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index.html 6.5 KB
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="style.css" rel="stylesheet" type="text/css" />
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    <script src="https://unpkg.com/vue@2.6.14/dist/vue.js"></script>
    <title>面部照片收集</title>
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</head>
<body>
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    <div id="app">
        <div class="publish">
            <div class="title center">面部照片收集</div>
            <div class="user">
                <div class="user_box">
                    <video width="251" height="361" id="video" ref="video" playsinline webkit-playsinline></video>
                    <canvas style="display: none" width="251" height="361" id="canvasCamera"></canvas>

                </div>
            </div>
            <div @click="setImage" class="submit d_btn center">确认采集</div>
        </div>
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    </div>
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    <script>
        (function (doc, win) {
            var docEl = doc.documentElement,
                resizeEvt =
                    "orientationchange" in window ? "orientationchange" : "resize",
                recalc = function () {
                    var clientWidth = docEl.clientWidth;
                    // if(clientWidth > 1024 ){
                    //   clientWidth = 375
                    // }
                    if (!clientWidth) return;
                    docEl.style.fontSize = 100 * (clientWidth / 750) + "px";
                };
            if (!doc.addEventListener) return;
            win.addEventListener(resizeEvt, recalc, false);
            recalc();
        })(document, window);
        // 新建一个Vue对象
        const vm = new Vue({
            // el是element的缩写，#app是id选择器
            el: '#app',
            // 页面使用的变量需要在data中注册（定义）
            data: {
                mediaStreamTrack: {},
                video_stream: "", // 视频stream
                imgSrc: "", // 拍照图片
                canvas: null,
                context: null,
                err: "",
                streamIns: "",
                URL: "",
            },
            created() {
            },
            mounted() {
                // 进入页面 自动调用摄像头
                this.getUserMedia(
                    {
                        //摄像头拍摄的区域
                        video: {
                            // width: { min: 640, ideal: 1920, max: 1920 },
                            // height: { min: 640, ideal: 1330 },
                            width: { min: 420, ideal: 500, max: 1920 },
                            height: { min: 420, ideal: 1920 },
                            facingMode: "user",
                        },
                        audio: false
                    },

                    this.success,

                    this.error
                );
            },
            methods: {
                success(stream) {
                    this.streamIns = stream;
                    const video = document.getElementById("video"); // webkit内核浏览器

                    this.URL = window.URL || window.webkitURL;

                    if ("srcObject" in video) {
                        video.srcObject = stream;
                    } else {
                        video.src = this.URL.createObjectURL(stream);
                    } // 苹果手机的系统弹框会阻止js的线程的继续执行 手动0.1秒之后自动执行代码

                    setTimeout(() => {
                        video.play();
                    }, 100);
                },

                error(e) {
                    console.log(e);
                    this.scanTip = "访问用户媒体失败";
                },
                getUserMedia(constrains, success, error) {
                    const supported = navigator.mediaDevices.getSupportedConstraints();
                    this.canvas = document.getElementById("canvasCamera");
                    this.context = this.canvas.getContext("2d");
                    if (navigator.mediaDevices === undefined) {
                        navigator.mediaDevices = {};
                    }
                    if (navigator.mediaDevices.getUserMedia) {
                        //最新标准API
                        navigator.mediaDevices
                            .getUserMedia(constrains)
                            .then(success)
                            .catch(error);
                    } else if (navigator.webkitGetUserMedia) {
                        //webkit内核浏览器
                        navigator.webkitGetUserMedia(constrains).then(success).catch(error);
                    } else if (navigator.mozGetUserMedia) {
                        //Firefox浏览器
                        navigator.mozGetUserMedia(constrains).then(success).catch(error);
                    } else if (navigator.getUserMedia) {
                        //旧版API
                        navigator.getUserMedia(constrains).then(success).catch(error);
                    } else {
                        this.scanTip = "你的浏览器不支持访问用户媒体设备";
                    }
                },
                // 拍照 绘制图片
                setImage() {
                    // 点击canvas画图
                    this.context.drawImage(this.$refs.video, 0, 0, 251, 361);
                    console.log("拍照", this.context.drawImage);
                    // 获取图片base64链接 canvas
                    this.canvas.style.display = "block";
                    console.log(this.canvas, "拍照 image ", this.canvas.style);
                    const image = this.canvas.toDataURL("image/png");

                    this.imgSrc = image;
                    console.log(this.imgSrc, "拍照 image ", image);
                    if (this.imgSrc) {
                        this.showPhoto = true;
                    }
                    //   this.$emit("refreshDataList", this.imgSrc);
                },
                dataURLtoFile(dataurl, filename) {
                    var arr = dataurl.split(",");
                    var mime = arr[0].match(/:(.*?);/)[1];
                    var bstr = atob(arr[1]);
                    var n = bstr.length;
                    var u8arr = new Uint8Array(n);
                    while (n--) {
                        u8arr[n] = bstr.charCodeAt(n);
                    }
                    return new File([u8arr], filename, { type: mime });
                },

            },
        })
    </script>
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</body>
</html>