[BScroll warn]: Can not resolve the wrapper DOM

问题描述： 加载该组件的时候， 浏览器报错。 求指导。

<template>
  <div>
    <div class="search">
      <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div class="search-content" ref="search" v-if="keyword">
      <ul>
        <li class="search-item border-bottom" v-for="item in list" :key="item.id" @click="handleCityClick(item.name)">
          {{ item.name }}
        </li>
        <li class="search-item border-bottom" v-if="hasNoData">没有找到匹配数据！</li>
      </ul>
    </div>
  </div>
</template>

<script lang="ts">
import {defineComponent} from 'vue'
import BScroll from '@better-scroll/core'

export default defineComponent({
  name: "CitySearch",
  props: {
    cities: Object
  },
  data() {
    return {
      keyword: '',
      list: [],
      timer: null,
      uptime: null
    }
  },
  methods: {
    initBscroll() {
      this.scroll = new BScroll(this.$refs.search, {
        scrollY: true
      })
    },
    handleCityClick(cityName: any) {
      this.$store.dispatch('changeCity', cityName);
      this.$router.push('/')
    }
  },
  updated() {
    if (this.uptime) {
      clearTimeout(this.uptime)
    }
    this.uptime = setTimeout(() => {
      this.initBscroll()
    }, 200);
  },
  computed: {
    hasNoData() {
      return !this.list.length
    }
  },
  mounted() {
    //this.scroll = new BScroll(this.$refs.search);
    // this.$nextTick(()=>{
    //   this.scroll = new BScroll(this.$refs.search);
    // });
    // setTimeout(() => {
    //   this.initBscroll()
    // }, 150);
  },
  watch: {
    keyword() {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result;
      }, 50);
    }
  }
})
</script>

<style lang="stylus" scoped>
@import "../src/assets/styles/varibles.styl"

.search
  height .72rem
  padding 0 .1rem
  background $bgColor

  .search-input
    box-sizing border-box
    width 100%
    height .62rem
    padding 0 .1rem
    line-height .62rem
    text-align center
    border-radius .06rem
    color #666

.search-content
  z-index 1
  overflow: hidden
  position absolute
  top 1.58rem
  left 0
  right 0
  bottom 0
  background #eee

  .search-item
    line-height .62rem
    padding-left .2rem
    color #666
    background #ffffff
</style>

https://blog.csdn.net/xueli_2017/article/details/90717920 参考一下

this.$refs.search获取dom元素，而你dom元素让用v-if。当不等于true时获取不到refs.search肯定报错加个判断
if(this.$refs.search){ //非空判断 search存在再赋值
this.scroll = new BScroll(this.$refs.search, {
scrollY: true
})
}