标签:print ima rect his html5 text 技术分享 app pat
QRCode.js 是一个用于生成二维码的 JavaScript 库。主要是通过获取 DOM 的标签,再通过 HTML5 Canvas 绘制而成,不依赖任何库。
<div id="qrcode"></div>
<script type="text/javascript">
new QRCode(document.getElementById("qrcode"), "http://www.runoob.com"); // 设置要生成二维码的链接
</script>
或者使用一些可选参数设置:
var qrcode = new QRCode("test", {
text: "http://www.runoob.com",
width: 128,
height: 128,
colorDark : "#000000",
colorLight : "#ffffff",
correctLevel : QRCode.CorrectLevel.H
});
同样我们可以使用以下方法:
qrcode.clear(); // 清除代码
qrcode.makeCode("http://www.w3cschool.cc"); // 生成另外一个二维码
支持该库的浏览器有:IE6~10, Chrome, Firefox, Safari, Opera, Mobile Safari, Android, Windows Mobile, 等。
示例:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta content="yes" name="apple-mobile-web-app-capable"> <meta content="yes" name="apple-touch-fullscreen"> <meta content="telephone=no,email=no" name="format-detection"> <meta name="App-Config" content="fullscreen=yes,useHistoryState=yes,transition=yes"> <title>二维码</title> </head> <body> <div class="wrapper"> <textarea id="txtContent" cols="50" rows="5"></textarea> <button type="button" onclick="getCode();">生成</button> <div id="qrCode"></div> <script type="text/javascript" src="http://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script> <script type="text/javascript" src="http://static.runoob.com/assets/qrcode/qrcode.min.js"></script> <script type="text/javascript"> var qrCode = document.getElementById("qrCode"); var txtContent = document.getElementById("txtContent"); var qrcode=new QRCode(qrCode,{ width:300, height:300, correctLevel:QRCode.CorrectLevel.L }); function getCode() { qrcode.makeCode(txtContent.value); } </script> </body> </html>
结果:
标签:print ima rect his html5 text 技术分享 app pat
原文地址:https://www.cnblogs.com/chen-cheng/p/9223551.html