How to get row data in fnServerData of data table

问题

I am using ajax datatable as below

$(document).ready(function() {
    var table =  $('#table').dataTable( {
        "iDisplayLength": 10,
        "processing": true,
        "serverSide": true,
        "bStateSave": true,
        "bDeferRender" : true,
        "sAjaxSource": { "url":"<?php echo base_url()?>",

        "type": "GET",
        "orderClasses" : false
      },
        "fnCreatedRow": function( nRow, aData, iDataIndex ) 
        {

        },
        "fnServerData": function (sSource, aoData, fnCallback) {

            $.getJSON(sSource, aoData, function (json) {

                fnCallback(json);
            });
        },

   } );
});

data loads in table but now on next request I want to send last row details back to server.I can send data in fnServerData But I am not able to access last record inserted in table as it is dynamically rendered. I tried using

$('#table tr:last td:last').html()

in fnServerData its blank. How I can get this data in fnServerData

来源：https://stackoverflow.com/questions/55708529/how-to-get-row-data-in-fnserverdata-of-data-table