UNIAPP实战项目笔记54 登录时用state存储用户信息并持久化用户登录和退出登录功能

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### UNIAPP实战项目笔记54 登录时用state存储用户信息并持久化用户登录和退出登录功能 ###

> 登录信息各个页面同步使用的是state  
> 登录信息的持久化使用的是本地存储  
> 打开APP自动初始化本地存储数据到state中

#### 实际案例图片 ####

*  登录页面数据渲染

![789c3430ff324d7b8e3f7b4015539163.png][]

#### 代码 login.vue页面 ####

> 登录成功后显示的页面

<template>
        <view class="login">
            <swiper vertical="true" style="height: 100vh;">
                <swiper-item>
                    <scroll-view>
                        <view class="login-tel">
                            <view class="tel-main">
                                <view class="close" @tap="goBack">
                                    <image class="close-img" src="../../static/img/close-bold.png" mode=""></image>
                                </view>
                                <view class="logo">
                                    <image class="logo-img" src="../../static/logo.png" mode=""></image>
                                </view>
                                <view class="tel" @tap="goLoginTel">手机号注册</view>
                                <LoginOther></LoginOther>
                                <view class="login-go">
                                    <view class="">已有账号,去登录</view>
                                    <image src="../../static/img/arrow-down.png" mode=""></image>
                                </view>
                            </view>
                        </view>
                    </scroll-view>
                </swiper-item>
                <swiper-item>
                    <scroll-view>
                        <view class="login-tel">
                            <view class="tel-main">
                                <view class="close close-center">
                                    <view class="" @tap="goBack">
                                        <image class="close-img" src="../../static/img/close-bold.png" mode=""></image>
                                    </view>
                                    <view class="login-go">
                                        <image class="close-img" src="../../static/img/up.png" mode=""></image>
                                        <view class="">没账号,去注册</view>
                                    </view>
                                    <view class=""></view>
                                </view>
                                <view class="login-form">
                                    <view class="login-user">
                                        <text class='user-text'>账号</text>
                                        <input type="text" v-model="userName" value="" placeholder="请输入手机号/昵称"/>
                                    </view>
                                    <view class="login-user">
                                        <text class='user-text'>密码</text>
                                        <input type="safe-password" v-model="userPwd" value="" placeholder="6-16位字符"/>
                                    </view>
                                </view>
                                <view class="login-quick">
                                    <view class="">忘记密码</view>
                                    <view class="">免密登录</view>
                                </view>
                                <view class="tel" @tap="submit">登录</view>
                                <view class="reminder">温馨提示,您可以选择免密登录,更加方便</view>
                                <LoginOther></LoginOther>
                            </view>
                        </view>
                    </scroll-view>
                </swiper-item>
            </swiper>
            
            
            
        </view>
    </template>
    
    <script>
        import $http from '@/common/api/request.js'
        import LoginOther from '@/components/login/login-other.vue'
        import {
        mapMutations} from 'vuex'
        export default {
        
            data() {
        
                return {
        
                    userName:"",
                    userPwd:"",
                    rules:{
        
                        userName:{
        
                            rule:/\S/,
                            msg:"账号不能为空 "
                        },
                        userPwd:{
        
                            rule:/^[0-9a-zA-Z]{6,16}$/,
                            msg:"密码应该为6-16位字符"
                        }
                    }
                };
            },
            components:{
        
                LoginOther
            },
            methods:{
        
                ...mapMutations(['login']),
                 goBack(){
        
                     uni.navigateBack();
                 },
                 submit(){
        
                     if( !this.validate('userName') ) return ;
                     if( !this.validate('userPwd') ) return ;
                     
                     uni.showLoading({
        
                         title:"登录中..."
                     });
                     // setTimeout(()=>{
        
                     //     uni.hideLoading();
                     //     uni.navigateBack();
                     // },2000)
                     
                     $http.request({
        
                         url:'/login',
                         method:"POST",
                         data:{
        
                             userName: this.userName,
                             userPwd : this.userPwd
                         }
                     }).then((res)=>{
        
                         // 保存用户信息
                         this.login(res.data);
                         console.log(res.data);
                         
                         uni.showToast({
        
                             title:res.msg,
                             icon:"none"
                         })
                         // console.log(res);
                         uni.hideLoading();
                         if(res.success){
        
                             uni.navigateBack();
                         }
                     }).catch(()=>{
        
                         uni.showToast({
        
                             title:'请求失败',
                             icon:'none'
                         })
                     })
                 },
                 // 判断验证是否符合要求
                 validate(key){
        
                     let bool = true;
                     if( !this.rules[key].rule.test(this[key]) ){
        
                         uni.showToast({
        
                             title:this.rules[key].msg,
                             icon:'none'
                         });
                         bool = false;
                         return false;
                     }
                     return bool;
                 },
                 // 进入手机号注册页面
                 goLoginTel(){
        
                     uni.navigateTo({
        
                         url:"/pages/login-tel/login-tel"
                     })
                 }
            }
        }
    </script>
    
    <style lang="scss">
    .login-tel{
        
        width: 100vw;
        height: 100vh;
    }
    .tel-main{
        
        padding: 0 20rpx;
    }
    .close{
        
        padding: 120rpx 0;
    }
    .close-img{
        
        width: 60rpx;
        height: 60rpx;
    }
    .logo{
        
        padding: 0 100rpx;
        padding-bottom: 100rpx;
        display: flex;
        justify-content: center;
        
    }
    .logo-img{
        
        width: 200rpx;
        height: 200rpx;
    }
    .tel{
        
        width: 100%;
        height: 80rpx;
        line-height: 80rpx;
        text-align: center;
        color: #fff;
        background-color: #40bde8;
        border-radius: 40rpx;
    }
    
    
    .login-go{
        
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .login-go image{
        
        width: 60rpx;
        height: 60rpx;
    }
    
    // 第二屏
    .close-center{
        
        display: flex;
    }
    .close-center >view{
        
        flex: 1;
    }
    .login-form{
        
        padding-top: 100rpx;
    }
    .login-user{
        
        font-size: 40rpx;
        padding: 10rpx 0 ;
        display: flex;
        align-items: center;
        border-bottom: 2rpx solid #f7f7f7;
    }
    .user-text{
        
        padding-right: 10rpx;
    }
    .login-quick{
        
        display: flex;
        padding: 20rpx 0;
        justify-content: space-between;
    }
    .reminder{
        
        color: #ccc;
        font-size: 32rpx;
        padding: 20rpx 0;
        text-align: center;
    }
    </style>

#### 代码 my.vue页面 ####

> 设置功能里面有退出按钮,通过调用state中的outLogin方法来实现退出功能

<template>
        <view class="my">
            
            <view class="my-header">
                <view class="header-main">
                    <view class="header-config" @tap="goConfig">
                        <image class="config-img" src="../../static/tabbar/list.png" mode=""></image>
                    </view>
                    <view class="header-logo">
                        <image class="logo-img" :src="loginStatus ? userInfo.imgUrl :'../../static/tabbar/mySelected.png'" mode=""></image>
                        <view class="logo-name" @tap="goLogin">{
        {
        loginStatus ? userInfo.nickName : '用户昵称'}}</view>
                    </view>
                </view>
            </view>
            
            <view class="order">
                <view class="order-title" @tap="goOrder">
                    <view class="">我的订单</view>
                    <view class="">全部订单 > </view>
                </view>
                <view class="order-list">
                    <view class="order-item">
                        <image class="order-img" src="../../static/logo.png" mode=""></image>
                        <view class="">待付款</view>
                    </view>
                    <view class="order-item">
                        <image class="order-img" src="../../static/logo.png" mode=""></image>
                        <view class="">待付款</view>
                    </view>
                    <view class="order-item">
                        <image class="order-img" src="../../static/logo.png" mode=""></image>
                        <view class="">待付款</view>
                    </view>
                    <view class="order-item">
                        <image class="order-img" src="../../static/logo.png" mode=""></image>
                        <view class="">待付款</view>
                    </view>
                    <view class="order-item">
                        <image class="order-img" src="../../static/logo.png" mode=""></image>
                        <view class="" @tap="qianzi">待付款1</view>
                    </view>
                </view>
                
                <view class="my-content">
                    <view class="my-content-item" v-for="(item,index) in 6">
                        <view class="">
                            我的收藏
                        </view>
                        <view class="">
                            >
                        </view>
                    </view>
                </view>
            </view>
        </view>
    </template>
    
    <script>
        import {
        mapState} from 'vuex'
        export default {
        
            data() {
        
                return {
        
                    
                }
            },
            computed:{
        
                ...mapState({
        
                    loginStatus:state=>state.user.loginStatus,
                    userInfo:state=>state.user.userInfo
                })
            },
            methods: {
        
                goConfig(){
        
                    uni.navigateTo({
        
                        url:'../my-config/my-config'
                    })
                },
                goOrder(){
        
                    uni.navigateTo({
        
                        url:'../my-order/my-order'
                    })
                },
                qianzi(){
        
                    uni.navigateTo({
        
                        url:'../qianzi/qianzi'
                    })
                },
                goLogin(){
        
                    uni.navigateTo({
        
                        url:'/pages/login/login'
                    })
                }
            }
        }
    </script>
    
    <style lang="scss">
    .my-header{
        
        background-color: #eee;
        width: 100%;
        height: 400rpx;
    }
    .header-main{
        
        position:relative;
        top: 120rpx;
    }
    .header-config{
        
        position: absolute;
        left: 20rpx;
    }
    .header-logo{
        
        position: absolute;
        left:50%;
        margin-left:-60rpx;
        width: 120rpx;
    }
    .config-img{
        
        width: 40rpx;
        height: 40rpx;
    }
    .logo-img{
        
        width: 120rpx;
        height: 120rpx;
        border:2rpx solid #ccc;
        border-radius: 50%;
        background-color: #FFFFFF;
    }
    .logo-name{
        
        color: #FFFFFF;
        font-size: 30rpx;
        font-weight: bold;
        text-align: center;
    }
    .order-title{
        
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20rpx;
    }
    .order-list{
        
        padding:20rpx;
        display: flex;
    }
    .order-item{
        
        flex:1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .order-img{
        
        width: 80rpx;
        height: 80rpx;
    }
    .my-content{
        
        margin:20rpx 0;
        padding: 0 20rpx;
    }
    .my-content-item{
        
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20rpx 0;
        border-bottom: 2px solid #ccc;
    }
    </style>

#### 代码 my-config.vue页面 ####

> 退出功能具体实现

<template>
        <view class="my-config">
            
            <view class="config-item" @tap="goPathList">
                <view class="">地址管理</view>
                <view class=""> > </view>
            </view>        
            
            <view class="config-item" v-for="(item,index) in 5">
                <view class="">地址管理</view>
                <view class=""> > </view>
            </view>
            
            <view class="my-exit" @tap="outLogin">
                退出
            </view>
            
        </view>
    </template>
    
    <script>
        import {
        mapMutations} from 'vuex'
        export default {
        
            data() {
        
                return {
        
                    
                };
            },
            methods:{
        
                ...mapMutations(['loginOut']),
                goPathList(){
        
                    uni.navigateTo({
        
                        url:'../my-path-list/my-path-list'
                    })
                },
                outLogin(){
        
                    uni.showToast({
        
                        title:"退出成功!",
                        icon:'none'
                    });
                    this.loginOut();
                    uni.switchTab({
        
                        url:"/pages/index/index"
                    })
                }
            }
        }
    </script>
    
    <style lang="scss">
    .config-item{
        
        display: flex;
        justify-content: space-between;
        padding: 20rpx;
        border-bottom: 2rpx solid #ccc;
    }
    .my-exit{
        
        background-color: #49bdfb;
        width: 100%;
        line-height: 80rpx;
        color: #FFFFFF;
        text-align: center;
    }
    </style>

#### 代码 /store/modules/user.js ####

> user用到的state

export default{
        
        state:{
        
            // 登录状态
            loginStatus:false,
            // token
            token:null,
            // 用户信息 昵称头像等
            userInfo:{
        }
        },
        getters:{
        
    
        },
        mutations:{
        
            // 一旦进入app,就需要执行这个方法把用户信息读出来,放到App.vue的onLaunch中触发
            initUser(state){
        
                let userInfo = uni.getStorageSync('userInfo');
                if( userInfo ){
        
                    userInfo = JSON.parse(userInfo);
                    state.userInfo = userInfo;
                    state.loginStatus = true;
                    state.token = userInfo.token;
                }
            },
            
            // 登录后保存用户信息
            login(state,userInfo){
        
                state.userInfo = userInfo;
                state.loginStatus = true;
                state.token = userInfo.token;
                
                // 持久化存储 -- 把对象转换成字符串
                uni.setStorageSync('userInfo',JSON.stringify(userInfo));
            },
            
            // 退出登录
            loginOut(state){
        
                state.userInfo = {
        };
                state.loginStatus = false;
                state.token = null;
                // 删除本地持久化存储
                uni.removeStorageSync('userInfo');
            }
        },
        actions:{
        
            
        }
    }

#### 代码 /store/index.js ####

> 将 user.js引入到 state

import Vue from 'vue'
    import Vuex from 'vuex'
    
    Vue.use(Vuex);
    
    // 购物车
    import cart from './modules/cart.js'
    // 地址管理
    import path from './modules/path.js'
    // 用户
    import user from './modules/user.js'
    
    export default new Vuex.Store({
        
        modules:{
        
            cart,
            path,
            user
        }
    })

#### 代码 /App.js ####

> 进入APP持久化数据获取

#### 目录结构 ####

##### 前端目录结构 #####

*  manifest.json 配置文件： appid、logo…
 *  pages.json 配置文件： 导航、 tabbar、 路由
 *  
 *  main.js vue初始化入口文件
 *  App.vue 全局配置：样式、全局监视
 *  static 静态资源：图片、字体图标
 *  page 页面
    
     *  index
        
         *  index.vue
     *  list
        
         *  list.vue
     *  my
        
         *  my.vue
     *  my-config
        
         *  my-config.vue
     *  my-config
        
         *  my-config.vue
     *  my-add-path
        
         *  my-add-path.vue
     *  my-path-list
        
         *  my-path-list.vue
     *  search
        
         *  search.vue
     *  search-list
        
         *  search-list.vue
     *  shopcart
        
         *  shopcart.vue
     *  details
        
         *  details.vue
     *  my-order
        
         *  my-order.vue
     *  confirm-order
        
         *  confirm-order.vue
     *  payment
        
         *  payment.vue
     *  payment-success
        
         *  payment-success.vue
     *  login
        
         *  login.vue
     *  login-tel
        
         *  `login-tel.vue`
     *  login-code
        
         *  `login-code.vue`
 *  components 组件
    
     *  index
        
         *  Banner.vue
         *  Hot.vue
         *  Icons.vue
         *  indexSwiper.vue
         *  Recommend.vue
         *  Shop.vue
     *  common
        
         *  Card.vue
         *  Commondity.vue
         *  CommondityList.vue
         *  Line.vue
         *  ShopList.vue
     *  order
        
         *  order-list.vue
     *  uni
        
         *  uni-number-box
            
             *  uni-number-box.vue
         *  uni-icons
            
             *  uni-icons.vue
         *  uni-nav-bar
            
             *  uni-nav-bar.vue
         *  mpvue-citypicker
            
             *  mpvueCityPicker.vue
 *  common 公共文件：全局css文件 || 全局js文件
    
     *  api
        
         *  request.js
     *  common.css
     *  uni.css
 *  store vuex状态机文件
    
     *  modules
        
         *  cart.js
         *  path.js
         *  user.js
     *  index.js

[789c3430ff324d7b8e3f7b4015539163.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/6a6429eb32854b08a8466e5f1b201cbe.png