小程序体验版可以正常使用相机、开发者工具真机调试可以使用相机（小程序设置中相机权限开启了），但是发布之后，相机页面不能打开，微信小程序性能日志中未记录任何错误日志，下面是代码，在跳转到这个页面之前有调用授权代码（小程序设置中相机权限是开启的）

uni.authorize({
    scope: 'scope.camera',
    success() {
        console.log('isAuthCamera')
        this_.goPersonVerify()
    },
    fail(e){
        console.log("fail:openSetting")
        console.log(e)
        Tips.toast("已拒绝相机权限")
    }
})

上面是授权代码，下面是故障页面（用户小程序设置中相机权限是开启的）

<template>
  <view class="page-content">
   <view class="containerV">
    <!-- 标题 -->
    <view class="headerV">
     <view class="top-tips1">
      <view>{{tipsText}}</view>
     </view>
    </view>
    <!-- 拍摄区域 -->
    <view class="contentV">
     <view class="mark"></view>
     <image class="image" v-if="tempImg" mode="widthFix" :src="tempImg" />
     <camera v-if='isAuthCamera' :device-position="devicePosition ?'front': 'back'" class="camera" flash="off" resolution='high' />
    </view>
    <!-- 操作区域 -->
    <view class="footerV">
     <view style="width: 100%;">
      <view v-if="!tempImg" style="width: 100%;">
       <view class="take-photo-bgV">
        <!-- 图片上传 -->
<!--        <view v-show="true" class="btn-change-upload" @click="handleChooseImage" />-->
        <!-- 切换镜头 -->
        <view class="btn-change-camera" @click="handleChangeCameraClick" />
       </view>
      </view>
      <view class="confirmV" v-else>
       <view class="btn-cancel" @click="handleCancelClick">
        取消
       </view>
       <view class="btn-ok" @click="handleOkClick">
        确定
       </view>
      </view>
      <view class="margin-lg"><text class="text-ABC text-bold">{{personVerifyForm.name}}</text></view>
      <view class="margin-lg"><text class="text-ABC text-bold">{{personVerifyForm.idCard}}</text></view>
     </view>
    </view>
   </view>
  </view>
</template>

<script>
import {
  pathToBase64,
} from 'image-tools'
import Tips from "../../common/util/tip";
  export default {
   components:{},
   data() {
    return {
     personVerifyForm:{
      name:'',
      idCard:'',
      imageType:"BASE64",
      image:'',
      passed:'',
      score:'0'
     },
     tipsText: '请将脸部移入框内', // 错误文案提示
     tempImg: '', // 本地图片路径
     cameraEngine: null, // 相机引擎
     devicePosition: true, // 摄像头朝向
     isAuthCamera: true, // 是否拥有相机权限
    };
   },onLoad(options) {
    this.personVerifyForm.name = options.name
    this.personVerifyForm.idCard = options.idCard
    this.init()
   },onShow() {

   },
   methods:{
    handleChangeCameraClick() {  // 切换设备镜头
     console.log('切换设备镜头')
     this.devicePosition = !this.devicePosition;
    },
    init(){
     // #ifdef MP-WEIXIN
      // 1、初始化人脸识别
      wx.initFaceDetect()
     console.log('初始化人脸识别完成wx.createVKSession()')
      // 2、创建 camera 上下文 CameraContext 对象
      this.cameraEngine = wx.createCameraContext()
     console.log('初始化人脸识别完成',this.cameraEngine)
      // 3、获取 Camera 实时帧数据
      const listener = this.cameraEngine.onCameraFrame((frame) => {
       console.log('获取 Camera 实时帧数据')
       if (this.tempImg) {
        return;
       }
       // 4、人脸识别，使用前需要通过 wx.initFaceDetect 进行一次初始化，推荐使用相机接口返回的帧数据
       wx.faceDetect({
        frameBuffer: frame.data,
        width: frame.width,
        height: frame.height,
        enablePoint: true,
        enableConf: true,
        enableAngle: true,
        enableMultiFace: true,
        success: (faceData) => {
         let face = faceData.faceInfo[0]
         if (faceData.x == -1 || faceData.y == -1) {
          this.tipsText = '检测不到人'
         }
         if (faceData.faceInfo.length > 1) {
          this.tipsText = '请保证只有一个人'
         } else {
          const {
           pitch,
           roll,
           yaw
          } = face.angleArray;
          const standard = 0.5
          if (Math.abs(pitch) >= standard || Math.abs(roll) >= standard ||
           Math.abs(yaw) >= standard) {
           this.tipsText = '请平视摄像头'
          } else if (face.confArray.global <= 0.8 || face.confArray.leftEye <=
           0.8 || face.confArray.mouth <= 0.8 || face.confArray.nose <= 0.8 ||
           face.confArray.rightEye <= 0.8) {
           this.tipsText = '请勿遮挡五官'
          } else {
           this.tipsText = '请拍照'
           // 这里可以写自己的逻辑了
           this.handleTakePhotoClick()
          }
         }
        },
        fail: (err) => {
         if (err.x == -1 || err.y == -1) {
          this.tipsText = '检测不到人'
         } else {
          console.log(err)
          this.tipsText = err.errMsg || '网络错误，请退出页面重试'
         }
        },
       })
      })
     console.log('启动监听')
      // 5、开始监听帧数据
      listener.start()
     // #endif
    },
    handleTakePhotoClick() { // 拍照点击
     console.log("拍照点击")
     this.cameraEngine.takePhoto({
      quality: "high",
      success: ({
       tempImagePath
      }) => {
       console.log("拍照点击success")
       this.handleOkClick(tempImagePath)
      }
     })
    },
    async handleOkClick(filePath) {  // 点击确定上传
     Tips.loading("认证中……")
     pathToBase64(filePath).then(data => {
      console.log("人脸认证：",data)
      this.personVerifyForm.image = data.split(",")[1]
      this.$http.post('front/cus/face/personVerify',this.personVerifyForm).then(res=>{
       console.log("res::",res)
       Tips.loaded()
       if(res.data.success&&res.data.result.passed=='1'){
        this.personVerifyForm = res.data.result
        Tips.toast("认证通过")
        uni.$emit('personVerify',this.personVerifyForm);
        uni.navigateBack({
         delta: 1
        });
       }else {
        Tips.toast("认证失败,请重试")
        uni.navigateBack({
         delta: 1
        });
       }
      }).catch(function () {
       Tips.toast("网络错误")
       uni.navigateBack({
        delta: 1
       });
      }).finally(function () {
       Tips.loaded()
      })
     })
    }
   }
  }
</script>

<style lang="scss">
  page {height: 100%;width: 100%;}
  .page-content {
   width: 100%;height: 100%;
   .containerV {
    width: 100%;height: 100%;display: flex;flex-direction: column;
    /* 标题 */
    .headerV {
     padding: 163rpx 0 56rpx;text-align: center;
     .top-tips1 {color: #333333;font-size: 42rpx;}
    }
    /* 拍摄区域 */
    .contentV {
     position: relative;display: flex;flex-direction: column;align-items: center;justify-content: center;
     width: 564rpx;height: 564rpx;border-radius: 50%;margin: 0 auto;border: 10rpx solid #1568E0;background-color: #d8d8d8;
     .camera {width: 100%;height: 100%;border-radius: 50%;z-index: 2;}
     .mark {position: absolute;left: 0;top: 0;z-index: 1;width: 100%;height: 100%;border-radius: 50%;}
     .image {position: absolute;width: 100%;height: 100%;z-index: 3;border-radius: 50%;}
    }

    /* 操作按钮 */
    .footerV {
     width: 100%;flex-grow: 1;display: flex;flex-direction: row;align-items: center;justify-content: center;
     .privacyV {
      padding-top: 30rpx;display: flex;flex-direction: row;align-items: center;justify-content: center;
      .text {
       font-size: 30rpx;color: #1C1C1C;text-align: center;line-height: 42rpx;margin-left: 15rpx;
       text {font-size: 30rpx;color: #00AAFF;text-align: center;line-height: 42rpx;}
      }
     }
     .bottom-tips-2 {margin-top: 20rpx;color: #999999;text-align: center;font-size: 26rpx;}

     .take-photo-bgV {
      width: 100%;margin-top: 30rpx;display: flex;flex-direction: row;align-items: center;justify-content: center;
      // 由于左边没有按钮，所以左边要便宜更大，以便是拍照按钮居中
      .btn-take-photo {margin: 0rpx 80rpx 0rpx 80rpx;width: 196rpx;height: 196rpx;background: url("https://www.hujinqiang.com/anjiantong/face/photo.png") no-repeat;background-size: 100% auto;}
      .btn-change-upload {left: 130rpx;width: 80rpx;height: 80rpx;background: url("https://www.hujinqiang.com/anjiantong/face/album.png") no-repeat;background-size: 100% auto;}
      .btn-change-camera {right: 130rpx;width: 80rpx;height: 80rpx;background: url("https://www.hujinqiang.com/anjiantong/face/changing.png") no-repeat;background-size: 100% auto;}
     }
     .confirmV {
      margin: 200rpx 100rpx 0rpx 100rpx;display: flex;flex-direction: row;align-items: center;justify-content: space-between;
      .btn-cancel {font-size: 32rpx;color: #1C1C1C;}
      .btn-ok {font-size: 32rpx;color: #00AAFF;}
     }
    }
   }
  }
</style>