Traffic-widget/miniprogram/pages/faceRecognitionVk/index.wxml

<view class="page">
  <camera class="camera" mode="normal" resolution="medium" device-position="front" flash="off" frame-size="medium" bindstop="improperStop" binderror="unauthorized" 	bindinitdone="initialization" >
  </camera>

  <button wx:if="{{!isStartVideo}}" bindtap="initCamera" >录制</button>
  <button wx:if="{{isStartVideo}}" disabled >录制中...</button>
</view>