拖放时获取元素在列表中的位置(ui.sortable)

我有一个这样的可排序列表:http://jqueryui.com/demos/sortable

当它被移动时，是否可以获得列表中元素的开始和结束位置?我说的是他们的职位编号，在列表中.

例如，如果我将元素 2 移动到列表中的位置 5，我想将这两个数字分配给变量.

我是 jQuery 新手 - 任何帮助将不胜感激.

解决方案

• 演示: http://so.lucafilosofi.com/getting-the-position-of-the-element-in-a-list-when-its-drag-dropped-ui-sortable/

解决方案:

$(function() {$('ul#sortable').sortable({开始:函数(事件，用户界面){var start_pos = ui.item.index();ui.item.data('start_pos', start_pos);},更新:函数(事件，用户界面){var start_pos = ui.item.data('start_pos');var end_pos = ui.item.index();警报(start_pos + ' - ' + end_pos)；}});});

<块引用>

• 注意:已更新以使用 jQuery data() 在 Alconja
建议下的方法

I have a sortable list like this one: http://jqueryui.com/demos/sortable

Is it possible to get the start and end position of the element in the list, when it has been moved? I'm talking about their position number, in the list.

For example, if I move element 2 to position 5 in the list, I'd like to assign those two numbers to variables.

I'm new to jQuery - any help would be much appreciated.

解决方案

• demo: http://so.lucafilosofi.com/getting-the-position-of-the-element-in-a-list-when-its-drag-dropped-ui-sortable/

SOLUTION:

$(function() {
    $('ul#sortable').sortable({
        start: function(event, ui) {
            var start_pos = ui.item.index();
            ui.item.data('start_pos', start_pos);
        },
        update: function(event, ui) {
            var start_pos = ui.item.data('start_pos');
            var end_pos = ui.item.index();
            alert(start_pos + ' - ' + end_pos);
        }
    });
});

• NOTE: Updated to make use of jQuery data() method under advice of Alconja