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本文小编为大家详细介绍“react怎么实现侧边栏联动头部导航栏效果”，内容详细，步骤清晰，细节处理妥当，希望这篇“react怎么实现侧边栏联动头部导航栏效果”文章能帮助大家解决疑惑，下面跟着小编的思路慢慢深入，一起来学习新知识吧。
项目中使用react+antd design+redux+react-reouter-dom
编写路由表=》循环遍历路由表=》渲染侧边栏=》单击侧边栏获取相应的标签数据=》存入redux=》遍历循环redux数据渲染头部导航栏
const RouterTree = [
{
key: 'num_one',
title: {
icon: '',
text: 'text'
},
children: [
{
key: '1',
text: 'options1',
path: '/option1',
component: '',
isOutSide: true,
}
]
},
{
key: 'num_two',
title: {
icon: '',
text: 'text'
},
children: [
{
key: '2',
text: 'text',
path: '/option1',
component: '',
isOutSide: false
}
]
},
{
key: 'num_three',
title: {
icon: '',
text: 'text'
},
children: [
{
key: '3',
text: 'text',
path: '/option1',
component: '',
isOutSide: false
}
]
},
]
export default RouterTree引入路由表，循环遍历渲染侧边栏
import React, { Component } from 'react'
import { Menu } from 'antd';
import { NavLink as Link, withRouter } from 'react-router-dom'
import RouterTree from '@/modules/route.js'
render() {
const { activityKey } = this.state || {}
return (
<div>
<Menu
onClick={this.handleClick}
defaultSelectedKeys={['1']}
defaultOpenKeys={['sub1']}
selectedKeys={activityKey}
mode="inline"
inlineCollapsed={isToggle}
>
{RouterTree.map((item, index) => {
return (
<SubMenu
key={item.key}
title={item.title.text}
index={index}
>
{item.children && item.children.map((menuItem, menuIndex) => {
return (<Menu.Item
key={menuItem.key}
index={menuIndex}
>
{menuItem.isOutSide ? <a href='http://www.baidu.com' rel="noopener noreferrer">baidu</a> : <Link to={menuItem.path}>{menuItem.text}</Link>}
</Menu.Item>)
})}
</SubMenu>)
})}
</Menu>
</div>
)由于单独使用redux不便，项目中引用react-redux，redux-thunk。
这里将侧边栏拆分为两个文件，一个是容器组件，一个为UI组件（以上的为UI组件）
容器组件为导出的组件，在容器组件中引入UI组件slide
import { connect } from 'react-redux'
import { business } from '@/tools/index.js'
import Slide from './slide'
const { processedArr } = business
const mapStoreToProps = (state) => {
const { dynamicJump,activityKey} = state || {}
let responseRoute = processedArr(dynamicJump)
return {
dynamicJump: [...responseRoute],
activityKey:activityKey
}
}
const mapDispatchToProps = (dispatch) => {
return {
updateRouter(item) {
dispatch((dispatch) => {
dispatch({
type: 'UPDATED_ROUTING', item: { ...item }
})
})
},
activityKeys(key){
dispatch((dispatch)=>{
dispatch({
type:'ACTIVITY_KEY',key:key
})
})
}
}
}
export default connect(mapStoreToProps, mapDispatchToProps)(Slide)在src下新建一个store文件
import { createStore, applyMiddleware } from 'redux'
import thunk from 'redux-thunk';
import { routerMiddleware } from 'react-router-redux'
let createHistory = require('history').createBrowserHistory
let history = createHistory()
let routerWare = routerMiddleware(history)
const dynamicJump = {
dynamicJump: '这里设置默认值'（一般存放在session中）,
activityKey: '这里设置默认值',
}
const reducers = function (state = dynamicJump, action) {
switch (action.type) {
case 'UPDATED_ROUTING':
state.dynamicJump =action.item
break;
case 'ACTIVITY_KEY':
if (action.key !== undefined) {
state.activityKey = action.key
}
break;
default:
break;
}
return { ...state }
}
const store = createStore(reducers, applyMiddleware(thunk, routerWare))
// 订阅事件
store.subscribe(() => {
let state = store.getState();
sessionStorage.setItem('dynamicJump',JSON.stringify(state.dynamicJump))
sessionStorage.setItem('activityKey',JSON.stringify(state.activityKey))
})
export default store在根目录下将其注入进去（注意文件的引入位置）
import {Provider} from 'react-redux'
import store from './store/index.js'
ReactDOM.render(
<Provider store={store}><App /></Provider>,
document.getElementById('root')
);import { connect } from 'react-redux'
import { push } from 'react-router-redux'
import { business } from '@/tools/index.js'
import Header from './head.jsx'
const { processedArr } = business
const mapStoreToProps = (state) => {
const { dynamicJump, activityKey } = state
let newRouteArr = processedArr(dynamicJump)
return {
dynamicJump: [...newRouteArr],
activityKey: activityKey
}
}
const mapDispatchToProps = (dispatch) => {
return {
removeKey(itemKey) {
dispatch((dispatch, getStore) => {
const { dynamicJump } = getStore() || {}
let removeArr = processedArr(dynamicJump)
const indexes = removeArr.findIndex((item) => item.key === itemKey)
// 点击头部导航条的删除（即删除保存在redux的数组元素即可）
if (removeArr.length > 1) {
removeArr.splice(indexes, 1)
}
// 删除之后跳转到删除元素的前一个元素的路由地址
let path = removeArr[indexes - 1] ? removeArr[indexes - 1].path : '/option1'
let keys = removeArr[indexes - 1] ? removeArr[indexes - 1].key : 0
if(keys===0){
keys=removeArr[0].key
}
dispatch({
type: 'UPDATED_ROUTING', item: { ...removeArr },
})
dispatch({
type: 'ACTIVITY_KEY', key: keys
})
// 这里进行跳转
dispatch(push(path))
})
},
changeActiveKey(key) {
dispatch((dispatch) => {
dispatch({
type: 'ACTIVITY_KEY', key: key
})
})
}
}
}
export default connect(mapStoreToProps, mapDispatchToProps)(Header)这里存在着：如果删除头部组件的其中一个导航，那么需要跳转到该导航（删除的）的前一个路由地址，而这个操作在UI组件中是不方便的，这里我采取的方法是引入“history”模块（详细代码请移步到store.js),然后在容器组件中使用dispatch(push(path))跳转，也可以使用更为简单的方法，直接在容器组件中引入react-router的withRouter，包裹在最外层即：export default withRouter（connect(mapStoreToProps, mapDispatchToProps)(Header)）
render(){
const { dynamicJump } = this.props || {}
const { activeKey } = this.state || {}
<Tabs
hideAdd
onChange={this.onChange}
activeKey={activeKey}
type="line"
onEdit={this.onEdit}
className='tabs'
>
{ dynamicJump.map((item) => (
<TabPane tab={<Link to={item.path}>{item.text}</Link>} key={item.key} />
))}
</Tabs>
}对于key值，可以使用react新增的钩子函数：getDerivedStateFromProps进行判断是否更行
static getDerivedStateFromProps(nextProps, preState) {
const { activityKey, dynamicJump } = nextProps || {}
const { activeKey } = preState || {}
if (activityKey !== activeKey) {
return {
activeKey: activityKey
}
}
return { allRoute: dynamicJump }
}
remove = targetKey => {
this.removeKey(targetKey)
}
removeKey(key) {
this.props.removeKey(key)
}读到这里，这篇“react怎么实现侧边栏联动头部导航栏效果”文章已经介绍完毕，想要掌握这篇文章的知识点还需要大家自己动手实践使用过才能领会，如果想了解更多相关内容的文章，欢迎关注亿速云行业资讯频道。
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