protected function ajaxExecute(MUser $me, MShop $shop)
 {
     $numiid = MRequest::get('iid');
     try {
         $item = $shop->getItem($numiid);
     } catch (Exception $e) {
         return MJsonRespond::respondFail('获取商品列表失败');
     }
     return MJsonRespond::respondSuccess('成功', array('item' => $item->getMain()));
 }