多选picker，在bindcolumnchange中修改range后，选中的值会弹回去

 startDateYearColumnChange:function({detail}){
      console.log("detail", detail, this.data.startDateRange[0][detail.value]);
      console.log("startDateRange", this.data.startDateRange);
      if(detail.column == 0 && detail.value == 2){
        this.setData({
          'startDateRange[1]':[6, 5, 4, 3, 2, 1]
        })
      } else {
        this.setData({
          'startDateRange[1]':[11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1]
        })
      }
  }

<picker 
    class="picker"
    mode="multiSelector"
    range="{{ startDateRange }}"
    bindchange="changeStartDate"
    bindcolumnchange="startDateYearColumnChange"
    bindcancel="startDateSeleteCancel"
    >

据我分析是因为改变了range绑定值的地址改变了，求问怎么解决这个问题