应该是使用了better-scroll的原因，默认它会阻止touch事件。所以在配置中需要加上click: true

// better-scroll的原因，默认它会阻止touch事件。所以在配置中需要加上click: true
// myScroll = newIScroll('#wrapper', { mouseWheel: true, click: true, tap: true });
this.scroll = new Bscroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })

具体的配置还可以查看 https://github.com/ustbhuangyi/better-scroll

<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">{{this.$store.state.city}}</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"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div
        class="area"
        v-for="(item,key) of cities"
        :key="key"
        :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div
          class="item-list"
          v-for="innerItem of item"
          :key="innerItem.id"
          @click="handleCityClick(innerItem.name)"
        >
          <div class="item border-bottom">{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  methods: {
    handleCityClick (city) {
      // this.$store.dispatch('changeCity', city)
      this.$store.commit('changeCity', city) // 数据少可以直接调用commit对mutations传数据
      this.$router.push('/') // 回到首页
    }
  },
  // 侦听器，数据发生变化，自动触发
  watch: {
    letter () {
      // console.log(this.letter)
      if (this.letter) {
        // 字符串去空格aa.replace(/\s/g,'')
        const element = this.$refs[this.letter.replace(/\s/g, '')][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  // 生命周期函数mounted，在页面DOM挂载完之后执行
  mounted () {
    // better-scroll的原因，默认它会阻止touch事件。所以在配置中需要加上click: true
    // myScroll = newIScroll('#wrapper', { mouseWheel: true, click: true, tap: true });
    this.scroll = new Bscroll(this.$refs.wrapper, { mouseWheel: true, click: true, tap: true })
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color:#ccc
    &:after
      border-color:#ccc
  .border-bottom
    &:before
      border-color:#ccc
  .list
    overflow:hidden
    position:absolute
    top:1.58rem
    left:0
    right:0
    bottom:0
    .title
      line-height:.54rem
      background:#eee
      padding-left:.2rem
      color:#666
      font-size:.26rem
    .button-list
      overflow:hidden
      padding:.1rem .6rem .1rem .1rem
      .button-wrapper
        float:left
        width:33.33%
        .button
          margin:.1rem
          padding:.1rem
          text-align:center
          border:.02rem solid #ccc
          border-radius:.06rem
    .item-list
      .item
        line-height:.76rem
        padding-left:.2rem
</style>