mini-ar-demo/miniprogram/pages/myth/myth.wxml

<view class="page">
  <navigation-bar title="{{'四维AR'}}" back="{{true}}" />
  <view class="loading" wx:if="{{!loaded}}">
    <text>素材{{progress}}%载入中</text>
  </view>
  <xr-ar-vio-marker disable-scroll id="main-frame" width="{{renderWidth}}" height="{{renderHeight}}" style="width:{{width}}px;height:{{height}}px;top:{{top}}px;left:{{left}}px;display:block;" bind:loaded="handleLoaded" 
  bind:progress="handleProgress"
  />


</view>