layui上传组件进度条进度不对

使用layui上传组件，发现文件上传进度获取不对

var uploadListIns = upload.render({
elem: '#testList',
elemList: $('#demoList'),
url: './damageImportExcelList',
accept: 'file',
exts: 'xls|xlsx|xlsm|xlt|xltx|xltm',
multiple: true,
auto: false,
bindAction: '#testListAction',
before: function (obj) { //obj参数包含的信息，跟 choose回调完全一致
this.data = {
repeatAction: repeatAction,
};
element.progress('uploadfile', '0%');
loadingIndex = layer.load(); //上传loading
layer.open({
type: 1,
title: "上传进度", //不显示标题
//closeBtn: 0, //不显示关闭按钮
skin: 'layui-layer-demo', //样式类名
area: ['420px', 'auto'], //宽高
content: '

',
success: function (layero, index) {
layer.setTop(layero); //重点2
}
});
// element.render();
},
choose: function (obj) {
var that = this;
var files = this.files = obj.pushFile(); //将每次选择的文件追加到文件队列
//读取本地文件
obj.preview(function (index, file, result) {
var tr = $([''
, '' + file.name + ''
, '' + (file.size / 1014).toFixed(1) + 'kb'
, ''
, '重传'
, '删除'
, ''
, ''].join(''));
//单个重传
tr.find('.demo-reload').on('click', function () {
obj.upload(index, file);
});

            //删除
            tr.find('.demo-delete').on('click', function () {
                delete files[index]; //删除对应的文件
                tr.remove();
                uploadListIns.config.elem.next()[0].value = ''; //清空 input file 值，以免删除后出现同名文件不可选
            });

            that.elemList.append(tr);
            // element.render('progress'); //渲染新加的进度条组件
        });
    },
    done: function (res, index, upload) { //成功的回调
        layer.close(loadingIndex);
        var that = this;
        //if(res.code == 0){ //上传成功
        if (res.success) {
            layer.closeAll('loading');
            // layer.msg(res.message, {
            //     offset: '15px',
            //     icon: 1,
            //     time: 10000
            // })
        } else {
            layer.closeAll('loading');
            // layer.msg('提交失败：' + res.message, {
            //     offset: '15px',
            //     icon: 1,
            //     time: 10000
            // })
        }
        if(res.code == 500) {
            alldonenews = res.message;
        } else if (res.code == 200) {
            alldonenews = res.message;
        };
        var tr = that.elemList.find('tr#upload-' + index)
            , tds = tr.children();
        tds.eq(3).html(''); //清空操作
        delete this.files[index]; //删除文件队列已经上传成功的文件
        return;
        //}
        this.error(index, upload);
        layer.closeAll();
    },
    allDone: function (obj) { //多文件上传完毕后的状态回调
        layer.close(loadingIndex);
        layer.closeAll('loading');
        if (alldonenews === "导入成功！") {
            parent.layer.closeAll();
            parent.layer.msg('导入成功', {time: 10000},);
        } else {
            var op = function () {
                parent.layer.closeAll();
                parent.layer.msg('导入失败', {time: 1000},);
            };
            Feng.confirm(alldonenews, op);

        }

    },
    error: function (index, upload) { //错误回调
        console.log(index)
        layer.close(loadingIndex);
        layer.closeAll('loading');
        var that = this;
        var tr = that.elemList.find('tr#upload-' + index)
            , tds = tr.children();
        tds.eq(3).find('.demo-reload').removeClass('layui-hide'); //显示重传
    },
    progress: function (n, elem, e, index) { //注意：index 参数为 layui 2.6.6 新增
        // var percent = n + '%'; 获取进度百分比
        // $("#uploadfile").attr("lay-percent", percent);
        // element.render();
        element.progress('uploadfile', n + '%');
        //以下系 layui 2.5.6 新增
        console.log(n);
    }
});

打印上传的进度会发现直接到了100