!!! 已解决，可能是浏览器问题，代码没问题，切换机型就好了

列表滚动这一节中，我发现当我把数据替换为动态数据之后BetterScroll不能正常工作，但是在我更新了BetterScroll的配置项的时候，页面就能滚动了，但是再刷新页面后就又不能正常滚动了，请问老师这是怎么回事？我查看了源代码没发现问题。

在本地服务器运行之后，来回切换这行代码就能让滚动正常进行，刷新页面滚动就失效了。
this.scroll = new BetterScroll(this.$refs.wrapper,)<=>this.scroll=newBetterScroll(this.$refs.wrapper, {})

源代码

<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">
              潍坊
            </div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item of hot" :key="item.id">
            <div class="button">
              {{item.name}}
            </div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, key) of cities" :key="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import BetterScroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hot: Array
  },
  mounted () {
    this.scroll = new BetterScroll(this.$refs.wrapper, {})
  }
}
</script>
<style lang="stylus" scoped>
  @import '~$styles/variables.styl'
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .list
    overflow hidden
    position absolute
    top 1.68rem
    left 0
    right 0
    bottom 0
    .title
      line-height .54rem
      background #eee
      padding-left .2rem
      color #666666
      font-size .26rem
    .button-list
      overflow hidden
      padding .1rem .6rem .1rem .1rem
      .button-wrapper
        float left
        width 33.3333%
        .button
          margin .1rem
          text-align center
          padding .1rem 0
          border .02rem solid #ccc
          border-radius .06rem
    .item-list
      .item
        line-height .76rem
        color #666666
        padding-left .2rem
</style>