三、實現 代碼<!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" /> <link href="CSS/mui.min.css" rel="stylesheet" /> <script src="js/mui.min.js"></script> <style type="text/css"> #bcid{ width: 100%; height: 100%; position: absolute; background: #000000; } html, body ,div{ height:100%; width: 100%; } .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;">物品二維碼掃描</h1> <span class="mui-icon mui-icon-spinner-cycle mui-spin mui-pull-right" id="turnTheLight"></span> </header> <div id="bcid"> <!--盛放掃描控件的div--> </div> <div class="mui-bar mui-bar-footer" style="padding: 0px;"> <div class="fbt" onclick="scanPicture();">從相冊選擇二維碼</div> <div class="fbt mui-action-back">取 消</div> </div> <script type="text/javascript"> scan = null;//掃描對象 mui.plusReady(function () { mui.init(); startRecognize(); }); function startRecognize(){ try{ var filter; //自定義的掃描控件樣式 var styles = {frameColor: "#29E52C",scanbarColor: "#29E52C",background: ""} //掃描控件構造 scan = new plus.barcode.Barcode('bcid',filter,styles); scan.onmarked = onmarked; scan.onerror = onerror; scan.start(); //打開關閉閃光燈處理 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("出現錯誤啦:/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 ); }; // 從相冊中選擇二維碼圖片 function scanPicture() { plus.gallery.pick(function(path){ plus.barcode.scan(path,onmarked,function(error){ plus.nativeUI.alert( "無法識別此圖片" ); }); },function(err){ plus.nativeUI.alert("Failed: "+err.message); }); } </script> </body></html>三、做的過程中遇見的問題 a，div占滿整個頁面 1，此div寬高都為100%，父級元素的高度也為此(依次類推直至根節點)，或者此div的position為absolute; 2，可采用js動態設置頁面寬高var height = window.innerHeight + 'px';//獲取頁面實際高度var width = window.innerWidth + 'px';document.getElementById("bcid").style.height= height;document.getElementById("bcid").style.width= width; b,掃描控件有上下邊距采用填充黑色來淡化視覺上面的差異，未實際解決，（如果你解決的話，歡迎留言，謝謝）
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