UNIAPP实战项目笔记67 加入购物车的前端和后端交互

﹏ヽ暗。殇╰゛Y 2024-03-22 15:15 44阅读 0赞

## UNIAPP实战项目笔记67 加入购物车的前端和后端交互 ##

### 思路 ###

> 前端商品详情页adCart加入购物车时直接发送数据到后端  
> 后端创建接口直接接受前端发过来的数据，更新数据库中该用户的购物车数据

### 案例截图 ###

![在这里插入图片描述][ddf3573eea3c4e8cab52c97046d5bca8.png]

### 代码 ###

#### 后端代码 index.js ####

#### 前端代码 shopcart.js ####

<template>
            <view class="shop-cart">
                <template v-if=" list.length > 0 ">
                        
                    
                    <uniNavBar
                        title="购物车"
                        :rightText=" isNavBar ? '完成' : '编辑'"
                        fixed="true"
                        statusBar="true"
                        @clickRight=" isNavBar = !isNavBar"
                    ></uniNavBar>
                    
                    
                    <view class="shop-item" v-for="(item,index) in list" :key="index">
                        <label for="" class="radio" @tap="selectedItem(index)">
                            <radio value="" color="#FF3333" :checked="item.checked" /> <text></text>
                        </label>
                        <image class="shop-img" :src="item.imgUrl" mode=""></image>
                        <view class="shop-text">
                            <view class="shop-name">
                                {
        {
        item.name}}
                            </view>
                            <view class="shop-color f-color">
                                {
        {
        item.color}}
                            </view>
                            <view class="shop-price">
                                <view class="">
                                    ￥{
        {
        item.pprice}}
                                </view>
                                <template v-if="!isNavBar">
                                    <view>x {
        {
        item.num}}</view>
                                </template>
                                <template v-else>
                                    <uniNumberBox
                                        :value="item.num"
                                        :min=1
                                        @change="changeNumber($event,index,item)"
                                    ></uniNumberBox>
                                </template>
                            </view>
                        </view>
                    </view>
                    
                    <view class="shop-foot">
                        <label for="" class="radio foot-radio" @tap='checkedAllFn'>
                            <radio value="" color="#FF3333" :checked="checkedAll"></radio><text>全选</text>
                        </label>
                        <template v-if="!isNavBar">
                            <view class="foot-total">
                                <view class="foot-count">
                                    合计：
                                    <text class="f-active-color">
                                        ￥{
        {
        totalCount.pprice}}
                                    </text>
                                </view>
                                <view class="foot-num" @tap="goConfirmOrder">
                                    结算({
        {
        totalCount.num}})
                                </view>
                            </view>
                        </template>
                        <template v-else>
                            <view class="foot-total">
                                <view class="foot-num" style="background-color: black;">
                                    移入收藏夹
                                </view>
                                <view class="foot-num" @tap="delGoodsFn">
                                    删除
                                </view>
                            </view>
                        </template>
                    </view>
                    
                </template>
                <template v-else>
                    <uniNavBar 
                        title="购物车"
                        fixed="true"
                        statusBar="true"
                    ></uniNavBar>
                    <view class="shop-else-list">
                        <text>囧~ 购物车还是空的~</text>
                    </view>
                </template>
                <Tabbar currentPage='shopcart'></Tabbar>
            </view>
        </template>
    
        <script>
            import $http from '@/common/api/request.js'
            import uniNavBar from '@/components/uni/uni-nav-bar/uni-nav-bar.vue'
            import uniNumberBox from '@/components/uni/uni-number-box/uni-number-box.vue'
            import Tabbar from '@/components/common/Tabbar.vue';//引入
            
            // 状态机引入
            import {
        mapState,mapActions,mapGetters,mapMutations} from 'vuex'
            export default {
        
                data() {
        
                    return {
        
                        isNavBar:false,
                    }
                },
                computed:{
        
                    // 状态机数据处理
                    ...mapState({
        
                        list:state=>state.cart.list
                    }),
                    ...mapGetters(['checkedAll','totalCount'])
                },
                components:{
        
                    uniNavBar,uniNumberBox,Tabbar
                },
                onShow() {
        
                  this.getData();  
                },
                methods: {
        
                    ...mapActions(['checkedAllFn','delGoodsFn']),
                    ...mapMutations(['selectedItem','initGetData']),
                    getData(){
        
                        $http.request({
        
                            url:'/selectCart',
                            method:"POST",
                            header:{
        
                                token:true
                            }
                        }).then((res)=>{
        
                            this.initGetData(res)
                        }).catch(()=>{
        
                            uni.showToast({
        
                            title:'请求失败',
                            icon:'none'
                            })
                        })
                    },
                    changeNumber(value,index,item){
        
                        if ( value == item.num ) return;
                        $http.request({
        
                            url:'/updateCart',
                            method:"POST",
                            header:{
        
                                token:true
                            },
                            data:{
        
                                goodsId:item.goods_id,
                                num:value
                            }
                        }).then((res)=>{
        
                            this.list[index].num = value;
                        }).catch(()=>{
        
                            uni.showToast({
        
                            title:'请求失败',
                            icon:'none'
                            })
                        })
                    },
                    // 进入确认订单
                    goConfirmOrder(){
        
                        uni.navigateTo({
        
                            url:'/pages/confirm-order/confirm-order'
                        })
                    }
                }
            }
        </script>
    
        <style lang="scss">
    
        .shop-list{
        
            padding-bottom: 100rpx;
        }
        .shop-else-list{
        
            position: absolute;
            left: 0;
            top: 0;
            right: 0;
            bottom: 0;
            background-color: #f7f7f7;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .shop-item{
        
            display: flex;
            padding: 20rpx;
            align-items: center;
            background-color: #f7f7f7;
            margin-bottom: 10rpx;
        }
        .shop-img{
        
            width: 200rpx;
            height: 200rpx;
        }
        .shop-text{
        
            flex: 1;
            padding-left: 20rpx;
        }
        .shop-color{
        
            font-size: 24rpx;
        }
        .shop-price{
        
            display: flex;
            justify-content: space-between;
        }
    
        .shop-foot{
        
            border-top: 2rpx solid #f7f7f7;
            background-color: #FFFFFF;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 100rpx;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 120rpx;
        }
        .foot-radio{
        
            padding-left: 20rpx;
        }
        .foot-total{
        
            display: flex;
        }
        .foot-count{
        
            line-height: 100rpx;
            padding: 0 20rpx;
            font-size: 32rpx;
        }
        .foot-num{
        
            background-color: #49bdfb;
            color: #FFFFFF;
            padding: 0 60rpx;
            line-height: 100rpx;
        }
        </style>

#### details.vue ####

<template>
            <view class="details">
                
                <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000">
                    <swiper-item>
                        <view class="swiper-item">
                            <image class="swiper-img" :src="goodsContent.imgUrl" mode=""></image>
                        </view>
                    </swiper-item>
                </swiper>
                
                <view class="details-goods">
                    <view class="goods-pprice">¥{
        {
        goodsContent.pprice}} </view>
                    <view class="goods-oprice">¥{
        {
        goodsContent.oprice}} </view>
                    <view class="goods-name">{
        {
        goodsContent.name}} </view>
                </view>
                
                <view class="">
                    <view class=""><image class="details-img" src="../../static/img/b3.jpg" mode=""></image></view>
                    <view class=""><image class="details-img" src="../../static/img/b3.jpg" mode=""></image></view>
                    <view class=""><image class="details-img" src="../../static/img/b3.jpg" mode=""></image></view>
                    <view class=""><image class="details-img" src="../../static/img/b3.jpg" mode=""></image></view>
                    <view class=""><image class="details-img" src="../../static/img/b3.jpg" mode=""></image></view>
                    <view class=""><image class="details-img" src="../../static/img/b3.jpg" mode=""></image></view>
                </view>
                
                
                <Card cardTitle="看了又看"></Card>
                <CommodityList :dataList="dataList"></CommodityList>
                
                
                <view class="details-foot">
                    <view class="iconfont icon-xiaoxi"></view>
                    <view class="iconfont icon-31gouwuche" @tap="goShopCart"></view>
                    <view class="add-shopcart" @tap="showPop">加入购物车</view>
                    <view class="purchase" @tap="showPop">立刻购买</view>
                </view>
                
                
                <view class="pop" v-show="isShow" @touchmove.stop.prevent="">
                    
                    <view class="pop-mask" @tap="hidePop"> </view>
                    
                    <view class="pop-box" :animation="animationData">
                        <view class="">
                            <image class="pop-img" :src="goodsContent.imgUrl" mode=""></image>
                        </view>
                        <view class="pop-num">
                            <view class="">购买数量</view>
                            <UniNumberBox
                                :min=1 
                                :value="num"
                                @change="changeNumber"
                            ></UniNumberBox>
                        </view>
                        <view class="pop-sub" @tap="addCart">确定</view>
                    </view>
                </view>
            </view>
        </template>
    
        <script>
            import $http from '@/common/api/request.js'
            import Card from '@/components/common/Card.vue';
            import CommodityList from '@/components/common/CommodityList.vue';
            import UniNumberBox from '@/components/uni/uni-number-box/uni-number-box.vue';
            import {
        mapMutations} from 'vuex'
            export default {
        
                data() {
        
                    return {
        
                        isShow:false,
                        goodsContent:{
        },
                        animationData:{
        },
                        num:1,
                        swiperList:[
                            {
        imgUrl:"../../static/img/b3.jpg"},
                            {
        imgUrl:"../../static/img/b3.jpg"},
                            {
        imgUrl:"../../static/img/b3.jpg"}
                        ],
                        dataList:[{
        
                              id:1,
                              imgUrl:"../../static/logo.png",
                              name:"迪奥绒毛大衣,今年必抢,错过瞬时不爽了,爆款疯狂销售",
                              pprice:"299",
                              oprice:"659",
                              discount:"5.2"
                          },
                          {
        
                              id:2,
                              imgUrl:"../../static/logo.png",
                              name:"迪奥绒毛大衣,今年必抢,错过瞬时不爽了,爆款疯狂销售",
                              pprice:"299",
                              oprice:"659",
                              discount:"5.2"
                          },{
        
                              id:3,
                              imgUrl:"../../static/logo.png",
                              name:"迪奥绒毛大衣,今年必抢,错过瞬时不爽了,爆款疯狂销售",
                              pprice:"299",
                              oprice:"659",
                              discount:"5.2"
                          }]
                    };
                },
                components:{
        
                    Card,
                    CommodityList,
                    UniNumberBox
                },
                onLoad(e) {
        
                    // console.log(e.id);
                    // 设置默认id=1
                    if(!e.id)
                        e.id = 1;
                    this.getData(e.id);
                },
                // 修改返回默认行为
                onBackPress(){
        
                    if (this.isShow) {
        
                        this.hidePop();
                        return true;  
                    }
                    
                },
                // 点击分享
                onNavigationBarButtonTap(e) {
        
                    if(e.type==='share'){
        
                        uni.share({
        
                            provider:"weixin",
                            type:0,
                            scene:"WXSceneSession",
                            title:this.goodsContent.name,
                            href:"http://127.0.0.1:8080/#/pages/details/details?id="+this.goodsContent.id,
                            imageUrl:this.goodsContent.imageUrl,
                            success:function(res){
        
                                uni.showTabBar({
        
                                    title:"分享成功"
                                })
                            },
                            fail: (err) => {
        
                                console.log("fail:"+ JSON.stringify(err));
                            }
                        })
                    }
                },
                methods:{
        
                    ...mapMutations(['addShopCart']),
                    // 改变商品数量
                    changeNumber(value){
        
                        // this.num[index] = value;
                        console.log(value);
                        this.num = value;
                    },
                    // 请求商品
                    getData(id){
        
                        $http.request({
        
                            url:"/goods/id",
                            data:{
        
                                id:id
                            }
                        }).then((res)=>{
        
                            this.goodsContent = res[0];
                        }).catch(()=>{
        
                            uni.showToast({
        
                                title:'请求失败',
                                icon:'none'
                            })
                        })
                    },
                    showPop(){
        
                        // 初始化一个动画
                        var animation = uni.createAnimation({
        
                            duration:200 // 动画时间
                        });
                        // 定义动画内容
                        animation.translateY(600).step();
                        // 导出动画数据传递给data层
                        this.animationData = animation.export();
                        setTimeout(()=>{
        
                            this.isShow = true;
                            animation.translateY(0).step();
                            this.animationData = animation.export();
                        },200)
                    },
                    hidePop(){
        
                        var animation = uni.createAnimation({
        
                            duration:200
                        });
                        animation.translateY(600).step();
                        this.animationData = animation.export();
                        this.isShow = true;
                        setTimeout(()=>{
        
                            animation.translateY(0).step();
                            this.animationData = animation.export();
                            this.isShow = false;
                        },200)
                    },
                    // 跳转到购物车页面
                    goShopCart(){
        
                        uni.navigateTo({
        
                            url:'../shopcart/shopcart'
                        })
                    },
                    // 加入购物车
                    addCart(){
        
                        let goods = this.goodsContent;
                        console.log(goods);
                        
                        $http.request({
        
                            url:"/addCart",
                            method:"POST",
                            header:{
        
                                token:true //需要验证token
                            },
                            data:{
        
                                goods_id:goods.id,
                                num:this.num
                            }
                        }).then((res)=>{
        
                            console.log(res);
                            // this.goodsContent = res[0];
                            // 隐藏弹出框
                            this.hidePop();
                            // 提示信息
                            uni.showToast({
        
                                title:"成功加入购物车",
                                icon:"none"
                            })
                        }).catch(()=>{
        
                            uni.showToast({
        
                                title:'请求失败',
                                icon:'none'
                            })
                        })
                        /* 
                        let goods = this.goodsContent;
                        this.goodsContent['checked'] = false;
                        this.goodsContent['num'] = this.num;
                        // 加入购物车
                        this.addShopCart(goods);
                        // 隐藏弹出框
                        this.hidePop();
                        // 提示信息
                        uni.showToast({
                            title:"成功加入购物车",
                            icon:"none"
                        }) 
                        */
                        
                    },
                }
            }
        </script>
    
        <style lang="scss">
        swiper{
        
            width: 100%;
            height: 700rpx;
        }
        .swiper-img{
        
            width: 100%;
            height: 700rpx;
        }
        .details{
        
            padding-bottom: 90rpx;
        }
        .details-goods{
        
            text-align: center;
            font-weight: bold;
            font-size: 36rpx;
            padding: 10rpx 0;
        }
        .details-img{
        
            width: 100%;
        }
        .details-foot{
        
            position: fixed;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 90rpx;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: #FFFFFF;
        }
        .details-foot .iconfont{
        
            width: 60rpx;
            height: 60rpx;
            border-radius: 100%;
            background-color: #000000;
            color: #FFFFFF;
            text-align: center;
            margin: 0 10rpx;
            line-height: 60rpx;
        }
        .add-shopcart{
        
            margin: 0 40rpx;
            padding: 6rpx 30rpx;
            background-color: #000000;
            color: #FFFFFF;
            border-radius: 40rpx;
            
        }
        .purchase{
        
            margin: 0 40rpx;
            padding: 6rpx 30rpx;
            background-color: #49BDFB;
            color: #FFFFFF;
            border-radius: 40rpx;
        }
        .pop{
        
            position: fixed;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            z-index: 9999;
        }
        .pop-mask{
        
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.3);
        }
        .pop-box{
        
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            background-color: #FFFFFF;
        }
        .pop-img{
        
            width: 260rpx;
            height: 260rpx;
            top:-130rpx;
            border-radius:20rpx 20rpx 0 0;
            margin: 30rpx;
        }
        .pop-sub{
        
            line-height: 80rpx;
            background-color: #49BDFB;
            color: #FFFFFF;
            text-align: center;
        }
        .pop-num{
        
            padding: 20rpx;
            display: flex;
            justify-content: space-between;
        }
    
        </style>

#### 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
         *  `Tabbar.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

[ddf3573eea3c4e8cab52c97046d5bca8.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/1c938dcfb47c4c27870e459ee9e6163d.png