建设网站观澜/优化设计六年级下册语文答案

1.安装插件

这里的redux-persist--进行数据的持久化缓存，确保页面刷新数据不会丢失

yarn add react-redux@^9.2.0 redux-persist@^6.0.0 @reduxjs/toolkit@^2.5.1

2.创建仓库文件夹

在项目的src文件夹下创建名为store的文件夹，里面的具体文件如下

features文件夹对应文件如下

features文件夹中存放对应的需要进行状态管理的数据

couterSlice.ts

这里是一个简单的计数器的加减,赋值,清零的一个测试仓库

createSlice中包含的字段

initialState存储的字段

reducers对应useDispatch的分发行为

name仓库的唯一标识

import { createSlice, PayloadAction } from "@reduxjs/toolkit";
import type { RootState } from "../store";// 为 slice state 定义一个类型
interface CounterState {value: number;
}// 使用该类型定义初始 state
const initialState: CounterState = {value: 0,
};export const counterSlice = createSlice({name: "counter",// `createSlice` 将从 `initialState` 参数推断 state 类型initialState,reducers: {increment: (state) => {state.value += 1;},decrement: (state) => {state.value -= 1;},// 使用 PayloadAction 类型声明 `action.payload` 的内容，用于登录，注册等传入具体的参数incrementByAmount: (state, action: PayloadAction<number>) => {state.value += action.payload;},//清零emptyCount: (state, action: PayloadAction<number>) => {state.value = action.payload;},},
});export const { increment, decrement, incrementByAmount, emptyCount } =counterSlice.actions;
// 选择器等其他代码可以使用导入的 `RootState` 类型
export const selectCount = (state: RootState) => state.counter.value;export default counterSlice.reducer;

user.ts

存储用户信息以及模拟登录token的reducer

import { createSlice, PayloadAction } from "@reduxjs/toolkit";
import type { RootState } from "../store";
import {getToken,setToken,getLocal,setLocal,removeToken,removeLocal,
} from "@/utils/token";
import { Local } from "@/enums/Local";interface UserState {token: string | undefined | null;username: string | undefined | null;
}const initialState: UserState = {token: getToken() || undefined,username: getLocal(Local.USER_INFO)?.username || undefined,
};export const userSlice = createSlice({name: "user",initialState,reducers: {setInfo: (state, action: PayloadAction<UserState>) => {state.token = action.payload.token;state.username = action.payload.username;setToken(action.payload.token);setLocal(Local.USER_INFO, { username: action.payload.username });},remove: (state) => {state.token = undefined;state.username = undefined;removeToken();removeLocal(Local.USER_INFO);},},
});export const { setInfo, remove } = userSlice.actions;
// 选择器等其他代码可以使用导入的 `RootState` 类型
export const selectUser = (state: RootState) => state.user;export default userSlice.reducer;

user.ts文件夹下使用了一些方法，补充如下

utils文件夹下的token.ts文件以及enums文件夹下的Loacl文件如下

import { Local } from "@/enums/Local";
/*** @Description: 生成一个随机token* @Date: 2024-11-20 17:14:19*/
export function generateToken(length: number) {const characters ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";let token = "";for (let i = 0; i < length; i++) {const randomIndex = Math.floor(Math.random() * characters.length);token += characters[randomIndex];}return token;
}/*** @Description: 将token存储到localStorage中* @Date: 2024-11-20 17:15:12*/
export function setToken(token: string) {const expireTime = new Date().getTime() + 24 * 60 * 60 * 1000; // 设置当前时间加上24小时为过期时间const data = {token: token,expire: expireTime,};localStorage.setItem("token", JSON.stringify(data));
}/*** @Description: 从localStorage中获取token* @Date: 2024-11-20 17:15:42*/
export function getToken() {const dataString = localStorage.getItem("token");if (dataString) {const data = JSON.parse(dataString);const currentTime = new Date().getTime();if (currentTime > data.expire) {// 如果过期，则删除tokenremoveToken();return null; // token已过期，返回null}return data.token; // 返回有效的token}return null; // 如果没有token，返回null
}/*** @Description: 将localStorage中的token删除* @Date: 2024-11-20 17:16:02*/
export function removeToken() {localStorage.removeItem("token"); // 删除token
}/*** @Description: 设置本地存储* @Date: 2024-12-05 14:16:45*/
export function setLocal(key: Local, value: any) {localStorage.setItem(key, JSON.stringify(value));
}/*** @Description: 获取本地存储* @Date: 2024-12-05 14:19:02*/
export function getLocal(key: Local) {const dataString = localStorage.getItem(key);if (dataString) {console.log(JSON.parse(dataString));return JSON.parse(dataString);} else {return null;}
}/*** @Description: 清除本地存储* @Date: 2024-12-05 14:19:48*/
export function removeLocal(key: Local) {localStorage.removeItem(key);
}

export enum Local {USER_INFO = "USER_INFO",REDIRECT_PATH = "redirectPath",
}

hook.d.ts

定义这个声明文件，允许将它们导入到任何需要使用的 hooks 的组件文件中，并避免潜在的循环导入的依赖问题。

import { TypedUseSelectorHook, useDispatch, useSelector } from 'react-redux'
import type { RootState, AppDispatch } from './store'// 在整个应用程序中使用，而不是简单的 `useDispatch` 和 `useSelector`
export const useAppDispatch: () => AppDispatch = useDispatch
export const useAppSelector: TypedUseSelectorHook<RootState> = useSelector

store.ts仓库入口文件如下

使用persistConfig进行持久化配置,root为存储到本地的名称，没有特别的要求,whiteList白名单，存放的是需要持久化存储的仓库blackList则相反

import { configureStore } from "@reduxjs/toolkit";
import { persistStore, persistReducer } from "redux-persist";
import storage from "redux-persist/lib/storage"; // 默认使用 localStorage
import counterReducer from "./features/couterSlice";
import userReducer from "./features/user";
// ...// 持久化配置
const persistConfig = {key: "root", // 存储的键名storage, // 存储方式whitelist: ["user"], // 需要持久化的reducerblacklist: ["counter"], // 不需要持久化的reducer
};const persistedReducer = persistReducer(persistConfig, userReducer);const store = configureStore({reducer: {counter: counterReducer,user: persistedReducer,},middleware: (getDefaultMiddleware) =>getDefaultMiddleware({serializableCheck: {// 忽略 redux-persist 的持久化 actionignoredActions: ["persist/PERSIST", "persist/REHYDRATE"],},}),
});const persistor = persistStore(store);// 从 store 本身推断出 `RootState` 和 `AppDispatch` 类型
export type RootState = ReturnType<typeof store.getState>;
// 推断出类型: {posts: PostsState, comments: CommentsState, users: UsersState}
export type AppDispatch = typeof store.dispatch;export { store, persistor };

在入口文件main.tsx引入store.ts并配置

采取provider上下文的方式实现数据的传输使用PersistGate组件对白名单中的reducer进行持久化存储

import { createRoot } from "react-dom/client";
import "./index.css";
import { HashRouter } from "react-router-dom";
import App from "./App.tsx";
import { store, persistor } from "./store/store.ts";
import { Provider } from "react-redux";
import { PersistGate } from "redux-persist/integration/react";createRoot(document.getElementById("root")!).render(<HashRouter><Provider store={store}><PersistGate loading={null} persistor={persistor}><App /></PersistGate></Provider></HashRouter>
);

3.使用仓库

通过useSelector从redux的state中读取对应的值

useSelector((state: any) => state?.'仓库名称'.value)

useDispatch ，用于在组件中分发操作（action），从而更新 Redux store 中的数据。

从对应的reducer中引入对应的分发操作,因为reduxjs/toolkit的特性，再进行传参赋值的时候，不必要再像老版本一样{...旧值,新值}

传参赋值参考emptyCount这一函数等

使用conuterSlice仓库

import { useSelector, useDispatch } from "react-redux";
import {decrement,increment,incrementByAmount,emptyCount,
} from "@/store/features/couterSlice";
import { setInfo, remove } from "@/store/features/user";
import { Button } from "antd";function DefaultPage() {const count = useSelector((state: any) => state?.counter.value);const userInfo = useSelector((state: any) => state?.user);const dispatch = useDispatch();return (<><div><div><ButtonclassName="mr-4"onClick={() => dispatch(emptyCount(0))}type="primary">清零</Button><Button type="primary" onClick={() => dispatch(increment())}>increment增加</Button><div className="mt-2 mb-2">{count}</div><Buttontype="primary"className="mr-4"onClick={() => dispatch(decrement())}>Decrement减少</Button><Buttontype="primary"onClick={() => dispatch(incrementByAmount(count > 0 ? count : 1))}>增加指定值</Button></div></div></>);
}export default DefaultPage;

补充：结合user.ts这一reducer实现鉴权登录。

这里需要封装一个鉴权组件判断是否登录,给需要鉴权登录的组件嵌套上即可

import React from "react";
import { Local } from "@/enums/Local";
import { setLocal } from "@/utils/token";
import { Navigate, useLocation, useNavigate } from "react-router-dom";
import { useSelector } from "react-redux"; // 假设你使用 Redux// 这是一个路由守卫组件，用于检查用户是否登录
const RequireAuth = ({ children }: { children: React.ReactNode }) => {const location = useLocation();const userInfo = useSelector((state: any) => state?.user);// 如果用户未登录，则保存当前路径并重定向到登录页面if (!userInfo?.token) {setLocal(Local.REDIRECT_PATH, location.pathname);return <Navigate to="/login" />;}return children;
};export default RequireAuth;

登录页面

这里在用户名密码都正确后采用useDispatch调用reducer中的serInfo方法将用户名和token存储到storage 和仓库中去，登录成功后重定向到第一次访问的默认页

import { Button, Checkbox, Form, Input, message } from "antd";
import { Local } from "@/enums/Local";
import { generateToken, getLocal, removeLocal } from "@/utils/token";
import { setInfo } from "@/store/features/user";
import { useDispatch } from "react-redux";
import { useNavigate } from "react-router-dom";
import type { FormProps } from "antd";
import "./index.less";function Login() {const [messageApi, contextHolder] = message.useMessage();const myCleft = "c_left";const myCright = "c_right";const userList = [{userName: "admin",password: "123456",},{userName: "student",password: "123456",},
];type FieldType = {username?: string;password?: string;};const dispatch = useDispatch();const navigate = useNavigate();const onFinish: FormProps<FieldType>["onFinish"] = (values) => {console.log("Success:", values);checkInfo(values);};const onFinishFailed: FormProps<FieldType>["onFinishFailed"] = (errorInfo) => {console.log("Failed:", errorInfo);};//判断用户名密码是否正确const checkInfo = (value: FieldType) => {//用户名const userIndex = userList.findIndex((item) => item.userName == value.username);if (userIndex == -1) {messageApi.open({type: "error",content: "用户名错误",duration: 1,});return;} else {const passwordIndex = userList.findIndex((item) => item.password == value.password);if (passwordIndex == -1) {messageApi.open({type: "error",content: "密码错误",duration: 1,});} else {messageApi.open({type: "loading",content: "登录中",duration: 1.5,}).then(() => {messageApi.open({type: "success",content: "登录成功",duration: 1,}).then(() => {handleLogin(value);});});}}};//登录const handleLogin = (value: FieldType) => {const token = generateToken(16);dispatch(setInfo({ token, username: value.username }));// 登录成功后const redirectPath = getLocal(Local.REDIRECT_PATH) || "/";removeLocal(Local.REDIRECT_PATH); // 清除路径navigate(redirectPath, { replace: true }); // 重定向};return (<>{contextHolder}<div className="w-full h-full " style={{ background: "lightgray" }}><div className="w-full h-full flex justify-center items-center"><div className="l_container"><div className="c_left"><div className={`${myCleft}-title`}>欢迎您的到来！</div><div className={`${myCleft}-title`}>WELCOME !</div><div className={`${myCleft}-desc`}>请在右侧输入账号密码，登录您的账号</div></div><div className="c_right"><div className={`${myCright}-title`}>请输入信息！</div><div className={`${myCright}-form`}><Formname="basic"labelCol={{ span: 8 }}wrapperCol={{ span: 16 }}style={{ maxWidth: 600 }}initialValues={{ remember: true }}onFinish={onFinish}onFinishFailed={onFinishFailed}autoComplete="off"><Form.Item<FieldType>label="用户名："name="username"rules={[{required: true,message: "请输入用户名称!",},]}><Input /></Form.Item><Form.Item<FieldType>label="密码："name="password"rules={[{required: true,message: "请输入密码!",},]}><Input.Password /></Form.Item><Form.Item label={null}><ButtonclassName="sub_btn"type="primary"size="large"htmlType="submit">登录</Button></Form.Item></Form></div></div></div></div></div></>);
}export default Login;

参考git地址如下:

myReactRouterOnlyRead: 仅供参考