wxmini/pages/piano/firmware/firmware.wxml

<view>
  <nav-bar bind:goBack="_goBack" nav-bgc-class="ex-nav-bgc-class" nav-title-class="ex-nav-title-class" ex-back-pre="ex-back-pre" navbar-data='{{nvabarData}}'>
  </nav-bar>

  <view style="margin-top: 100rpx;"></view>

  <view wx:for="{{topList}}" wx:key="key" wx:for-item="item" wx:for-index="index">
    <view class="top_item" data-index="{{index}}">
      <view class="top_item_left">{{item.title}}</view>
      <view class="top_item_right">{{item.name}}</view>
    </view>
  </view>

  <view class="update">
    <view bindtap="toUpdate" class="{{isUpdated ? 'action' : ''}}">固件更新</view>
  </view>

  <!-- <view class="container"> -->
  <!-- 点击按钮显示升级进度条弹窗 -->
  <!-- <button bindtap="showUpgradeProgress">升级应用</button> -->


  <!-- </view> -->



  <view class="container">
    <!-- 点击按钮显示带背景黑蒙版的弹窗 -->
    <button bindtap="showProgressModal">显示带背景黑蒙版的弹窗</button>

    <!-- 背景黑蒙版 -->
    <view class="mask" wx:if="{{showModal}}"></view>

    <!-- 自定义模态框，用于显示带进度条的弹窗 -->
    <view class="modal" wx:if="{{showModal}}">
      <text>正在升级中</text>
      <progress percent="{{progress}}" stroke-width="4" />
    </view>
  </view>



</view>