07.智慧商城——商品详情页、加入购物车、拦截器封装token

01. 商品详情 - 静态布局

在这里插入图片描述

静态结构和样式

<template>
  <div class="prodetail">
    <van-nav-bar fixed title="商品详情页" left-arrow @click-left="$router.go(-1)" />

    <van-swipe :autoplay="3000" @change="onChange">
      <van-swipe-item v-for="(image, index) in images" :key="index">
        <img :src="image" />
      </van-swipe-item>

      <template #indicator>
        <div class="custom-indicator">{{ current + 1 }} / {{ images.length }}</div>
      </template>
    </van-swipe>

    <!-- 商品说明 -->
    <div class="info">
      <div class="title">
        <div class="price">
          <span class="now">￥0.01</span>
          <span class="oldprice">￥6699.00</span>
        </div>
        <div class="sellcount">已售1001件</div>
      </div>
      <div class="msg text-ellipsis-2">
        三星手机 SAMSUNG Galaxy S23 8GB+256GB 超视觉夜拍系统 超清夜景 悠雾紫 5G手机 游戏拍照旗舰机s23
      </div>

      <div class="service">
        <div class="left-words">
          <span><van-icon name="passed" />七天无理由退货</span>
          <span><van-icon name="passed" />48小时发货</span>
        </div>
        <div class="right-icon">
          <van-icon name="arrow" />
        </div>
      </div>
    </div>

    <!-- 商品评价 -->
    <div class="comment">
      <div class="comment-title">
        <div class="left">商品评价 (5条)</div>
        <div class="right">查看更多 <van-icon name="arrow" /> </div>
      </div>
      <div class="comment-list">
        <div class="comment-item" v-for="item in 3" :key="item">
          <div class="top">
            <img src="http://cba.itlike.com/public/uploads/10001/20230321/a0db9adb2e666a65bc8dd133fbed7834.png" alt="">
            <div class="name">神雕大侠</div>
            <van-rate :size="16" :value="5" color="#ffd21e" void-icon="star" void-color="#eee"/>
          </div>
          <div class="content">
            质量很不错 挺喜欢的
          </div>
          <div class="time">
            2023-03-21 15:01:35
          </div>
        </div>
      </div>
    </div>

    <!-- 商品描述 -->
    <div class="desc">
      <img src="https://uimgproxy.suning.cn/uimg1/sop/commodity/kHgx21fZMWwqirkMhawkAw.jpg" alt="">
      <img src="https://uimgproxy.suning.cn/uimg1/sop/commodity/0rRMmncfF0kGjuK5cvLolg.jpg" alt="">
      <img src="https://uimgproxy.suning.cn/uimg1/sop/commodity/2P04A4Jn0HKxbKYSHc17kw.jpg" alt="">
      <img src="https://uimgproxy.suning.cn/uimg1/sop/commodity/MT4k-mPd0veQXWPPO5yTIw.jpg" alt="">
    </div>

    <!-- 底部 -->
    <div class="footer">
      <div class="icon-home">
        <van-icon name="wap-home-o" />
        <span>首页</span>
      </div>
      <div class="icon-cart">
        <van-icon name="shopping-cart-o" />
        <span>购物车</span>
      </div>
      <div class="btn-add">加入购物车</div>
      <div class="btn-buy">立刻购买</div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'ProDetail',
  data () {
    return {
      images: [
        'https://img01.yzcdn.cn/vant/apple-1.jpg',
        'https://img01.yzcdn.cn/vant/apple-2.jpg'
      ],
      current: 0
    }
  },
  methods: {
    onChange (index) {
      this.current = index
    }
  }
}
</script>

<style lang="less" scoped>
.prodetail {
  padding-top: 46px;
  ::v-deep .van-icon-arrow-left {
    color: #333;
  }
  img {
    display: block;
    width: 100%;
  }
  .custom-indicator {
    position: absolute;
    right: 10px;
    bottom: 10px;
    padding: 5px 10px;
    font-size: 12px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 15px;
  }
  .desc {
    width: 100%;
    overflow: scroll;
    ::v-deep img {
      display: block;
      width: 100%!important;
    }
  }
  .info {
    padding: 10px;
  }
  .title {
    display: flex;
    justify-content: space-between;
    .now {
      color: #fa2209;
      font-size: 20px;
    }
    .oldprice {
      color: #959595;
      font-size: 16px;
      text-decoration: line-through;
      margin-left: 5px;
    }
    .sellcount {
      color: #959595;
      font-size: 16px;
      position: relative;
      top: 4px;
    }
  }
  .msg {
    font-size: 16px;
    line-height: 24px;
    margin-top: 5px;
  }
  .service {
    display: flex;
    justify-content: space-between;
    line-height: 40px;
    margin-top: 10px;
    font-size: 16px;
    background-color: #fafafa;
    .left-words {
      span {
        margin-right: 10px;
      }
      .van-icon {
        margin-right: 4px;
        color: #fa2209;
      }
    }
  }

  .comment {
    padding: 10px;
  }
  .comment-title {
    display: flex;
    justify-content: space-between;
    .right {
      color: #959595;
    }
  }

  .comment-item {
    font-size: 16px;
    line-height: 30px;
    .top {
      height: 30px;
      display: flex;
      align-items: center;
      margin-top: 20px;
      img {
        width: 20px;
        height: 20px;
      }
      .name {
        margin: 0 10px;
      }
    }
    .time {
      color: #999;
    }
  }

  .footer {
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 55px;
    background-color: #fff;
    border-top: 1px solid #ccc;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    .icon-home, .icon-cart {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      .van-icon {
        font-size: 24px;
      }
    }
    .btn-add,
    .btn-buy {
      height: 36px;
      line-height: 36px;
      width: 120px;
      border-radius: 18px;
      background-color: #ffa900;
      text-align: center;
      color: #fff;
      font-size: 14px;
    }
    .btn-buy {
      background-color: #fe5630;
    }
  }
}
    
.tips {
  padding: 10px;
}
</style>

Lazyload 是 Vue 指令，使用前需要对指令进行注册。

import { Lazyload } from 'vant'
Vue.use(Lazyload)

02. 商品详情 - 动态渲染介绍

动态路由参数，获取商品 id

computed: {
  goodsId () {
    return this.$route.params.id
  }
},

封装 api 接口 api/product.js

// 获取商品详情数据
export const getProDetail = (goodsId) => {
  return request.get('/goods/detail', {
    params: {
      goodsId
    }
  })
}

一进入页面发送请求，获取商品详情数据

data () {
  return {
    images: [
      'https://img01.yzcdn.cn/vant/apple-1.jpg',
      'https://img01.yzcdn.cn/vant/apple-2.jpg'
    ],
    current: 0,
    detail: {},
  }
},

async created () {
  this.getDetail()
},

methods: {
  ...
  async getDetail () {
    const { data: { detail } } = await getProDetail(this.goodsId)
    this.detail = detail
    this.images = detail.goods_images
  }
}

动态渲染

<div class="prodetail" v-if="detail.goods_name">

<van-swipe :autoplay="3000" @change="onChange">
  <van-swipe-item v-for="(image, index) in images" :key="index">
    <img v-lazy="image.external_url" />
  </van-swipe-item>

  <template #indicator>
    <div class="custom-indicator">{{ current + 1 }} / {{ images.length }}</div>
  </template>
</van-swipe>

<!-- 商品说明 -->
<div class="info">
  <div class="title">
    <div class="price">
      <span class="now">￥{{ detail.goods_price_min }}</span>
      <span class="oldprice">￥{{ detail.goods_price_max }}</span>
    </div>
    <div class="sellcount">已售{{ detail.goods_sales }}件</div>
  </div>
  <div class="msg text-ellipsis-2">
    {{ detail.goods_name }}
  </div>

  <div class="service">
    <div class="left-words">
      <span><van-icon name="passed" />七天无理由退货</span>
      <span><van-icon name="passed" />48小时发货</span>
    </div>
    <div class="right-icon">
      <van-icon name="arrow" />
    </div>
  </div>
</div>

<!-- 商品描述 -->
<div class="tips">商品描述</div>
<div class="desc" v-html="detail.content"></div>

03. 商品详情 - 动态渲染评价

封装接口 api/product.js

// 获取商品评价
export const getProComments = (goodsId, limit) => {
  return request.get('/comment/listRows', {
    params: {
      goodsId,
      limit
    }
  })
}

页面调用获取数据

import defaultImg from '@/assets/default-avatar.png'

data () {
  return {
    ...
    total: 0,
    commentList: [],
    defaultImg
},

async created () {
  ...
  this.getComments()
},
    
async getComments () {
  const { data: { list, total } } = await getProComments(this.goodsId, 3)
  this.commentList = list
  this.total = total
},

动态渲染评价

<!-- 商品评价 -->
<div class="comment" v-if="total > 0">
  <div class="comment-title">
    <div class="left">商品评价 ({{ total }}条)</div>
    <div class="right">查看更多 <van-icon name="arrow" /> </div>
  </div>
  <div class="comment-list">
    <div class="comment-item" v-for="item in commentList" :key="item.comment_id">
      <div class="top">
        <img :src="item.user.avatar_url || defaultImg" alt="">
        <div class="name">{{ item.user.nick_name }}</div>
        <van-rate :size="16" :value="item.score / 2" color="#ffd21e" void-icon="star" void-color="#eee"/>
      </div>
      <div class="content">
        {{ item.content }}
      </div>
      <div class="time">
        {{ item.create_time }}
      </div>
    </div> 
  </div>
</div>

04. 加入购物车 - 唤起弹窗

在这里插入图片描述

按需导入 van-action-sheet

import { ActionSheet } from 'vant'
Vue.use(ActionSheet)

准备 van-action-sheet 基本结构

<van-action-sheet v-model="showPannel" :title="mode === 'cart' ? '加入购物车' : '立刻购买'">
	弹窗
</van-action-sheet>
    
data () {
  return {
    ...
    mode: 'cart'
    showPannel: false
  }
},

注册点击事件，点击时唤起弹窗

<div class="btn-add" @click="addFn">加入购物车</div>
<div class="btn-buy" @click="buyFn">立刻购买</div>

addFn () {
  this.mode = 'cart'
  this.showPannel = true
},
buyFn () {
  this.mode = 'buyNow'
  this.showPannel = true
}

完善结构

<van-action-sheet v-model="showPannel" :title="mode === 'cart' ? '加入购物车' : '立刻购买'">
  <div class="product">
    <div class="product-title">
      <div class="left">
        <img src="http://cba.itlike.com/public/uploads/10001/20230321/8f505c6c437fc3d4b4310b57b1567544.jpg" alt="">
      </div>
      <div class="right">
        <div class="price">
          <span>¥</span>
          <span class="nowprice">9.99</span>
        </div>
        <div class="count">
          <span>库存</span>
          <span>55</span>
        </div>
      </div>
    </div>
    <div class="num-box">
      <span>数量</span>
      数字框占位
    </div>
    <div class="showbtn" v-if="true">
      <div class="btn" v-if="true">加入购物车</div>
      <div class="btn now" v-else>立刻购买</div>
    </div>
    <div class="btn-none" v-else>该商品已抢完</div>
  </div>
</van-action-sheet>

.product {
  .product-title {
    display: flex;
    .left {
      img {
        width: 90px;
        height: 90px;
      }
      margin: 10px;
    }
    .right {
      flex: 1;
      padding: 10px;
      .price {
        font-size: 14px;
        color: #fe560a;
        .nowprice {
          font-size: 24px;
          margin: 0 5px;
        }
      }
    }
  }

  .num-box {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    align-items: center;
  }

  .btn, .btn-none {
    height: 40px;
    line-height: 40px;
    margin: 20px;
    border-radius: 20px;
    text-align: center;
    color: rgb(255, 255, 255);
    background-color: rgb(255, 148, 2);
  }
  .btn.now {
    background-color: #fe5630;
  }
  .btn-none {
    background-color: #cccccc;
  }
}

动态渲染

<van-action-sheet v-model="showPannel" :title="mode === 'cart' ? '加入购物车' : '立刻购买'">
  <div class="product">
    <div class="product-title">
      <div class="left">
        <img :src="detail.goods_image" alt="">
      </div>
      <div class="right">
        <div class="price">
          <span>¥</span>
          <span class="nowprice">{{ detail.goods_price_min }}</span>
        </div>
        <div class="count">
          <span>库存</span>
          <span>{{ detail.stock_total }}</span>
        </div>
      </div>
    </div>
    <div class="num-box">
      <span>数量</span>
      数字框组件
    </div>
    <div class="showbtn" v-if="detail.stock_total > 0">
      <div class="btn" v-if="mode === 'cart'">加入购物车</div>
      <div class="btn now" v-if="mode === 'buyNow'">立刻购买</div>
    </div>
    <div class="btn-none" v-else>该商品已抢完</div>
  </div>
</van-action-sheet>

05. 加入购物车 - 封装数字框组件

在这里插入图片描述

封装组件 components/CountBox.vue

<template>
  <div class="count-box">
    <button @click="handleSub" class="minus">-</button>
    <input :value="value" @change="handleChange" class="inp" type="text">
    <button @click="handleAdd" class="add">+</button>
  </div>
</template>

    
<script>
export default {
  props: {
    value: {
      type: Number,
      default: 1
    }
  },
  methods: {
    handleSub () {
      if (this.value <= 1) {
        return
      }
      this.$emit('input', this.value - 1)
    },
    handleAdd () {
      this.$emit('input', this.value + 1)
    },
    handleChange (e) {
      // console.log(e.target.value)
      const num = +e.target.value // 转数字处理 (1) 数字 (2) NaN

      // 输入了不合法的文本 或 输入了负值，回退成原来的 value 值
      if (isNaN(num) || num < 1) {
        e.target.value = this.value
        return
      }

      this.$emit('input', num)
    }
  }
}
</script>
    

<style lang="less" scoped>
.count-box {
  width: 110px;
  display: flex;
  .add, .minus {
    width: 30px;
    height: 30px;
    outline: none;
    border: none;
    background-color: #efefef;
  }
  .inp {
    width: 40px;
    height: 30px;
    outline: none;
    border: none;
    margin: 0 5px;
    background-color: #efefef;
    text-align: center;
  }
}
</style>

使用组件

import CountBox from '@/components/CountBox.vue'

export default {
  name: 'ProDetail',
  components: {
    CountBox
  },
  data () {
    return {
      addCount: 1
      ...
    }
  },
}

<div class="num-box">
  <span>数量</span>
  <CountBox v-model="addCount"></CountBox>
</div>

06. 加入购物车 - 判断 token 登录提示

说明：加入购物车，是一个登录后的用户才能进行的操作，所以需要进行鉴权判断，判断用户 token 是否存在

若存在：继续加入购物车操作
不存在：提示用户未登录，引导到登录页

1. 按需注册 dialog 组件

import { Dialog } from 'vant'
Vue.use(Dialog)

按钮注册点击事件

<div class="btn" v-if="mode === 'cart'" @click="addCart">加入购物车</div>

添加 token 鉴权判断，跳转携带回跳地址

async addCart () {
  // 判断用户是否有登录,因为这里要根据用户的选择判断是否要跳转到登录页面，我们之前在路由前置守卫中设置过拦截路径为：['/pay', '/myorder']，
  //这里是用户访问这两个页面直接拦截前往登录页面，并没有询问用户的意见，所以不能直接在前置守卫中进行拦截。
  if (!this.$store.getters.token) {
    this.$dialog.confirm({
      title: '温馨提示',
      message: '此时需要先登录才能继续操作哦',
      confirmButtonText: '去登录',
      cancelButtonText: '再逛逛'
    })
      .then(() => {
        //注意这里使用replace而不是使用push，push会新增浏览记录，而replace则是替换浏览记录，A页面replaceB时，A的浏览纪律会被B替换
        this.$router.replace({
          path: '/login',
          query: {
            backUrl: this.$route.fullPath
          }
        })
      })
      .catch(() => {})
    return
  }
  console.log('进行加入购物车操作')
}

登录后，若有回跳地址，则回跳页面

// 判断有无回跳地址
const url = this.$route.query.backUrl || '/'
this.$router.replace(url)

07. 加入购物车 - 封装接口进行请求

在这里插入图片描述

封装接口 api/cart.js

// 加入购物车，goodSkulId为商品的规格，例如颜色，大小
export const addCart = (goodsId, goodsNum, goodsSkuId) => {
  return request.post('/cart/add', {
    goodsId,
    goodsNum,
    goodsSkuId
  })
}

页面中调用请求

data () {
  return {
      cartTotal: 0
  }  
},

async addCart () {
  ...
  const { data } = await addCart(this.goodsId, this.addCount, this.detail.skuList[0].goods_sku_id)
  this.cartTotal = data.cartTotal
  this.$toast('加入购物车成功')
  this.showPannel = false
},

在这里插入图片描述

请求拦截器中，统一携带 token

// 自定义配置 - 请求/响应 拦截器
// 添加请求拦截器
instance.interceptors.request.use(function (config) {
  ...
  const token = store.getters.token
  if (token) {
    config.headers['Access-Token'] = token
    config.headers.platform = 'H5'
  }
  return config
}, function (error) {
  // 对请求错误做些什么
  return Promise.reject(error)
})

准备小图标

<div class="icon-cart">
  <span v-if="cartTotal > 0" class="num">{{ cartTotal }}</span>
  <van-icon name="shopping-cart-o" />
  <span>购物车</span>
</div>

定制样式

.footer .icon-cart {
  position: relative;
  padding: 0 6px;
  .num {
    z-index: 999;
    position: absolute;
    top: -2px;
    right: 0;
    min-width: 16px;
    padding: 0 4px;
    color: #fff;
    text-align: center;
    background-color: #ee0a24;
    border-radius: 50%;
  }
}