protected function ajaxExecute(MUser $me, MShop $shop)
 {
     $num_iid = MRequest::request('iid');
     try {
         DalItem::deleteShopItem($num_iid, $shop->getID());
         Observer::postNotify('item.delete', $num_iid);
     } catch (Exception $e) {
         return MJsonRespond::respondFail('删除失败');
     }
     return MJsonRespond::respondSuccess('成功');
 }