vue基于better-scroll制作左右联动滑动页面

左手的ㄟ右手 2022-04-08 11:09 208阅读 0赞

界面如下：  
![在这里插入图片描述][20181213144845330.png]  
vue模板

<template>
      <div class="goods">
        <div class="menu-wrapper">
          <ul>
            <li class="menu-item" v-for="(good, index) in goods" :key="index" 
                :class="{current: currentIndex===index}" @click="clickMenuItem(index)">
              <span class="text bottom-border-1px">
                <img :src="good.icon" class="icon" v-if="good.icon">
                {
       {good.name}}
              </span>    
            </li>
          </ul>
        </div>
        <div class="foods-wrapper">
          <ul ref="foodsWrapperUl">
            <li class="food-list food-list-hook" v-for="(good, index) in goods" :key="index">
              <h1 class="title">{
       {good.name}}</h1>
              <ul>
                <li class="food-item bottom-border-1px" v-for="(food, index) in good.foods" :key="index">
                  <div class="icon">
                    <img :src="food.icon" width="57" height="57" alt="">
                  </div>
                  <div class="content">
                    <h2 class="name">{
       {food.name}}</h2>
                    <p class="desc">{
       {food.description}}</p>
                    <div class="extra">
                      <span class="count">月售{
       {food.sellCount}}份</span>
                      <span>好评{
       {food.rating}}%</span>
                    </div>
                    <div class="price">
                      <span class="now">￥{
       {food.price}}</span>
                      <span class="old" v-if="food.oldPrice">￥{
       {food.oldPrice}}</span>
                    </div>
                    <div class="cartcontrol-wrapper"><cartcontrol :food="food"/></div>
                  </div>
                </li>
              </ul>
            </li>
          </ul>
        </div>
      </div>
    </template>
    
    <script>
      import BScroll from 'better-scroll'
      import { mapState } from 'vuex'
      import CartControl from "../../../components/CartControl/CartControl"
      export default {
        data() { 
          return {
            scrollY: 0,
            tops: []
          }
        },
        mounted () {
          this.$store.dispatch('getShopGoods', () => {  //回调函数，等到action中执行
            this.$nextTick(() => {  //页面更新后再使用滚动组件，获取DOM高度
              this._initScroll();
              this._initTops();
            })
          })
        },
        methods: {
          _initScroll() {
            new BScroll('.menu-wrapper', {
              click:true
            })
    
            this.foodsScroll = new BScroll('.foods-wrapper', {
              probeType: 2,
              click: true
            })
    
            this.foodsScroll.on('scroll', (pos) => {
              this.scrollY = Math.abs(pos.y);
            })
    
            this.foodsScroll.on('scrollEnd', (pos) => {
              this.scrollY = Math.abs(pos.y);
            })
          },
    
          _initTops () {
            const tops = [];
            let top = 0;
            tops.push(top);
            const lis = this.$refs.foodsWrapperUl.getElementByClassName('food-list-hook');
            Array.prototype.slice.call(lis).forEach((li, index) => {
              top += li.clientHeight;
              tops.push(top);
            })
            this.tops = tops;
          },
    
          clickMenuItem (index) {
            const top = this.tops[index];
            this.scrollY = top;
            this.foodsScroll.scrollTo(0, -top, 300)
          }
        },
    
        computed: {
          ...mapState(['goods']),
          currentIndex () {
            return this.tops.findIndex((top, index) => {
              return this.scrollY>=top && this.scrollY<this.tops[index+1]
            })
          }
        }
      }
    </script>//也可以不用计算属性，直接在data中定义currentIndex，改动时赋新值，那页面自然跟着更新

state.js

goods: [], // 商品列表

action.js

//异步获取商品列表
        async getShopGoods ({commit}, callback) {
            const result = await reqShopGoods();
            const goods = result.data;
            commit(RECEIVE_GOODS, {goods});
            callback && callback();
        }

mutation.js

[RECEIVE_GOODS](state, {goods}) {
        state.goods = goods
      }

[20181213144845330.png]: /images/20220405/e4ca6780b7324c368ef5e05ed79e2ef7.png