小視頻源碼Vue商品左欄目滑動跟右邊內容展示的變化

Template

<template>
  <div class="goods">
    <div class="menu-wrapper" ref="menuWrapper">
      <ul>
        <li v-for="(item,index) in goods" :key="item.id" class="menu-item" :class="{'current':currentIndex === index}" @click="selectMenu(index,$event)">
          <span class="text border-1px">
            <span  v-show="item.type >0"  class="icon" :class="classMap[item.type]"></span>
            <span>{{item.name}}</span>
          </span>
        </li>
      </ul>
    </div>
    <div class="foods-wrapper" ref="foodsWrapper">
      <ul>
        <li v-for="item in goods" class="food-list food-list-hook" :key="item.id">
          <h1 class="title">{{item.name}}</h1>
          <ul>
            <li v-for="food in item.foods" class="food-item border-1px" :key="food.id">
              <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 style="margin-right: 12px;">月售{{food.sellCount}}</span><span>好評率{{food.rating}}%</span>
                </div>
                <div class="price">
                  <span class="now">¥{{food.price}}</span>
                  <span class="old" v-show="food.oldPrice">¥{{food.oldPrice}}</span>
                </div>
              </div>
            </li>
          </ul>
        </li>
      </ul>
    </div>
    <shopcart></shopcart>
  </div>
</template>

JS

<script type="text/ecmascript-6">
import BScroll from 'better-scroll'
import shopcart from '../../components/shopcart/shopcart'
export default {
  name: 'goods',
  data () {
    return {
      goods: [],
      listHeight: [],
      scrollY: 0
    }
  },
  props: {
    seller: {
      type: Object
    }
  },
  created () {
    this.$http.get('http://localhost:3003/goods').then((response) => {
      if (response.status === 200) {
        this.goods = response.body
        this.$nextTick(() => {
          this._initScroll()
          this._calculateHeight()
        })
        console.log(this.goods)
      } else {
        console.log(response.body)
      }
    })
    this.classMap = ['decrease', 'discount', 'special', 'invoice', 'guarantee']
  },
  computed: {
    currentIndex () {
      for (let i = 0; i < this.listHeight.length; i++) {
        let height = this.listHeight[i]
        let height2 = this.listHeight[i + 1]
        if (!height2 || (this.scrollY >= height && this.scrollY < height2)) {
          console.log(i)
          if (i >= 8) {
            this.meunScroll.scrollTo(0, -39 - ((i - 8) * 54))
          } else if (i === 0) {
            this.meunScroll.scrollTo(0, 0)
          }
          return i
        }
      }
      return 0
    }
  },
  methods: {
    _initScroll () {
      this.meunScroll = new BScroll(this.$refs.menuWrapper, {
        // 取消點擊不出發
        click: true
      })
      this.foodsScroll = new BScroll(this.$refs.foodsWrapper, {
        // 探針作用，實時監測滾動位置
        probeType: 3
      })
      this.foodsScroll.on('scroll', (pos) => {
        this.scrollY = Math.abs(Math.round(pos.y))
      })
    },
    _calculateHeight () {
      let foodList = this.$refs.foodsWrapper.getElementsByClassName('food-list-hook')
      let height = 0
      this.listHeight.push(height)
      for (let i = 0; i < foodList.length; i++) {
        let item = foodList[i]
        height += item.clientHeight
        this.listHeight.push(height)
      }
    },
    selectMenu (index, event) {
      // 判斷點擊事件
      if (!event._constructed) {
        return
      }
      let foodList = this.$refs.foodsWrapper.getElementsByClassName('food-list-hook')
      let el = foodList[index]
      this.foodsScroll.scrollToElement(el, 300)
      console.log(index)
    }
  },
  components: {
    shopcart
  }
}
</script>

CSS(我在vue項目中用的Stylus)

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixin.styl"
  .goods
    display flex
    position absolute
    top 174px
    bottom 46px
    width 100%
    overflow hidden
    .menu-wrapper
      flex 0 0 80px
      width 80px
      background #f3f5f7
      .menu-item
        display table
        height 54px
        width 56px
        line-height 14px
        padding 0 12px
        &.current
          background #fff
          position relative
          z-index 10
          font-weight 700
          margin-top -1px
          .text
            border-none()
        .icon
          display: inline-block
          vertical-align top
          width: 12px
          height:12px
          margin-right: 2px
          background-size: 12px 12px
          background-repeat: no-repeat
          &.decrease
            bg-image('decrease_3')
          &.discount
            bg-image('discount_3')
          &.guarantee
            bg-image('guarantee_3')
          &.invoice
            bg-image('invoice_3')
          &.special
            bg-image('special_3')
        .text
          display table-cell
          width 56px
          vertical-align middle
          font-size 12px
          border-1px(rgba(7,17,27,0.1))
    .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
      .food-item
        display flex
        margin 18px
        padding-bottom 18px
        border-1px(rgba(7,17,27,0.1))
        &last-child
          border-none()
          margin-bottom 0
        .icon
          flex: 0 0 57px
          margin-right 10px
        .content
          flex 1
          .name
            font-size 14px
            margin 2px 0 8px 0
            height 14px
            line-height 14px
            color rgb(7,17,27)
          .desc,.extra
            font-size 10px
            line-height 10px
            color rgb(147,153,159)
          .desc
            margin-bottom 8px
            line-height 12px
          .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)
</style>
mixin.styl

border-1px($color)
  position relative
  &:after
    display block
    position absolute
    left 0
    bottom 0
    width 100%
    border-top: 1px solid $color
    content: ' '
border-none()
  &:after
    display none
bg-image($url)
  background-image: url($url+"@2x.png")
  @media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3)
    background-image: url($url + "@3x.png")