拍照草稿

最新推荐文章于 2025-06-25 14:11:18 发布

JYX8

最新推荐文章于 2025-06-25 14:11:18 发布

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分类专栏： html5 canvas javascript

本文链接：https://blog.youkuaiyun.com/J_Y_X_8/article/details/53128738

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<!DOCTYPE HTML> 
<html> 
<head> 
<meta charset="utf-8"> 
<title>拍照</title> 
<meta name="Keywords" content=""> 
<meta name="Description" content=""> 
<style type="text/css">
    .videoArea{
    width: 320px;
    height: 320px;
    border: 1px solid #ccc; 
}
.can{
    width: 320px;
    height: 320px;
    border: 1px solid #ccc; 
}
.btn{
    width: 71px;
    height:30px;
    line-height: 28px;
}

</style>
</head> 
<body> 
    <div class="block"> 
        <video id="video" class="videoArea" autoplay></video>       
        <canvas id="canvas" class="can none"></canvas>
        <button type="button" class="btn" id="getPic">拍照</button>
    </div>
<script type="text/javascript">
    var canvas = document.getElementById("canvas");
    var cContext = canvas.getContext("2d");
    var video = document.getElementById("video");
    canvas.crossOrigin='anonymous';

    if ( navigator.getUserMedia ){
        navigator.getUserMedia({video:true}, function(stem){
            video.src = stem;
            video.play();
        }, function(error){
            alert(error);
        });
    }else if( navigator.webkitGetUserMedia ){
        navigator.webkitGetUserMedia({video:true}, function(stem){
            video.src = window.webkitURL.createObjectURL(stem);
            video.play();
        }, function(error){
            alert(error);
        });
    }

    document.getElementById("getPic").addEventListener("click", function(e){
        cContext.drawImage(video,0,0,300,80);       
        var imgData = canvas.toDataURL("image/png");
        var base64Data = imgData.substr(22);
    });
</script> 
</body> 
</html>