js自动生成手机扫描二维码就可以实现自动下载apk的二维码

js自动生成手机扫描二维码就可以实现自动下载apk的二维码

代码如下：

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<!DOCTYPE html
  PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko" lang="ko">

<head>
  <title>Javascript 二维码生成库：QRCode</title>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no" />
  <script type="text/javascript" src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
  <script type="text/javascript" src="http://static.runoob.com/assets/qrcode/qrcode.min.js"></script>
</head>

<body>
  <img id="qrCodeIco" src="../../css/img/logo.bmp" style="position: absolute;width: 50px; height: 50px;" />
  <input id="text" type="text" value="http://www.baidu.com" style="width:80%" /><br />
  <div id="qrcode" style="width:100px; height:100px; margin-top:15px;"></div>

  <script type="text/javascript">
    var qrcode = new QRCode(document.getElementById("qrcode"), {
      width: 200,
      height: 200,
      background: "#ffffff",//背景颜色
      foreground: "#000000"  //二维码颜色
    });

    function makeCode() {
      var elText = document.getElementById("text");

      if (!elText.value) {
        alert("Input a text");
        elText.focus();
        return;
      }

      qrcode.makeCode(elText.value);

      $("#qrCodeIco").css("left", "70px");
      $("#qrCodeIco").css("top", "110px");

    }

    makeCode();

    $("#text").
      on("blur", function () {
        makeCode();
      }).
      on("keydown", function (e) {
        if (e.keyCode == 13) {
          makeCode();
        }
      });
  </script>
</body>

</html>