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Detailed explanation of WeChat JS-SDK development scan interface function implementation code

高洛峰Original: 2017-03-22 16:30:474869browse

This article explains in detail the implementation code of the scan interface function developed by WeChat JS-SDK

<?php
    require_once "jssdk.php";
    $appID = "输入你的id";
     $appsecret = "输入你的secret";
 
    $jssdk = new JSSDK($appID, $appsecret);
    $signPackage = $jssdk->GetSignPackage();
var_dump($jssdk);
   
?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title></title>
</head>
<body>
  <input type="text" value="<?php echo $signPackage["appId"]; ?>" id="id1" />
  <input type="text" value="<?php echo $signPackage["timestamp"]; ?>"id="id2" />
  <input type="text" value="<?php echo $signPackage["nonceStr"]; ?>" id="id3" />
  <input type="text" value="<?php echo $signPackage["signature"]; ?>" id="id4" />
</body>
<script src="./jweixin-1.0.0.js"></script>
<script src="./jquery-1.8.3.min.js"></script>
<script>
  // 注意：所有的JS接口只能在公众号绑定的域名下调用，公众号开发者需要先登录微信公众平台进入“公众号设置”的“功能设置”里填写“JS接口安全域名”。 
  // 如果发现在 Android 不能分享自定义内容，请到官网下载最新的包覆盖安装，Android 自定义分享接口需升级至 6.0.2.58 版本及以上。
  // 完整 JS-SDK 文档地址：http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html
  var appId=$(&#39;#id1&#39;).val();
  var timestamp=$(&#39;#id2&#39;).val();
  var nonceStr=$(&#39;#id3&#39;).val();
  var signature=$(&#39;#id4&#39;).val();
  wx.config({
    debug: true,
    appId: appId,
    timestamp: timestamp,
    nonceStr: nonceStr,
    signature: signature,
    jsApiList: 
       // 所有要调用的 API 都要加到这个列表中
       [&#39;scanQRCode&#39;]
     
  });
   wx.ready(function () {
     // 在这里调用 API
     alert(1);
wx.checkJsApi({
    jsApiList: [&#39;chooseImage&#39;], // 需要检测的JS接口列表，所有JS接口列表见附录2,
    success: function(res) {
     alert(res.errMsg);
        // 以键值对的形式返回，可用的api值true，不可用为false
       // {"checkResult":{"chooseImage":true},"errMsg":"checkJsApi:ok"}
    }
});
       wx.scanQRCode({  
     needResult: 0, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，
      scanType: ["qrCode","barCode"], // 可以指定扫二维码还是一维码，默认二者都有
      success: function (res) {
       
          var result = res.resultStr; // 当needResult 为 1 时，扫码返回的结果
      }
      
    })
   });
</script>
</html>

代码放到服务器上后用火狐浏览器打开链接，在火狐浏览器地址栏后面有个二维码的图标，点击后出现二维码图片
用微信扫码二维码，微信中弹出的网页会有返回值。（用微信的浏览器打开）

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