<van-popup custom-style="height: 50%; width:100%" position="bottom" show="{{ isShow }}" bind:close="onClose">
  <van-picker show-toolbar columns="{{ columns }}" bind:confirm="onConfirm" bind:cancel="onClose" active-class="active-blue">
    <!-- picker修改源码 -->
    <view slot="after" wx:if="{{schoolshow}}">
      <input 
      wx:if="{{schoolshow}}"
      type="text" style="background: #eee;margin-top: 10px;font-size: 13px;width: 200px;height: 60rpx;border-radius: 5px;padding-left: 5px;border-radius: 35rpx"  placeholder="没有我所在的学校,请填写" 
      bindinput="bindCode"
      focus="false"
      auto-focus="false"
      />
    </view>
  </van-picker>
</van-popup>