React低代码项目：Redux 状态管理

吐司问卷：Redux 状态管理

Date: February 18, 2025 5:37 PM (GMT+8)

Redux 管理用户信息

命名规范：

以 Info 结尾表示获取Reudx信息，比如 useGetUserInfo.ts

以 data 结尾表示获取服务端信息，比如 useLoadQuestionData

采用 Redux 管理用户信息

Redux store 设计：

src/store/index.ts

import { configureStore } from '@reduxjs/toolkit'
import userReducer, { UserStateType } from './userReducer'export type StateType = {user: UserStateType
}export default configureStore({reducer: {user: userReducer,},
})

userReducer 开发：

src/store/userReducer.ts

import { createSlice, PayloadAction } from '@reduxjs/toolkit'export type UserStateType = {username: stringnickname: string
}const INIT_STATE: UserStateType = {username: '',nickname: '',
}export const userSlice = createSlice({name: 'user',initialState: INIT_STATE,reducers: {loginReducer: (state: UserStateType,action: PayloadAction<UserStateType>) => {return action.payload},logoutReducer: () => {return INIT_STATE},},
})export const { loginReducer, logoutReducer } = userSlice.actions
export default userSlice.reducer

src/index.ts

 import React from 'react'import ReactDOM from 'react-dom/client'
+import { Provider } from 'react-redux'
+import store from './store'import App from './App'const root = ReactDOM.createRoot(document.getElementById('root') as HTMLElement)root.render(<React.StrictMode>
-    <App />
+    <Provider store={store}>
+      <App />
+    </Provider></React.StrictMode>)

点击Logo跳转优化

**需求：**原本点击 Logo 会跳转到 home 页。现在需要根据是否有用户信息，进行区分判断。

如果有用户信息，点击 Logo 则跳转到管理页面。没有则到 home 页面。

src/component/Logo.tsx

-import React, { FC } from 'react'
+import React, { FC, useState, useEffect } from 'react'import { Space, Typography } from 'antd'import { BlockOutlined } from '@ant-design/icons'import { Link } from 'react-router-dom'
+import useGetUserInfo from '../hooks/useGetUserInfo'
+import { HOME_PATHNAME, MANAGE_INDEX_PATHNAME } from '../router/index'import styles from './Logo.module.scss'const { Title } = Typographyconst Logo: FC = () => {
+  const { username } = useGetUserInfo()
+  const [pathname, setPathname] = useState<string>(HOME_PATHNAME)
+  useEffect(() => {
+    if (username) {
+      setPathname(MANAGE_INDEX_PATHNAME)
+    }
+  }, [username])return (<div className={styles.container}>
-      <Link to="/">
+      <Link to={pathname}><Space><Title><BlockOutlined />

自定义 Hook 统一加载用户信息

思路：

开发获取 Redux 中用户信息
开发获取服务端用户信息，并与 Redux 联动
设计页面加载状态（根据用户信息获取与否进行判断）
- 有用户信息，则停止加载。没有则进行加载。

useGetUserInfo.tsx

import { useSelector } from 'react-redux'
import { StateType } from '../store'
import { UserStateType } from '../store/userReducer'function useGetUserInfo() {const { username, nickname } = useSelector<StateType>((state: StateType) => state.user) as UserStateTypereturn { username, nickname }
}export default useGetUserInfo

useLoadUserData.ts

import { useEffect, useState } from 'react'
import { useRequest } from 'ahooks'
import { getUserInfoService } from '../services/user'
import { useDispatch } from 'react-redux'
import useGetUserInfo from './useGetUserInfo'
import { loginReducer } from '../store/userReducer'function useLoadUserData() {const [waitingUserData, setWaitingUserData] = useState<boolean>(false)const dispatch = useDispatch()// 加载用户信息const { run } = useRequest(getUserInfoService, {manual: true,onSuccess: res => {const { username, nickname } = res// 存储到 Redux 中dispatch(loginReducer({ username, nickname }))},onFinally() {setWaitingUserData(false)},})// Redux 中数据const { username } = useGetUserInfo()useEffect(() => {if (username) {setWaitingUserData(false)}run()}, [username])return { waitingUserData }
}export default useLoadUserData

用户退出功能优化

**思路：**用户退出不仅需要清空 Redux 信息，还要清空本地 token 信息

src/component/userInfo.tsx

 import { LOGIN_PATHNAME } from '../router'import { Button, message } from 'antd'import { UserOutlined } from '@ant-design/icons'
-import { getUserInfoService } from '../services/user'import { removeToken } from '../utils/user-token'
-import { useRequest } from 'ahooks'
+import useGetUserInfo from '../hooks/useGetUserInfo'
+import { useDispatch } from 'react-redux'
+import { logoutReducer } from '../store/userReducer'const UserInfo: FC = () => {const nav = useNavigate()
-  const { data } = useRequest(getUserInfoService)
-  const { username, nickname } = data || {}
+  const { username, nickname } = useGetUserInfo()
+  const dispatch = useDispatch()const logout = () => {
-    removeToken()
+    dispatch(logoutReducer()) // 清空 redux user 中的数据
+    removeToken() // 清空 token 的存储message.success('退出成功')nav(LOGIN_PATHNAME)}

根据用户登录状态动态跳转页面

需求：

当用户已经登陆，在问卷管理页面时，URL中输 /login，会自动返回问卷管理页面，而非再登陆

实现思路：

设计 useNavPage 钩子函数：获取用户状态与URL，根据用户状态判断是否页面跳转走向。

useNavPage.ts

import { useEffect } from 'react'
import { useNavigate, useLocation } from 'react-router-dom'
import {isLoginOrRegister,isNoNeedUserInfo,MANAGE_INDEX_PATHNAME,LOGIN_PATHNAME,
} from '../router'
import useGetUserInfo from './useGetUserInfo'function useNavPage(waitingUserData: boolean) {const { username } = useGetUserInfo()const { pathname } = useLocation()const nav = useNavigate()useEffect(() => {if (waitingUserData) returnif (username) {if (isLoginOrRegister(pathname)) {nav(MANAGE_INDEX_PATHNAME)}return}if (isNoNeedUserInfo(pathname)) {return} else {nav(LOGIN_PATHNAME)}}, [waitingUserData, username, pathname])
}export default useNavPage

src/router/index.ts


export function isLoginOrRegister(pathname: string) {return [LOGIN_PATHNAME, REGISTER_PATHNAME].includes(pathname)
}export function isNoNeedUserInfo(pathname: string) {return [HOME_PATHNAME, LOGIN_PATHNAME, REGISTER_PATHNAME].includes(pathname)
}

Bugfix

Q：请求不断发送

项目中有一处请求会不断发送，在 Chrome Network 中可以看出。

useLoadUserData.ts

useEffect(() => {if (username) {setWaitingUserData(false)}run() // 这里可能造成循环调用
}, [username])

问题原因：

当Redux中的username为空时，run()会执行获取用户信息
获取成功后通过dispatch(loginReducer)更新username
username更新触发useEffect再次执行
形成「获取数据 → 更新username → 触发请求」的循环

解决方案：

修改useLoadUserData.ts中的useEffect：

useEffect(() => {// 当已有用户信息时不再请求if (username) {setWaitingUserData(false)return}run()
}, [username]) // 保持原有依赖

Q：页面刷新自动弹回登陆界面

问题原因分析：

在useLoadUserData hook中，用户信息加载完成后才会设置waitingUserData为false
useNavPage hook中会在用户信息未加载完成时判断路由权限
页面刷新时会清空Redux状态，导致需要重新加载用户信息
用户信息加载是异步操作，在加载完成前路由守卫已执行跳转判断

解决方案：修改useLoadUserData.ts文件，在组件挂载时立即触发用户信息加载：

useLoadUserData.ts

function useLoadUserData() {const [waitingUserData, setWaitingUserData] = useState<boolean>(true) // 初始值改为 trueconst dispatch = useDispatch()// 加载用户信息const { run } = useRequest(getUserInfoService, {manual: true,onSuccess: res => {const { username, nickname } = resdispatch(loginReducer({ username, nickname }))},onFinally() {setWaitingUserData(false)},})// 添加 useEffect 立即执行数据加载useEffect(() => {run()}, [])// Redux 中数据const { username } = useGetUserInfo()useEffect(() => {if (username) {setWaitingUserData(false)}}, [username])return { waitingUserData }
}

修改说明：