数据表导出PDF不起作用<br/> html标签tfoot

Question

首先，我的主要目的是在某些列总和显示页脚区域中添加并增加透明度。所以我习惯了页脚回调函数。好的，这里没有问题。然后使用pdf按钮导出数据表信息。 İt可以正常工作并在浏览器上完美显示，但是当我导出pdf时，不要工作
HTML标记不正确。

我该怎么办？出问题了...

下面的我的脚号代码
标签不起作用，并显示内联和导出的pdf文件脚。

$( $this.api().column( 10 ).footer()).empty();
                _.each(oIT, function(v, i){
                    var txt = "<span style='display:block; font-size:14px;'>" + v + "</span> <br/>";
                    $( $this.api().column( 10 ).footer()).append(txt);    
                });

我想在与下面相同的pdf脚区域上显示

159,954.12
$ 1,654.00
£500.00
€111.00

下面的我的js代码

<script>
$(document).ready(function() {
    var table = $('#example').dataTable({

        footerCallback: function(row, data, start, end, display){

            var $this   = this;


            // Important to convert number in float
            var convertFloat = function(num) {
                var value = typeof num === 'string' ? num.replace(/[\$,]/g, '.') : typeof num === 'number' ? num : 0;
                return Number(value);
            }

            var moneyFormat = function(num, c){
                var p = num.toFixed(2).split(".");
                return c + p[0].split("").reverse().reduce(function(acc, num, i, orig) {
                    return  num=="-" ? acc : num + (i && !(i % 3) ? "," : "") + acc;
                }, "") + "." + p[1];
            }

            var totalFunction = function(current){
                var api         = $this.api();
                var r           = api.column(9, {page: current}).data();
                var ia          = api.column(10, {page: current}).data();
                var c           = api.column(11, {page: current}).data();
                var oR          = [];
                var oI          = [];
                var oRT         = [];
                var oIT         = [];


                _.each(r, function(v, i){
                    oR.push({
                        value: v,
                        currency: c[i]
                    });

                    oI.push({
                        value: ia[i],
                        currency: c[i]
                    });
                });


                //############### Rez Functions ###############
                var gOR = _.groupBy(oR, 'currency');

                var i = 0;
                _.each(gOR, function(value, index){
                    var total = value.reduce(function(a, b){
                        return convertFloat(a) + convertFloat(b.value);
                    }, 0);

                    oRT[i] = moneyFormat(total, index);
                    i++;
                });

                // Rez tutar column
                $( $this.api().column( 9 ).footer()).empty();
                _.each(oRT, function(v, i){
                    var txt = "<span style='display:block; font-size:14px;'>" + v + "</span> <br>";
                    $( $this.api().column( 9 ).footer()).append(txt);    
                });
                //################# End Rez Functions ##############

                //########## Iade Functions ############
                var gOI = _.groupBy(oI, 'currency');

                var y = 0;
                _.each(gOI, function(value, index){
                    var total = value.reduce(function(a, b){
                        return convertFloat(a) + convertFloat(b.value);
                    }, 0);

                    oIT[y] = moneyFormat(total, index);
                    y++;
                });

                // Iade tutar column
                $( $this.api().column( 10 ).footer()).empty();
                _.each(oIT, function(v, i){
                    var txt = "<span style='display:block; font-size:14px;'>" + v + "</span> <br/>";
                    $( $this.api().column( 10 ).footer()).append(txt);    
                });

                //########## End Iade Functions ###########
            }
            var current = false;

            // Initialize the functions
            totalFunction(current);

            $(".dataTables_filter .input-sm").on('input', function(){
                var input = $(this).val();

                if(input == ""){
                    current = false;
                }else{
                    current = 'current';
                }

                totalFunction(current);
            });

        },



            dom: 'Bfrtip',
                buttons: [

                {
                    extend: 'colvis',
                    text: 'Kolonlar'
                },
                {
                    extend: 'excelHtml5',
                    text: 'EXCEL',
                    filename: 'Iade_Liste',
                    orientation: 'landscape',
                    pageSize: 'LEGAL',
                    footer: true,
                    exportOptions: {
                    columns: ':visible',
                    stripNewlines:"\n", 
                    stripHtml:true,
                    }
                },
                {
                    extend: 'pdfHtml5',
                    text: 'PDF',
                    filename: 'Iade_Liste',
                    orientation: 'landscape',
                    pageSize: 'A4',
                    footer: true,
                    exportOptions: {
                    columns: ':visible'
                    }
                },


            ],


        processing: false,
        serverSide: false,
        ajax: 'server.php',
        paging: true
    } );

} );

</script>