omp-wx/pages/menu/bindDevice/bindDevice.wxml

<form bindsubmit="submit">

  <view class="btn-form-wapper">
    <van-button type="primary" custom-class="btn-form" form-type="submit">添加</van-button>
  </view>

  <van-field required value="{{deviceNum}}" label="设备码" name="openNum" placeholder="请输入设备码" error-message="{{openNumError}}">
    <van-icon slot="right-icon" name="scan" bindtap="scanCode" />
  </van-field>

  <van-field required label="名称" name="deviceName" placeholder="请输入设备名称" error-message="{{deviceNameError}}" />

</form>