组件之间如何联动button绑定事件执行完如何触发picker点击事件

比如查询按钮点击后返回building数组，如何让选择框自动弹出？

<view class=“weui-cell__ft”>

        <view class=“weui-vcode-btn” bindtap=“queryBuilding”>查询</view>

      </view>

    </view>

     <view class=“section-con lp”>

      <picker bindchange=“bindBuildingPickerChange” value="{{buildingindex}}" range="{{building}}">

        <view class=“picker”>

          {{building[buildingindex]}}

        </view>

      </picker>

    </view>