通过jquery-ui中的sortable来实现拖拽排序

1.引入文件

<script src="{sh::PUB}js/jquery-1.10.1.min.js"></script>
<link rel="stylesheet" href="Public/css/jquery-ui.min.css">
<script src="{sh::PUB}js/jquery-ui.min.js"></script>

2.给元素附上sortable类

<tbody class="sortable">
   <tr></tr>
   <tr></tr>
</tbody>

3.开启并配置

$(function() {
    $(".sortable").sortable({
        cursor: "move",
        items: "tr", //只是tr可以拖动
        opacity: 0.6, //拖动时，透明度为0.6
        revert: true, //释放时，增加动画
        update: function(event, ui) { //更新排序之后
            var categoryids = $(this).sortable("toArray");
            var $this = $(this);
            $.ajax({
                url: '{sh::U("AgentGoods/ajax","todo=categoryDragsort")}',
                type: 'POST',
                data: 'categoryids=' + categoryids,
                success: function(json) {
                    if (json == 1) {
                        layer.msg('移动成功', {
                            icon: 1
                        });
                    } else {
                        $this.sortable("cancel");
                        layer.msg('移动失败', {
                            icon: 2
                        });
                    }
                }
            });
        }
    });
    $(".sortable").disableSelection();
});

4.后台处理

$categoryids    = $this->_post('categoryids');
$categoryidsArr = explode(",",$categoryids);
foreach ($categoryidsArr as $k => $v) {
    $data['sort'] = count($categoryidsArr) - $k;
    $data['id']   = $v;
    M('Agentgoods_category')->where(array('id'=>$v))->save($data);
}
exit('1');

小结：这种排序，不是交换，而是彻底的整体调整