qrcode 生成二维码
Demo：
qrcodeGithub 地址：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>qrcode生成二维码</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../plugins/bootstrap-4.1.3-dist/css/bootstrap.min.css">
<script src="../plugins/echarts/jquery.min.js"></script>
<script src="../plugins/bootstrap-4.1.3-dist/js/bootstrap.min.js"></script>
<script type="text/javascript" src="js/jquery.qrcode.min.js"></script>
</head>
<body>
<div class="alert alert-primary" role="alert" style="text-align: center;margin:10px;">
<b>生成的二维码如下:</b>
</div>
<div id="qrCodeDiv" style="text-align: center; margin:40px;">
<img id="qrCodeIco" src="logo.png" style="position: absolute;width: 64px; height: 64px;" />
</div>
</body>
<script type="text/javascript">
function utf16to8(str) {
var out, i, len, c;
out = "";
len = str.length;
for (i = 0; i < len; i++) {
c = str.charCodeAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out += str.charAt(i);
} else if (c > 0x07FF) {
out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
} else {
out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
}
}
return out;
};
$("#qrCodeDiv").qrcode({
render: "canvas", //渲染方式有table方式（IE兼容）和canvas方式
width: 260, //宽度
height: 260, //高度
text: utf16to8("https://www.cnblogs.com/hglibin/"), //内容
typeNumber: -1, //计算模式
correctLevel: 2, //二维码纠错级别
background: "#ffffff", //背景颜色
foreground: "#000000" //二维码颜色
});
var margin = ($("#qrCodeDiv").height() - $("#qrCodeIco").height()) / 2; //控制Logo图标的位置
$("#qrCodeIco").css("margin", margin);
</script>
</html>
运行结果：