:openKeys });
}
}else{
if(latestOpenKey&&latestOpenKey.length===3){
openList = this.state.openKeys.filter((e)=>{
return e.length!==3;
})
openList.push(latestOpenKey);
this.setState({
openKeys:openList[1] ? openList : [openList[0],openList[2]]
});
}else{
this.setState({
openKeys: latestOpenKey ? [latestOpenKey] : [],
});
}
}
}</p>
<p><strong>선택 상태 설정</strong></p>
<pre class="brush:php;toolbar:false"> handleSelectkeys(e){
if(this.state.isShow){
this.setState({
selectedKey:e.key,
openKeys:e.keyPath[length] == 3 ? [e.keyPath[2],e.keyPath[1]] : [e.keyPath[0]],
isShow:true
});
}
}사이드바 컴포넌트 Menu.js 전체 코드
const data = this.props.list;
var html = [];
for(var i=0;i<data.length;i++){
if(data[i].children){
var li = []
for(var j=0;j<data[i].children.length;j++){
var liData = data[i].children[j];
if(liData.children){
var oli = [];
for(var k=0;k<liData.children.length;k++){
oli.push(
<Menu.Item key={liData.children[k].url}>
<Link to={
{
pathname:liData.children[k].url,
state:{//三级菜单下传openKeys传两个值，展开两级
parent:this.state.openKeys[0],
child:this.state.openKeys[1]
}
}
}>
<span>{liData.children[k].text}</span>
</Link>
</Menu.Item>
)
}
var oul = <SubMenu key={liData.id} title={<span>{liData.iconCls && <Icon type={liData.iconCls} />}<span>{liData.text}</span></span>}>{oli}</SubMenu>;
li.push(oul);
}else{
li.push(
<Menu.Item key={liData.url}>
<Link to={
{
pathname:liData.url,
state:{//二级菜单下openKeys传一个值，展开一级
parent:this.state.openKeys[0],
// child:this.state.openKeys[1] ? this.state.openKeys[1] : ''
}
}
} >
{liData.iconCls && <Icon type={liData.iconCls} />}
<span>{liData.text}</span>
</Link>
</Menu.Item>
);
}
}
var ul = <SubMenu key={data[i].id} title={<span>{data[i].iconCls && <Icon type={data[i].iconCls} />}<span>{data[i].text}</span></span>}>{li}</SubMenu>;
html.push(ul);
}else{
html.push(
<Menu.Item key={data[i].url}>
<Link to={
{
pathname:data[i].url,
state:{//一级菜单下传空值，不展开菜单栏
parent:''
}
}
} >
{data[i].iconCls && <Icon type={data[i].iconCls} />}
<span>{data[i].text}</span>
</Link>
</Menu.Item>
)
}
}사이드바 데이터 menu.js
import React from 'react'import { Menu,Icon } from 'antd';import {Link,withRouter} from 'react-router-dom'const { SubMenu } = Menu;
class Menus extends React.Component{
constructor(props){
super(props)
this.state={
openKeys:['1','100'],
rootSubmenuKeys:[],
selectedKeys:[this.props.history.location.pathname], //选中
isShow:false //判断是否已经展开，如已展开停止重新赋值避免重新渲染和关系菜单
}
this.handleSelectkeys = this.handleSelectkeys.bind(this)
}
UNSAFE_componentWillMount(){
if(this.props.location.state){
this.setState({
openKeys:[this.props.location.state.parent,this.props.location.state.child ? this.props.location.state.child : '']
})
}
}
componentDidMount(props,nextProps){
var data = this.props.list;
for(var i=0;i {
const latestOpenKey = openKeys.find(key => this.state.openKeys.indexOf(key) === -1);
let openList;
if(this.state.rootSubmenuKeys.indexOf(latestOpenKey) === -1) {
if(latestOpenKey&&latestOpenKey.length===3){
openList = this.state.openKeys.filter((e)=>{
return e.length!==3;
})
this.setState({
openKeys:openList });
}else{
this.setState({
openKeys:openKeys });
}
}else{
if(latestOpenKey&&latestOpenKey.length===3){
openList = this.state.openKeys.filter((e)=>{
return e.length!==3;
})
openList.push(latestOpenKey);
this.setState({
openKeys:openList[1] ? openList : [openList[0],openList[2]]
});
}else{
this.setState({
openKeys: latestOpenKey ? [latestOpenKey] : [],
});
}
}
}
render(){
const data = this.props.list;
var html = [];
for(var i=0;i<data.length;i++){
if(data[i].children){
var li = []
for(var j=0;j<data[i].children.length;j++){
var liData = data[i].children[j];
if(liData.children){
var oli = [];
for(var k=0;k<liData.children.length;k++){
oli.push(
<Menu.Item key={liData.children[k].url}>
<Link to={
{
pathname:liData.children[k].url,
state:{//三级菜单下传openKeys传两个值，展开两级
parent:this.state.openKeys[0],
child:this.state.openKeys[1]
}
}
}>
<span>{liData.children[k].text}</span>
</Link>
</Menu.Item>
)
}
var oul = <SubMenu key={liData.id} title={<span>{liData.iconCls && <Icon type={liData.iconCls} />}<span>{liData.text}</span></span>}>{oli}</SubMenu>;
li.push(oul);
}else{
li.push(
<Menu.Item key={liData.url}>
<Link to={
{
pathname:liData.url,
state:{//二级菜单下openKeys传一个值，展开一级
parent:this.state.openKeys[0],
// child:this.state.openKeys[1] ? this.state.openKeys[1] : ''
}
}
} >
{liData.iconCls && <Icon type={liData.iconCls} />}
<span>{liData.text}</span>
</Link>
</Menu.Item>
);
}
}
var ul = <SubMenu key={data[i].id} title={<span>{data[i].iconCls && <Icon type={data[i].iconCls} />}<span>{data[i].text}</span></span>}>{li}</SubMenu>;
html.push(ul);
}else{
html.push(
<Menu.Item key={data[i].url}>
<Link to={
{
pathname:data[i].url,
state:{//一级菜单下传空值，不展开菜单栏
parent:''
}
}
} >
{data[i].iconCls && <Icon type={data[i].iconCls} />}
<span>{data[i].text}</span>
</Link>
</Menu.Item>
)
}
}
return (
)
}}export default withRouter(Menus); 추천 학습: "react 비디오 튜토리얼
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