若直接使用此代码请下载qrcode.js代码并引入
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>识别二维码</title>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<style type="text/css">
body {
margin: 0;
}
.module-content {
min-width: 320px;
max-width: 1000px;
width: 100%;
color: #000;
margin: 0 auto;
padding-left: 10px;
box-sizing: border-box;
}
.box h3 {
font-weight: 300;
margin: 0;
font-size: 20px;
height: 60px;
line-height: 60px;
color: #000;
}
.url-box {
height: 30px;
line-height: 30px;
font-size: 14px;
}
#file {
position: absolute;
width: 120px;
height: 120px;
opacity: 0;
top: 0;
left: 0;
overflow: hidden;
z-index: 10;
}
</style>
</head>
<body>
<div class="module-content">
<div class="box">
<div style="position: relative;">
<img style="width: 120px;height: 120px;" src="http://www.jq22.com/demo/jQueryQrcode201709202327/tu.png" />
<input type="file" onchange="getUrl(this,'file-url')" name="" id="file" value="" />
<p class="url-box" id="urlBox"></p>
</div>
</div>
</div>
<script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>
<script src="qrcode.js" type="text/javascript" charset="utf-8"></script>
<script src="code.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
function getUrl(e, param) {
analyticCode.getUrl(param, e, function(url1, url2) {
e.nextElementSibling.innerHTML = url1;
e.previousElementSibling.src = url2;
});
}
!function(){
let getObjectURL = function(file){
let url = null ;
if (window.createObjectURL!=undefined) { // basic
url = window.createObjectURL(file) ;
} else if (window.URL!=undefined) { // mozilla(firefox)
url = window.URL.createObjectURL(file) ;
} else if (window.webkitURL!=undefined) { // webkit or chrome
url = window.webkitURL.createObjectURL(file) ;
}
return url ;
}
window.analyticCode = {
getUrl : function(type,elem,fn){
let url = null,src = null;
if(type === 'img-url'){
url = elem.src;
}else if(type === 'file-url' && elem.files.length > 0){
url = getObjectURL(elem.files[0]);
}
qrcode.decode(url);
qrcode.callback = function(imgMsg){
fn(imgMsg,url);
}
}
}
}()
</script>
</body>
</html>
