vue pc端拍照上传 vue实现pc端拍照上传功能

时间:2021-09-29 qq_39070698 人气:0

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<!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);
     }
    );
  }  
}

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