const openFront = ref(true);//true开启前置摄像头，false开启后置摄像头
const video = ref(null);
//开启摄像头function startCamera(){loadingVideo.value = true;// 检测浏览器是否支持mediaDevicesif (navigator.mediaDevices) {let params = {audio: false,video: openFront.value? { facingMode: 'user' } : { facingMode: { exact: "environment" } },// video: { facingMode: { exact: "environment" } },//后置摄像头// video: { facingMode: "user"},//前置摄像头}console.log(params);navigator.mediaDevices// 开启视频.getUserMedia(params).then((stream) => {loadingVideo.value = false;// 将视频流传入viedo控件if (video.value) {video.value.srcObject = stream;video.value.play();}}).catch((error) => {loadingVideo.value = false;console.log(error);if (error.name === 'NotAllowedError' || error.name === 'NotFoundError') {// 用户未授权相机访问或者没有可用设备ElMessage.warning("请允许访问摄像头并确保设备已连接");} else {// 其他错误let cameraName = cameraStatu.value? '前置摄像头' : '后置摄像头';ElMessage.warning('启动'+cameraName+'时出错：' + error.message);}});} else {loadingVideo.value = false;ElMessage.warning("该浏览器不支持开启摄像头，请更换最新版浏览器");}};//关闭摄像头function closeCamera(){if (!video.value.srcObject) return;let stream = video.value.srcObject;let tracks = stream.getTracks();tracks.forEach(track => {track.stop();});video.value.srcObject = null;}//切换摄像头function toggleCamera (){cameraStatu.value = !cameraStatu.value;closeCamera();startCamera();}