参考了：https://blog.csdn.net/weixin_34100227/article/details/88016462
发布之后要有https协议才能调用成功
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>拍照</title> </head> <body> <div></div> <button id="take">拍照</button> <br /> <video id="v" ></video> <div id="imgList"></div> <!-- <img src="" id="photo" alt=""> --> <canvas id="canvas" style="display:none;"></canvas> <script> !(function () { function takePhotos() { if (videoPlaying) { let canvas = document.getElementById('canvas'); canvas.width = v.videoWidth; canvas.height = v.videoHeight; canvas.getContext('2d').drawImage(v, 0, 0); let data = canvas.toDataURL('image/webp'); //base64 //console.log(data); //保存图片 //document.getElementById('photo').setAttribute('src', data); document.getElementById('imgList').innerHTML += '<img data-pro="img" src="' + data + '" id="photo" alt="" style="70px;height:60px;">'; } } document.onkeydown = function (e) { // 回车提交表单 document.getElementById('take').blur(); // 兼容FF和IE和Opera var theEvent = window.event || e; var code = theEvent.keyCode || theEvent.which || theEvent.charCode; if (code == 13) { takePhotos(); } } // 老的浏览器可能根本没有实现 mediaDevices，所以我们可以先设置一个空的对象 if (navigator.mediaDevices === undefined) { navigator.mediaDevices = {}; } if (navigator.mediaDevices.getUserMedia === undefined) { navigator.mediaDevices.getUserMedia = function (constraints) { // 首先，如果有getUserMedia的话，就获得它 var getUserMedia = navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia; // 一些浏览器根本没实现它 - 那么就返回一个error到promise的reject来保持一个统一的接口 if (!getUserMedia) { return Promise.reject(new Error('getUserMedia is not implemented in this browser')); } // 否则，为老的navigator.getUserMedia方法包裹一个Promise return new Promise(function (resolve, reject) { getUserMedia.call(navigator, constraints, resolve, reject); }); } } const constraints = { video: true, audio: false }; let videoPlaying = false; let v = document.getElementById('v'); let promise = navigator.mediaDevices.getUserMedia(constraints); promise.then(stream => { // 旧的浏览器可能没有srcObject if ("srcObject" in v) { v.srcObject = stream; } else { // 防止再新的浏览器里使用它，应为它已经不再支持了 v.src = window.URL.createObjectURL(stream); } v.onloadedmetadata = function (e) { v.play(); videoPlaying = true; }; }).catch(err => { console.error(err.name + ": " + err.message); }) document.getElementById('take').addEventListener('click', takePhotos, false); })(); </script> </body> </html>