微信小程序scroll-view指定滚动元素起始位置怎么做

  <scroll-view enable-flex scroll-x class="scroll-x" scroll-into-view="{{scrollIntoView}}" style="height: 120rpx;width: 100%;">
    <view id="{{item.id ? item.id : index}}" wx:for="{{monthList}}" wx:key="index" class="view_item" style="position: relative;">
      <view wx:if="{{item.month == 1}}" style="position: absolute;top: -55rpx;left:40rpx;font-size: 24rpx;color:#a1a1a1;height: 60rpx;">{{item.year}}</view>
      <view style="background-color: {{item.background ? item.background : '#f0f8fa'}};" class="view_item_time" bindtap="clickItem" data-item="{{index}}">{{item.month}}月</view>
    </view>
  </scroll-view>

  data: {
    dateList:[],
    timeList:[],
    showCalender: false,
    date: "",
    minDate:'',
    maxDate:'',
    scrollIntoView:'',
  },

 // 获取当前年月日
  getCurrentDate(index) {
    var datetime = new Date();
    var year = datetime.getFullYear();
    var month = datetime.getMonth() + 1 < 10 ? '0' + (datetime.getMonth() + 1) : datetime.getMonth() + 1;
    var date = datetime.getDate() < 10 ? '0' + datetime.getDate() : datetime.getDate();
    var time = year + '/' + month + '/' + date
    // 获取当前日期加上30天后的日期,限制日历只能选择后30天
    var date1 = new Date();
    var date2 = new Date(date1);
    // 设置一个月的某一天
    date2.setDate(date1.getDate() + 30);
    let dateLater = date2.getFullYear() + "/" + (date2.getMonth() + 1) + "/" + date2.getDate()
    // 日历中的最小和最大可选日期
    this.setData({minDate:new Date(time).getTime(),maxDate:new Date(dateLater).getTime()})
    // 获取当前日期加上某天后的日期
    let dateList = [],timeList = [],weekList = []
    for(let i = 0;i <= 30;i++) {
      dateList[i] = new Date(date1)
      // 列表展示需要的数据
      dateList[i].setDate(date1.getDate() + i)
      // 请求接口需要的完整日期数据
      timeList[i] = dateList[i].getFullYear() + "/" + (dateList[i].getMonth() + 1)  + "/" + dateList[i].getDate()
      // 获取星期几
      weekList[i] = dateList[i].getDay()
    }
    dateList = dateList.map(item => {
      return item.getDate()
    })
    weekList = weekList.map(item => {
      if(item === 0) {
        return '周日'
      } else if(item == 1) {
        return '周一'
      } else if(item == 2) {
        return '周二'
      } else if(item == 3) {
        return '周三'
      } else if(item == 4) {
        return'周四'
      } else if(item == 5) {
        return '周五'
      } else if(item == 6) {
        return '周六'
      }
    })
    dateList = dateList.map(item => {
      return {date:item}
    })
    if(index) {
    	 // 选择了日历中的日期，设置对应滑动列表中的id
      dateList[index].background = '#00bcd4'
      dateList[index].color = '#fff'
      dateList[index].id = 'target'
    } else {
    	 // 没有选择日历，默认设置滑动列表中第一条数据的id
      dateList[0].background = '#00bcd4'
      dateList[0].color = '#fff'
      dateList[0].id = 'target'
    }
    dateList.map((item1,index1) => {
      weekList.map((item2,index2) => {
        if(index1 === index2) {
          item1.week = item2
        }
      })
    })
    // 给scroll-view设置
    this.setData({dateList,timeList,scrollIntoView:'target'})
  },

<van-calendar poppable row-height='50' min-date="{<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->{minDate}}" max-date="{<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->{maxDate}}" show="{<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->{ showCalender }}" color='rgba(0, 188, 212, 1)' show-title='{<!--{cke_protected}{C}%3C!%2D%2D%20%2D%2D%3E-->{false}}' close-on-click-overlay show-confirm bind:confirm="chooseDate" bind:close='closeCalender' />

<scroll-view enable-flex scroll-x class="scroll-x" scroll-into-view="{{scrollIntoView}}">
  <view id="{{item.id ? item.id : index}}" style="background-color: {{item.background ? item.background : '#fff'}};color: {{item.color ? item.color : '#000'}};" class="date-item" bindtap="clickDate" wx:for="{{dateList}}" wx:key="index" data-index="{{index}}">
     <view class="item-week">{{item.week}}</view>
     <view class="item-date">{{item.date}}</view>
   </view>
</scroll-view>

  chooseDate(e) {
    let timeStamp = new Date(Date.parse(e.detail))
    let year = timeStamp.getFullYear()
    let month = timeStamp.getMonth() + 1
    let day = timeStamp.getDate()
    let date = `${year}/${month}/${day}`
    this.setData({
      date,
      showCalender: false
    })
    this.data.timeList.map((item,index) => {
      if(item === date) { 
      // 选中日历中的日期与滑动列表中的日期相等
      // 每选一次日历日期都重新渲染一下滑动列表中的数据
        this.getCurrentDate(index)
        setTimeout(() => { this.getCurrentDate(index)},500)
      } else {              
        this.data.dateList[index].id = index
        this.data.dateList[index].background = '#fff'
        this.data.dateList[index].color = '#000'
      }
    })
    this.setData({dateList:this.data.dateList})
  },