reduxjs-toolkit 案例 — 登录

import {createSlice,createAsyncThunk} from '@reduxjs/toolkit'
import service from './../../service'
const initialState={
    token:sessionStorage.getItem("token")?sessionStorage.getItem("token"):"",
    user:sessionStorage.getItem("user")?JSON.parse(sessionStorage.getItem("user")):{}
}
// 三种状态 ，在extraReducers去侦听，进行不同处理  fulfilled|pending|rejected
export const userLogin = createAsyncThunk("user/userLogin",async (userInput)=>{
     // 发起axios请求
        const res = await service.userSerive.User_Login(userInput); // 相当于then传的数据 
        return res;
})
export const {reducer} = createSlice({
    name:"userSlice",
    initialState,
    reducers:{ //纯函数，不能写异步操作
    },
    extraReducers:{
        // userLogin return 的值放在action.payload属性
        // payload: 负载
       [userLogin.fulfilled](state,{payload}){
           state.token = payload.token;
           state.user = payload.data;
           //将state更新的值同步更新到sessionStorage中
           sessionStorage.setItem("token",payload.token);
           sessionStorage.setItem("user",JSON.stringify(payload.data));

           console.log("fulfilled",payload);
       },
       [userLogin.pending](state){
        console.log("pending");
       },
       [userLogin.rejected](state){
        console.log("rejected");
       }
    }
})

import {configureStore} from '@reduxjs/toolkit'

import {reducer} from './features/userSlice'

export const store = configureStore({
    reducer:{
        userReducer:reducer
    }
})

import {Provider} from 'react-redux'
import {store} from './store'
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
  <Provider store={store}>
    <App />
  </Provider>
);

import { Button, Checkbox,message, Form, Input } from 'antd';
import React from 'react';
import './Login.css'
import {useNavigate} from 'react-router-dom'
import {useDispatch} from 'react-redux'
import {userLogin} from './../store/features/userSlice';
import {unwrapResult} from '@reduxjs/toolkit'
function Login(props) {
    const navigate = useNavigate();
    const diaptch = useDispatch();
    const onFinish = (values) => {
        console.log('Success:', values);
        // 将用户名和密码发送到后台，进行验证
        // 发起请求的操作，redux 中的action中进行

      /*  Redux工具箱导出一个unwrapResult函数，该函数可用于提取已完成操作的有效负载，
          或抛出错误，或抛出rejectWithValue从已拒绝操作创建的有效负载（如果可用）。*/
        diaptch(userLogin(values)).then(unwrapResult).then((data)=>{
            if(data.returnCode===200){
              message.success("登录成功");
              navigate("/index");
            }else{
              message.warning("登录失败");
            }

        }).catch((err)=>{
          message.error("登录出错");
        }); // 通过派发到指定action 
      };

      const onFinishFailed = (errorInfo) => {
        console.log('Failed:', errorInfo);
      };

      return (
         <div className='loginContainer'>
            <h2>登录</h2>
             <Form
          name="basic"
          labelCol={{
            span: 8,
          }}
          wrapperCol={{
            span: 16,
          }}
          initialValues={{
            remember: true,
          }}
          onFinish={onFinish}
          onFinishFailed={onFinishFailed}
          autoComplete="off"
        >
          <Form.Item
            label="用户名"
            name="userName"
            rules={[
              {
                required: true,
                message: '请输入用户名!',
              },
            ]}
          >
            <Input />
          </Form.Item>

          <Form.Item
            label="密码"
            name="userPwd"
            rules={[
              {
                required: true,
                message: '请输入密码!',
              },
            ]}
          >
            <Input.Password />
          </Form.Item>

          <Form.Item
            name="remember"
            valuePropName="checked"
            wrapperCol={{
              offset: 8,
              span: 16,
            }}
          >
            <Checkbox>记住密码</Checkbox>
          </Form.Item>
 
          <Form.Item
            wrapperCol={{
              offset: 8,
              span: 16,
            }}
          >
            <Button type="primary" htmlType="submit">
              登录
            </Button>
          </Form.Item>
        </Form>
         </div>
      );
}

export default Login