Table of Contents
8.2.2 调用微信扫一扫接口
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Home Web Front-end HTML Tutorial 【原创】微信公众号与HTML 5混合模式揭秘4--jssdk调用微信扫一扫_html/css_WEB-ITnose

【原创】微信公众号与HTML 5混合模式揭秘4--jssdk调用微信扫一扫_html/css_WEB-ITnose

Jun 24, 2016 am 11:33 AM

微信公众号与HTML 5混合模式揭秘1——如何部署JSSDK

 微信公众号与HTML 5混合模式揭秘2——分享手机相册中照片

微信公众号与HTML 5混合模式揭秘3——JSSDK获取地理位置

 

在JSSDK中,为开发者提供了一个扫一扫API服务。

还是先创建一份scanQRCode.js文件,为“wxJSSDK”增加“scanQRCode”的相关API,代码如下:

 

01     wxJSSDK.scanQRCode= function(codeApi){02         if(wxJSSDK.isReady){//wxJSSDK.isReady 查看微信JSSDK是否初始化完毕03             if(codeApi){04                 //其他代码略05             }else{06                 console.log("缺少配置参数");07             }08         }else{09             console.log("抱歉,wx没有初始化完毕,请等待wx初始化完毕,再调用扫一扫接口10       服务。");11         }12    13     }
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复制一份JSSDK环境,创建一份index.html文件,结构如图8.2所示。

 

 

 

图8.2    

8.2.2 调用微信扫一扫接口

微信扫一扫的调用相对简单,官方示例代码如下:

 

01     wx.scanQRCode({02         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,03         scanType:["qrCode","barCode"], // 可以指定扫二维码还是一维码,默认二者都有04         success: function (res) {05                    varresult = res.resultStr; // 当needResult 为 1 时,扫码返回的结果06              }07     });
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在scanQRCode.js中,封装“scanQRCode”,如下:

 

01     wxJSSDK.scanQRCode= function(codeApi){02         if(wxJSSDK.isReady){//wxJSSDK.isReady 查看微信JSSDK是否初始化完毕03             if(codeApi){04                 codeApi.scanQRCode && wx.scanQRCode({05                     needResult:codeApi.scanQRCode.needResult, // 默认为0,扫描结果由微06    信处理,1则直接返回扫描结果,07                     scanType:codeApi.scanQRCode.scanType || ["qrCode","barCode"], // 可08         以指定扫二维码还是一维码,默认二者都有09                     success: function (res) {10                         codeApi.scanQRCode.success&&11     codeApi.scanQRCode.success(res);12                     }13                 });14             }else{15                 console.log("缺少配置参数");16             }17         }else{18             console.log("抱歉,wx没有初始化完毕,请等待wx初始化完毕,再调用扫一扫接口19       服务。");20         }21     }
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在index.html文件中,增加“扫一扫”按钮,代码结构,如下:

 

 

01     02     <htmllang>03     04              <metacharset>05         <meta name="viewport" content="width=device-width, initial-scale=1.0,06     minimum-scale=1,maximum-scale=1.0, user-scalable=no">07         <title>第8章 8.2节微信扫一扫</title>08         <!--依赖文件:jQuery-->09         <scriptsrc>10         <!--依赖文件:微信的JSSDK源文件-->11         <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>12         <!--依赖文件:coolie-->13         <scriptsrc>14         <!--JSSDK的环境-->15         <scriptsrc>16         <!--引入检测API的扫一扫服务-->17         <scriptsrc>18         <style>19             input{20                 width: 100%;21                 padding: 0.2em;22                 background-color: #5eb95e;23                 font-size: 1.4em;24                 background-image:linear-gradient(to bottom, #62c462, #57a957);25                 background-repeat: repeat-x;26                 color: #ffffff;27                 text-align: center;28                 text-shadow: 0 -1px 0 rgba(0, 0, 0,0.25);29                 border-radius: 0.3em;30             }31             #info{32                 border-left: 3px solid #03a9f4;33                 background-color: #5eb95e;34                 color: #ffffff;35                 border-radius: 0.3em;36                 text-shadow: 0 -1px 0 rgba(0, 0, 0,0.25);37             }38         </style>39     40     41         <h1 id="">:)</h1>42         <b style="font-size: 3em"> 微信扫一扫接口!</b><br><br>43         <input type="button" value="点击扫一扫" id="scanQRCode"><br><br>44     45     </scriptsrc></scriptsrc></scriptsrc></scriptsrc></metacharset></htmllang>
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