mui:html5中对二维码,以及条形码扫描控件

来源:互联网 发布:重庆链家端口费怎么算 编辑:程序博客网 时间:2024/06/14 05:52

这个识别,plus.barcode来实现扫描,当然这是html app会有加载延迟的问题,如果将这个页面作为跳转页面,会有可能产生控件位置不对的问题,这样,我的解决方案是预加载,
例如这样:

    mui.init({            preloadPages: [{                url: 'scan.html',                id: 'scan.html'            }]        });
<!doctype html>  <html>     <head>      <meta charset="UTF-8">      <title></title>      <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />      <script src="../../js/mui.min.js"></script>    <link href="../../css/mui.min.css" rel="stylesheet" />    <style type="text/css">          #bcid{              width: 100%;              height: 86%;              margin-top: 45px;            position: absolute;              background: #000000;          }          .fbt{              color: #0E76E1;              width: 50%;              background-color: #ffffff;              float: left;               line-height: 44px;              text-align: center;          }      </style>     </head>    <body>      <header class="mui-bar mui-bar-nav" style="background-color: #ffffff;">        <a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>        <h1 class="mui-title" style="color: #0E76E1;">物品二维码扫描</h1>        <span class="mui-icon mui-icon-spinner-cycle mui-spin mui-pull-right" id="turnTheLight"></span>      </header>      <div id="bcid">              <!--盛放扫描控件的div-->              </div>      <div class="mui-bar mui-bar-footer" style="padding: 0px;">          <div class="fbt" onclick="scanPicture();">从相册选择二维码</div>          <div class="fbt mui-action-back">取  消</div>      </div>      <script type="text/javascript">             scan = null;//扫描对象          mui.plusReady(function () {                mui.init();            startRecognize();             });          function startRecognize(){             try{                var filter;               //自定义的扫描控件样式               var styles = {frameColor: "#29E52C",scanbarColor: "#29E52C",background: ""}              //扫描控件构造              scan = new plus.barcode.Barcode('bcid',filter,styles);              scan.onmarked = onmarked;               scan.onerror = onerror;              scan.start();              //打开关闭闪光灯处理              var flag = false;              document.getElementById("turnTheLight").addEventListener('tap',function(){                 if(flag == false){                    scan.setFlash(true);                    flag = true;                 }else{                   scan.setFlash(false);                   flag = false;                 }              });            }catch(e){              alert("出现错误啦:\n"+e);               }            };              function onerror(e){                      alert(e);              };              function onmarked( type, result ) {                      var text = '';                      switch(type){                          case plus.barcode.QR:                          text = 'QR: ';                          break;                          case plus.barcode.EAN13:                          text = 'EAN13: ';                          break;                          case plus.barcode.EAN8:                          text = 'EAN8: ';                          break;                      }                      alert( text + " : "+ result );              };            // 从相册中选择二维码图片           function scanPicture() {              plus.gallery.pick(function(path){                  plus.barcode.scan(path,onmarked,function(error){                      plus.nativeUI.alert( "无法识别此图片" );                  });              },function(err){                  plus.nativeUI.alert("Failed: "+err.message);              });          }                 </script>      </body>  </html>