public function DeletePicture()
 {
     $ids = array_unique((array) I('ids', null));
     if (empty($ids)) {
         return $this->error('请选择要删除行!');
     }
     $data = array('id' => array('in', $ids));
     $model = new HeadPictureManagementModel();
     $res = $model->where($data)->delete();
     if (!$res) {
         $this->error("删除图片失败");
     } else {
         $this->success('删除成功!', addons_url('WeVote:/HeadPictureManagement/Index', array('action_id' => $this->mActionId)));
     }
 }