引入文件
`<script src="../script/jquery-weui/lib/jquery.qrcode.min.js"></script>`
示例：
```
<div id="qrcode"></div>
<script>
jQuery(function(){
jQuery('#qrcode').qrcode({
width: 200,
height: 200,
render: "canvas",
text: "http://www.baidu.com"
});
});
</script>
```