在react中 使用redux

1.安装redux

 npm install @reduxjs/toolkit react-redux

2.创建切片模块化数据

在Src目录下创建store目录，创建moude目录 创建tab.js

import { createSlice } from '@reduxjs/toolkit';
const tabSlice = createSlice({name: 'tab',initialState: {Collapse: false,},reducers: {setCollapse:(state,action)=>{state.Collapse = !state.Collapse}}
})
export const {setCollapse} = tabSlice.actions
export default tabSlice.reducer

3.创建store

在store目录下创建index.js

import { configureStore } from '@reduxjs/toolkit';
import TabData from './modules/tab.js'
export default configureStore({reducer: {Tab:TabData}
})

4.全局注册redux

src/inedx.js

import {Provider} from 'react-redux'
import store from './store'root.render(<React.StrictMode><Provider store={store}><App /></Provider></React.StrictMode>
);

 5.在页面获取展示数据

import { useSelector } from 'react-redux';const showMenu = useSelector((state) => state.Tab.Collapse);
//  state.Tab.Collapse
// Tab是reducer里定义的   Collapse 是initialState 里定义的

6.修改数据

import {useDispatch} from 'react-redux'
//实例化useDispatch
const dispatch = useDispatch()dispatch(setCollapse())
//setCollapse 是之前定义修改数据的方法

完整代码

import React from 'react';
import { Layout,Button,Avatar,Dropdown } from 'antd';
import './index.css';
import { MenuFoldOutlined } from '@ant-design/icons';
import {useDispatch} from 'react-redux'
import {setCollapse} from '../../../../store/modules/tab'
const { Header } = Layout;
const url = 'https://gw.alipayobjects.com/zos/rmsportal/KDpgvguMpGfqaHPjicRK.svg';
const ComHeader = ({showMenu2}) => {const dispatch = useDispatch()const isShow = () => {dispatch(setCollapse())}const items = [{key: '1',// eslint-disable-next-line jsx-a11y/anchor-is-validlabel: (<a>个人中心</a>),},{key: '2',// eslint-disable-next-line jsx-a11y/anchor-is-validlabel: (<a onClick={()=>logout}>退出</a>),},];return (<Header className='header-container'><Button type="text" icon={<MenuFoldOutlined></MenuFoldOutlined>} style={{color: 'white',fontSize:'18px'}} onClick={()=>{isShow()}}></Button><Dropdown menu={{ items }}><Avatar src={<img src={url} alt="avatar" />} /></Dropdown></Header>)
}
export default ComHeader