Jquery Autocomplete renderItem在1.12.1版本中不起作用

我对JQuery Autocompete renderItem有问题。我的自动完成功能很好,但似乎 .data("ui-autocomplete")._renderItem 在接收到数据后未被调用。我在运行脚本时没有收到任何错误。我试着 console.log("success"); 但它也不运行。我错过什么了吗?jquery ui上的版本是1.12.1。任何帮助都将不胜感激!

html:

<td class="itemCodeHd"><input class="itemCode" name="ItemCode[]" <?php echo "value='$ItemCode'"?> <?php echo "id= ItemCodeItem" . $l;?> ></td>
<td class="itemDescriptionSalesHd"><textarea class="itemDescriptionSales"  name="ItemDescriptionSales[]"  <?php echo "id= ItemDescriptionSalesItem" . $l;?> rows="1"  tabindex="2"><?php echo "$ItemDescriptionSales"?></textarea></td>

JSON:

[{"itemCode":"001","itemDescriptionSales":"Item 1"},
{"itemCode":"002","itemDescriptionSales":"Item 2"},
{"itemCode":"003","itemDescriptionSales":"Item 1"}]

Jquery:

$( function() {


 $( ".itemCode" ).autocomplete({
  source: function( request, response ) {
    $.ajax( {
      url: "item-search.php",
      dataType: "json",
      data: {
        term: request.term
      },
      success: function( data ) {
        response( data );
      }
    } );
 },
 minLength: 3,
  select: function( event, ui ) {
      $(this).parent().siblings().children(".itemDescriptionSales").val(ui.item.itemDescriptionSales);

   }    

}).data("ui-autocomplete")._renderItem = function (ul, item) {
   console.log("success");
          return $('<li>')
          .data( "ui-autocomplete-item", item )
          .append( "<a>" + item.itemCode + "<br>" + item.itemDescriptionSales + "</a>" )
          .appendTo( ul );


      };

  } );