HTML5打开手机扫码功能及优缺点

    <script src="lib/zepto.js"></script>    <script src="lib/qrcode.lib.min.js"></script>    <script src="lib/qrcode.js"></script>

 <div>        <div class="qr-btn" node-type="qr-btn">扫描二维码1            <input node-type="jsbridge" type="file" name="myPhoto" value="扫描二维码1" />        </div>    </div>

input[node-type=jsbridge]{    display:none;}

 //初始化扫描二维码按钮，传入自定义的 node-type 属性    $(function() {        Qrcode.init($('[node-type=qr-btn]'));    });

(function($) {    var Qrcode = function(tempBtn) {        var _this_ = this;        var isWeiboWebView = /__weibo__/.test(navigator.userAgent);        if (isWeiboWebView) {            if (window.WeiboJSBridge) {                _this_.bridgeReady(tempBtn);            } else {                document.addEventListener('WeiboJSBridgeReady', function() {                    _this_.bridgeReady(tempBtn);                });            }        } else {            _this_.nativeReady(tempBtn);        }    };    Qrcode.prototype = {        nativeReady: function(tempBtn) {            $('[node-type=jsbridge]',tempBtn).on('click',function(e){                e.stopPropagation();            });            $(tempBtn).bind('click',function(e){                $(this).find('input[node-type=jsbridge]').trigger('click');            });            $(tempBtn).bind('change', this.getImgFile);        },        bridgeReady: function(tempBtn) {            $(tempBtn).bind('click', this.weiBoBridge);        },        weiBoBridge: function() {            window.WeiboJSBridge.invoke('scanQRCode', null, function(params) {                //得到扫码的结果                $('.result-qrcode').append(params.result + '<br/>');            });        },        getImgFile: function() {            var _this_ = this;            var inputDom = $(this).find('input[node-type=jsbridge]');            var imgFile = inputDom[0].files;            var oFile = imgFile[0];            var oFReader = new FileReader();            var rFilter = /^(?:image//bmp|image//cis/-cod|image//gif|image//ief|image//jpeg|image//jpeg|image//jpeg|image//pipeg|image//png|image//svg/+xml|image//tiff|image//x/-cmu/-raster|image//x/-cmx|image//x/-icon|image//x/-portable/-anymap|image//x/-portable/-bitmap|image//x/-portable/-graymap|image//x/-portable/-pixmap|image//x/-rgb|image//x/-xbitmap|image//x/-xpixmap|image//x/-xwindowdump)$/i;            if (imgFile.length === 0) {                return;            }            if (!rFilter.test(oFile.type)) {                alert("选择正确的图片格式!");                return;            }            oFReader.onload = function(oFREvent) {                qrcode.decode(oFREvent.target.result);                qrcode.callback = function(data) {                    //得到扫码的结果                    $('.result-qrcode').append(data + '<br/>');                };            };            oFReader.readAsDataURL(oFile);        },        destory: function() {            $(tempBtn).off('click');        }    };    Qrcode.init = function(tempBtn) {        var _this_ = this;        tempBtn.each(function() {            new _this_($(this));        });    };    window.Qrcode = Qrcode;})(window.Zepto ? Zepto : jQuery);