Vue仿制外卖点餐界面的左右侧菜单联动：点击左侧使右侧滚动到对应位置，右侧滚动时选中左侧对应选项

首先安装依赖

yarn add better-scroll
// better-scroll 是一个移动端滚动的解决方案，它是基于 iscroll 的重写
yarn add stylus-loader@3.0.2 --save-dev
//使用模块化的方法去写css代码

示例图片

<template>
  <div>
    <div class="goods">
      <div class="menu-wrapper">
        <ul>
          <li
            class="menu-item"
            v-for="(good, index) in goods"
            :key="index"
            :class="{ current: index === currentIndex }"
            @click="clickMenuItem(index)"
          >
            <span class="text">
              <img class="icon" :src="good.icon" v-if="good.icon" />
              {
    
    {
    
     good.name }}
            </span>
          </li>
        </ul>
      </div>
      <div class="foods-wrapper">
        <ul ref="foodsUl">
          <li
            class="food-list-hook"
            v-for="(good, index) in goods"
            :key="index"
          >
            <h1 class="title">{
    
    {
    
     good.name }}</h1>
            <ul>
              <li
                class="food-item"
                v-for="(food, index) in good.foods"
                :key="index"
              >
                <div class="icon">
                  <img width="57" height="57" :src="food.icon" />
                </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>好评率{
    
    {
    
     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>
              </li>
            </ul>
          </li>
        </ul>
      </div>
    </div>
  </div>
</template>
<script>
import BScroll from "better-scroll";
export default {
    
    
  data() {
    
    
    return {
    
    
      scrollY: 0, // 右侧滑动的Y轴坐标 (滑动过程时实时变化)
      tops: [], // 所有右侧分类li的top组成的数组  (列表第一次显示后就不再变化)
      goods: [
        {
    
    
          icon: "http://liangziqi.top/meme-img/126-430.jpg",
          name: "优惠",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "瑶",
              description: "公主",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "安琪拉",
              description: "双马尾",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
        {
    
    
          icon: "http://liangziqi.top/meme-img/126-430.jpg",
          name: "折扣",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "小乔",
              description: "扇子",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "王昭君",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
        {
    
    
          name: "法师",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "小乔",
              description: "扇子",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "王昭君",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "王昭君",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "王昭君",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
        {
    
    
          name: "辅助",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "瑶",
              description: "公主",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "蔡文姬",
              description: "kkk",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "东皇",
              description: "hhh",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "孙膑",
              description: "666",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
        {
    
    
          name: "射手",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "伽罗",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "后裔",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "狄仁杰",
              description: "hhh",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "公孙离",
              description: "666",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
        {
    
    
          name: "打野",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "李白",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "百里玄策",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "韩信",
              description: "hhh",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "孙悟空",
              description: "666",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
        {
    
    
          name: "坦克",
          foods: [
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "亚瑟",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "项羽",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "凯",
              description: "hhh",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "夏侯惇",
              description: "666",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "亚瑟",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "项羽",
              description: "",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "凯",
              description: "hhh",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
            {
    
    
              icon: "http://liangziqi.top/meme-img/126-430.jpg",
              name: "夏侯惇",
              description: "666",
              sellCount: 1,
              rating: 100,
              price: 2,
              oldPrice: "6",
            },
          ],
        },
      ],
    };
  },
  mounted() {
    
    
    this.$nextTick(() => {
    
    
      this._initScroll();
      this._initTops();
    });
  },
  computed: {
    
    
    // 计算得到当前分类的下标
    currentIndex() {
    
    
      // 初始化和相关数据发生了变化时执行
      // 得到条件数据
      const {
    
     scrollY, tops } = this;
      // 根据条件计算产生一个结果
      const index = tops.findIndex((top, index) => {
    
    
        // scrollY>=当前top && scrollY<下一个top
        return scrollY >= top && scrollY < tops[index + 1];
      });
      // 返回结果
      return index;
    },
  },
  methods: {
    
    
    // 初始化滚动
    _initScroll() {
    
    
      // 列表显示之后创建
      new BScroll(".menu-wrapper", {
    
    
        click: true,
      });
      this.foodsScroll = new BScroll(".foods-wrapper", {
    
    
        probeType: 2, // 因为惯性滑动不会触发
        click: true,
      });

      // 给右侧列表绑定scroll监听
      this.foodsScroll.on("scroll", ({
    
     x, y }) => {
    
    
        console.log("scroll", x, y);
        this.scrollY = Math.abs(y);
      });
      // 给右侧列表绑定scroll结束的监听
      this.foodsScroll.on("scrollEnd", ({
    
     x, y }) => {
    
    
        console.log("scrollEnd", x, y);
        this.scrollY = Math.abs(y);
      });
    },
    // 初始化tops
    _initTops() {
    
    
      // 1. 初始化tops
      const tops = [];
      let top = 0;
      tops.push(top);
      // 2. 收集
      // 找到所有分类的li
      const lis = this.$refs.foodsUl.getElementsByClassName("food-list-hook");
      Array.prototype.slice.call(lis).forEach((li) => {
    
    
        top += li.clientHeight;
        tops.push(top);
      });

      // 3. 更新数据
      this.tops = tops;
      console.log(tops);
    },

    clickMenuItem(index) {
    
    
      console.log(index);
      // 使用右侧列表滑动到对应的位置

      // 得到目标位置的scrollY
      const scrollY = this.tops[index];
      // 立即更新scrollY(让点击的分类项成为当前分类)
      this.scrollY = scrollY;
      // 平滑滑动右侧列表
      this.foodsScroll.scrollTo(0, -scrollY, 300);
    },
  },
};
</script>
<style lang="stylus" rel="stylesheet/stylus">
bottom-border-1px($color) {
    
    
  position: relative;
  border: none;

  &:after {
    
    
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background-color: $color;
    transform: scaleY(0.5);
  }
}

.goods {
    
    
  display: flex;
  position: absolute;
  top: 15px;
  bottom: 46px;
  width: 100%;
  background: #fff;
  overflow: hidden;

  .menu-wrapper {
    
    
    flex: 0 0 80px;
    width: 80px;
    background: #f3f5f7;

    .menu-item {
    
    
      display: table;
      height: 54px;
      width: 56px;
      padding: 0 12px;
      line-height: 14px;

      &.current {
    
    
        position: relative;
        z-index: 10;
        margin-top: -1px;
        background: #fff;
        color: $green;
        font-weight: 700;
      }

      .icon {
    
    
        display: inline-block;
        vertical-align: top;
        width: 12px;
        height: 12px;
        margin-right: 2px;
        background-size: 12px 12px;
        background-repeat: no-repeat;
      }

      .text {
    
    
        display: table-cell;
        width: 56px;
        vertical-align: middle;
        bottom-border-1px(rgba(7, 17, 27, 0.1));
        font-size: 12px;
      }
    }
  }

  .foods-wrapper {
    
    
    flex: 1;

    .title {
    
    
      padding-left: 14px;
      height: 26px;
      line-height: 26px;
      border-left: 2px solid #d9dde1;
      font-size: 12px;
      color: rgb(147, 153, 159);
      background: #f3f5f7;
      text-align: left;
      margin: 0;
    }

    .food-item {
    
    
      display: flex;
      margin: 18px;
      padding-bottom: 18px;
      bottom-border-1px(rgba(7, 17, 27, 0.1));

      &:last-child {
    
    
        margin-bottom: 0;
      }

      .icon {
    
    
        flex: 0 0 57px;
        margin-right: 10px;
      }

      .content {
    
    
        flex: 1;
        text-align: left;

        .name {
    
    
          margin: 2px 0 8px 0;
          height: 14px;
          line-height: 14px;
          font-size: 14px;
          color: rgb(7, 17, 27);
        }

        .desc, .extra {
    
    
          line-height: 10px;
          font-size: 10px;
          color: rgb(147, 153, 159);
        }

        .desc {
    
    
          line-height: 12px;
          margin-bottom: 8px;
        }

        .extra {
    
    
          .count {
    
    
            margin-right: 12px;
          }
        }

        .price {
    
    
          font-weight: 700;
          line-height: 24px;

          .now {
    
    
            margin-right: 8px;
            font-size: 14px;
            color: rgb(240, 20, 20);
          }

          .old {
    
    
            text-decoration: line-through;
            font-size: 10px;
            color: rgb(147, 153, 159);
          }
        }
      }
    }
  }
}

li {
    
    
  list-style: none;
}

ul {
    
    
  padding: 0;
  margin: 0;
}
</style>