<template> <div class="goods">  <div class="menu-wrapper" ref="menuScroll">   <ul>    <!--專場-->    <li class="menu-item" :class="{'current':currentIndex===0}" @click="selectMenu(0)">     <p class="text">      <img :src="container.tag_icon" v-if="container.tag_icon" class="icon">      {{container.tag_name}}     </p>    </li>    <li     class="menu-item"     v-for="(item,index) in goods"     :class="{'current':currentIndex===index+1}"     @click="selectMenu(index+1)"    >     <p class="text">      <img :src="item.icon" v-if="item.icon" class="icon">      {{item.name}}     </p>    </li>   </ul>  </div>  <!-- 右側商品列表 -->  <div class="foods-wrapper" ref="foodScroll">   <!--專場-->   <ul>    <li class="container-list food-list-hook">     <div v-for="item in container.operation_source_list">      <img :src="item.pic_url">     </div>    </li>    <!-- 具體分類-->    <li v-for="item in goods" class="food-list food-list-hook">     <h3 class="title">{{item.name}}</h3>     <!--具體商品列表-->     <ul>      <li v-for="food in item.spus" class="food-item">       <div class="icon" :style="head_bg(food.picture)"></div>       <div class="content">        <h3 class="name">{{food.name}}</h3>        <p class="desc" v-if="food.description">{{food.description}}</p>        <div class="extra">         <span class="saled">{{food.month_saled_content}}</span>         <span class="praise">{{food.praise_content}}</span>        </div>        <img         class="product"         :src="food.product_label_picture"         v-show="food.product_label_picture"        >        <p class="price">         <span class="text">￥{{food.min_price}}</span>         <span class="unit">/{{food.unit}}</span>        </p>       </div>       <div class="cartcontrol-wrapper">        <Cartcontrol :food="food"></Cartcontrol>       </div>      </li>     </ul>    </li>   </ul>  </div>  <Shopcart :poiInfo="poiInfo" :selectFoods="selectFoods"></Shopcart> </div></template>

<script>import BScroll from "better-scroll";//滾動組件import Shopcart from "components/Shopcart/Shopcart";//購物車import Cartcontrol from "components/Cartcontrol/Cartcontrol";//控制商品數量按鈕export default { data() {  return {   container: {},   goods: [],   poiInfo: {},   listHeight: [],   menuScroll: {},   foodScroll: {},   scrollY: 0  }; }, components: {  BScroll,//引入組件  Shopcart,  Cartcontrol }, created() {  this.$axios   .get("api/goods")   .then(response => {    let json = response.data;    if (json.code === 0) {     // 重點     this.container = json.data.container_operation_source;     this.goods = json.data.food_spu_tags;     this.poiInfo = json.data.poi_info;     this.$nextTick(function() {      this.initScroll();      // 左右聯動      // 右->左      // 計算區間      this.caculateHeight();     });    }   })   .catch(function(error) {    // handle error    console.log(error);   }); }, computed: {  // 根據右側判斷左側index  currentIndex() {   for (let i = 0; i < this.listHeight.length; i++) {    let start = this.listHeight[i];    let end = this.listHeight[i + 1];    if (this.scrollY >= start && this.scrollY < end) {     return i;    }   }   return 0;  },  selectFoods() {   let foods = [];     this.goods.forEach(good => {     good.spus.forEach(food => {      if (food.count > 0) {       foods.push(food);      }     });     });   return foods;  } }, methods: {  head_bg(imgName) {   return "background-image: url(" + imgName + ");";  },  initScroll() {   this.menuScroll = new BScroll(this.$refs.menuScroll, {    click: true   });   this.foodScroll = new BScroll(this.$refs.foodScroll, {    probeType: 3,    click: true   });   this.foodScroll.on("scroll", pos => {    this.scrollY = Math.abs(Math.round(pos.y));   });  },  caculateHeight() {   let foodList = this.$refs.foodScroll.getElementsByClassName(    "food-list-hook"   );//獲取到dom元素   let height = 0;   this.listHeight.push(height);   for (let i = 0; i < foodList.length; i++) {    height += foodList[i].clientHeight;    this.listHeight.push(height);   }   // [0, 215, 1343, 2425, 3483, 4330, 5823, 7237, 8022, 8788, 9443]  },  selectMenu(index) {   let foodlist = this.$refs.foodScroll.getElementsByClassName(    "food-list-hook"   );   // 根據下標，滾動到相對應的元素   let el = foodlist[index];   // 滾動到對應元素的位置   this.foodScroll.scrollToElement(el, 100);  } }};</script>

<style scoped>.goods { display: -webkit-box; display: -ms-flexbox; display: flex; position: absolute; top: 190px; bottom: 51px; overflow: hidden; width: 100%;}.goods .menu-wrapper { -webkit-box-flex: 0; -ms-flex: 0 0 85px; flex: 0 0 85px; background: #f4f4f4;}.goods .menu-wrapper .menu-item { padding: 16px 23px 15px 10px; border-bottom: 1px solid #e4e4e4; position: relative;}.goods .menu-wrapper .menu-item.current { background: white; font-weight: bold; margin-top: -1px;}.goods .menu-wrapper .menu-item:first-child.current { margin-top: 1px;}.goods .menu-wrapper .menu-item .text { font-size: 13px; color: #333333; line-height: 17px; vertical-align: middle; -webkit-line-clamp: 2; display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden;}.goods .menu-wrapper .menu-item .text .icon { width: 15px; height: 15px; vertical-align: middle;}.goods .menu-wrapper .menu-item .num { position: absolute; right: 5px; top: 5px; width: 13px; height: 13px; border-radius: 50%; color: white; background: red; text-align: center; font-size: 7px; line-height: 13px;}.goods .foods-wrapper { -webkit-box-flex: 1; -ms-flex: 1; flex: 1; /* background: blue; */}.goods .foods-wrapper .container-list { padding: 11px 11px 0 11px; border-bottom: 1px solid #e4e4e4;}.goods .foods-wrapper .container-list img { width: 100%; margin-bottom: 11px; border-radius: 5px;}.goods .foods-wrapper .food-list { padding: 11px;}.goods .foods-wrapper .food-list .title { height: 13px; font-size: 13px; background: url(btn_yellow_highlighted@2x.png) no-repeat left center; background-size: 2px 10px; padding-left: 7px; margin-bottom: 12px;}.goods .foods-wrapper .food-list .food-item { display: flex; margin-bottom: 25px; position: relative;}.goods .foods-wrapper .food-list .food-item .icon { flex: 0 0 63px; background-position: center; background-size: 120% 100%; background-repeat: no-repeat; margin-right: 11px; height: 75px;}.goods .foods-wrapper .food-list .food-item .content { flex: 1;}.goods .foods-wrapper .food-list .food-item .content .name { font-size: 16px; line-height: 21px; color: #333333; margin-bottom: 10px; padding-right: 27px;}.goods .foods-wrapper .food-list .food-item .content .desc { font-size: 10px; line-height: 19px; color: #bfbfbf; margin-bottom: 8px; /* 超出部分顯示省略號*/ -webkit-line-clamp: 1; display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden;}.goods .foods-wrapper .food-list .food-item .content .extra { font-size: 10px; color: #bfbfbf; margin-bottom: 7px;}.goods .foods-wrapper .food-list .food-item .content .extra .saled { margin-right: 14px;}.goods .foods-wrapper .food-list .food-item .content .product { height: 15px; margin-bottom: 6px;}.goods .foods-wrapper .food-list .food-item .content .price { font-size: 0;}.goods .foods-wrapper .food-list .food-item .content .price .text { font-size: 14px; color: #fb4e44;}.goods .foods-wrapper .food-list .food-item .content .price .unit { font-size: 12px; color: #bfbfbf;}</style>

https://cn.vuejs.org/v2/api/#...<template> <div class="cartcontrol">  <transition name="move">   <div class="cart-decrease" @click="decreaseCart" v-show="food.count">    <span class="inner icon-remove_circle_outline"></span>   </div>  </transition>  <div class="cart-count" v-show="food.count">{{food.count}}</div>  <div class="cart-add icon-add_circle" @click="increaseCart">   <i class="bg"></i>  </div> </div></template><script>import Vue from 'vue'export default { props:{  food:{   type:Object  } }, methods:{  decreaseCart(){   this.food.count--;  },  increaseCart(){   if(!this.food.count){    Vue.set(this.food,'count',1);   }else{    this.food.count++;   }  }   }};</script><!-- Add "scoped" attribute to limit CSS to this component only --><style scoped>.cartcontrol { font-size: 0;}.cartcontrol .cart-decrease { display: inline-block; width: 26px; height: 26px; font-size: 26px; color: #b4b4b4;}.cartcontrol .cart-count { display: inline-block; width: 25px; text-align: center; font-size: 12px; line-height: 26px; vertical-align: top;}.cartcontrol .cart-add { display: inline-block; width: 26px; height: 26px; font-size: 26px; color: #ffd161; position: relative;}.cartcontrol .cart-add .bg { width: 20px; height: 20px; border-radius: 50%; background: black; position: absolute; left: 3px; top: 3px; z-index: -1;}.move-enter-active,.move-leave-active { transition: all 0.5s linear;}.move-enter,.move-leave-to { transform: translateX(20px) rotate(180deg);}</style>

<template> <div class="shopcart" :class="{'highligh':totalCount>0}">  <div class="shopcart-wrapper">   <div class="content-left">    <div class="logo-wrapper" :class="{'highligh':totalCount>0}">     <span class="icon-shopping_cart logo" :class="{'highligh':totalCount>0}"></span>     <i class="num" v-show="totalCount">{{totalCount}}</i>    </div>    <div class="desc-wrapper">     <p class="total-price" v-show="totalPrice">￥{{totalPrice}}</p>     <p class="tip" :class="{'highligh':totalCount>0}">另需{{shipping_fee_tip}}</p>    </div>   </div>   <div class="content-right" :class="{'highligh':totalCount>0}">{{payStr}}</div>  </div> </div></template><script>// 導入BScrollimport BScroll from "better-scroll";export default { props: {  min_price_tip: {   type: String,   default: ""  },  shipping_fee_tip: {   type: String,   default: ""  },  selectFoods: {   type: Array,   default() {    return [     /* {      min_price: 10,      count: 3     },     {      min_price: 7,      count: 1     } */    ];   }  } }, computed: {  // 總個數 將所選商品的個數累加得到總個數。  totalCount() {   let num = 0;   this.selectFoods.forEach(food => {    num += food.count;   });   return num;  },  // 總金額  totalPrice() {   let total = 0;   this.selectFoods.forEach(food => {    total += food.min_price * food.count;   });   return total;  },  // 結算按鈕顯示  payStr() {   if (this.totalCount > 0) {    return "去結算";   } else {    return this.min_price_tip;   }  } }, components: {  BScroll }};</script><style>.shopcart-wrapper { width: 100%; height: 51px; background: #514f4f; position: fixed; left: 0; bottom: 0; display: flex; z-index: 99;}.shopcart-wrapper.highligh { background: #2d2b2a;}.shopcart-wrapper .content-left { flex: 1;}.shopcart-wrapper .content-left .logo-wrapper { width: 50px; height: 50px; background: #666666; border-radius: 50%; position: relative; top: -14px; left: 10px; text-align: center; float: left;}.shopcart-wrapper .content-left .logo-wrapper.highligh { background: #ffd161;}.shopcart-wrapper .content-left .logo-wrapper .logo { font-size: 28px; color: #c4c4c4; line-height: 50px;}.shopcart-wrapper .content-left .logo-wrapper .logo.highligh { color: #2d2b2a;}.shopcart-wrapper .content-left .logo-wrapper .num { width: 15px; height: 15px; line-height: 15px; border-radius: 50%; font-size: 9px; color: white; background: red; position: absolute; right: 0; top: 0;}.shopcart-wrapper .content-left .desc-wrapper { float: left; margin-left: 13px;}.shopcart-wrapper .content-left .desc-wrapper .total-price { font-size: 18px; line-height: 33px; color: white;}.shopcart-wrapper .content-left .desc-wrapper .tip { font-size: 12px; color: #bab9b9; line-height: 51px;}.shopcart-wrapper .content-left .desc-wrapper .tip.highligh { line-height: 12px;}.shopcart-wrapper .content-right { flex: 0 0 110px; font-size: 15px; color: #bab9b9; line-height: 51px; text-align: center; font-weight: bold;}.shopcart-wrapper .content-right.highligh { background: #ffd161; color: #2d2b2a;}.shopcart-wrapper .shopcart-list { position: absolute; left: 0; top: 0; z-index: -1; width: 100%;}.shopcart-wrapper .shopcart-list.show { transform: translateY(-100%);}.shopcart-wrapper .shopcart-list .list-top { height: 30px; text-align: center; font-size: 11px; background: #f3e6c6; line-height: 30px; color: #646158;}.shopcart-wrapper .shopcart-list .list-header { height: 30px; background: #f4f4f4;}.shopcart-wrapper .shopcart-list .list-header .title { float: left; border-left: 4px solid #53c123; padding-left: 6px; line-height: 30px; font-size: 12px;}.shopcart-wrapper .shopcart-list .list-header .empty { float: right; line-height: 30px; margin-right: 10px; font-size: 0;}.shopcart-wrapper .shopcart-list .list-header .empty img { height: 14px; margin-right: 9px; vertical-align: middle;}.shopcart-wrapper .shopcart-list .list-header .empty span { font-size: 12px; vertical-align: middle;}.shopcart-wrapper .shopcart-list .list-content { max-height: 360px; overflow: hidden; background: white;}.shopcart-wrapper .shopcart-list .list-content .food-item { height: 38px; padding: 12px 12px 10px 12px; border-bottom: 1px solid #f4f4f4;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper { float: left; width: 240px;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper .desc-left { float: left; width: 170px;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper .desc-left .name { font-size: 16px; margin-bottom: 8px; /* 超出部分隱藏*/ -webkit-line-clamp: 1; display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden; height: 16px;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper .desc-left .unit { font-size: 12px; color: #b4b4b4;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper .desc-left .description { font-size: 12px; color: #b4b4b4; /* 超出部分隱藏*/ overflow: hidden; height: 12px;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper .desc-right { float: right; width: 70px; text-align: right;}.shopcart-wrapper .shopcart-list .list-content .food-item .desc-wrapper .desc-right .price { font-size: 12px; line-height: 38px;}.shopcart-wrapper .shopcart-list .list-content .food-item .cartcontrol-wrapper { float: right; margin-top: 6px;}.shopcart .shopcart-mask { position: fixed; top: 0; right: 0; width: 100%; height: 100%; z-index: 98px; background: rgba(7, 17, 27, 0.6);}</style>