<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>js生成当前页面二维码</title>
</head>
<script type='text/javascript' src='http://cdn.staticfile.org/jquery/2.1.1/jquery.min.js'></script>
<script type="text/javascript" src="http://cdn.staticfile.org/jquery.qrcode/1.0/jquery.qrcode.min.js"></script>
<body>
<div id="qrcode"></div>
<a id="download" download="qrcode.jpg"></a>
<button id="down">下载</button>
<script>
jQuery('#qrcode').qrcode({
width: 180,//宽
height: 180,//高
text: window.location.href
});
$("#down").click(function() {
var canvas = $('#qrcode').find("canvas").get(0);
var url = canvas.toDataURL('image/jpeg');
$("#download").attr('href', url).get(0).click();
return false;
});
</script>
</body>
</html>
