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>