<!DOCTYPE html>
<html>
<head>
<meta charset="UTF8">
</head>
<body>
<div id="contentHolder">
<video id="video" width="320" height="320" autoplay></video>
<button id="camera">拍照</button>
<canvas id="canvas" width="320" height="320">
</canvas>
</div>
<script type="text/javascript">
var video = document.getElementById('video');
var track;
var Camera= document.getElementById('camera');
window.addEventListener("DOMContentLoaded", function(){
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
if (navigator.getUserMedia) {
navigator.getUserMedia({video:true},
function(stream) {
track = stream.getTracks()[0]; // 通过这个关闭摄像头
video.src = window.URL.createObjectURL(stream);
video.onloadedmetadata = function(e) {
video.play();
};
},
function(err) {
alert(err.name);
}
);
}
});
Camera.onclick = function(){
var canvas = document.getElementById('canvas');
var context2D = canvas.getContext("2d");
context2D.fillStyle = "#ffffff";
context2D.fillRect(0, 0, 320, 320);
context2D.drawImage(video, 0, 0, 320, 320);
var image_code =canvas.toDataURL("image/png");//要传给后台的base64
console.log(image_code)
if (null != track) {
track.stop();//关闭摄像头
}
};
</script>
</body>
</html>
上段代码会在打开网页的时候就会调用摄像头
传给后台的是个base64码
下面是我用vue传给后台的代码
var param = {
file:image_code2
}
var a = JSON.stringify(param);
uploadimg(a).then((res) => {
console.log(res);
});
下面是我的php后台接收代码
public function uploadImg($name="img",$path='img'){
$_POST = json_decode(file_get_contents('php://input'),true);
$param = $_POST;
$image_code = $param['file'];
$img = str_replace('data:image/png;base64,', '', $image_code);//获取base64码
$img = str_replace(' ', '+', $img);
$data = base64_decode($img);
$name = time().".png";
$savepath = "./upload/".$name;//将图片存到的位置
file_put_contents($savepath,$data);//将内容写入文件
$this->ajaxReturn(array('status'=>'0','data'=>$savepath));
}
如果想点击触发 打开摄像头可以将camera中代码取出放在一个方法中即可
var Camera= document.getElementById('camera');
window.addEventListener("DOMContentLoaded", function(){
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
});
function demo(){
if (navigator.getUserMedia) {
navigator.getUserMedia({video:true},
function(stream) {
track = stream.getTracks()[0]; // 通过这个关闭摄像头
video.src = window.URL.createObjectURL(stream);
video.onloadedmetadata = function(e) {
video.play();
};
},
function(err) {
alert(err.name);
}
);
}
}
