public function updateImg()
 {
     $id = I('post.id');
     // 获取原有图片
     $img = I('post.img');
     // 判断 $_FILES
     if (!empty($_FILES)) {
         $upload = new ImageUploadController();
         $image = $upload->imageUploadOne($_FILES);
     } else {
         $image = '';
     }
     $data = array('id' => $id, 'image' => $image);
     $res = D('Auth')->save($data);
     if ($res) {
         // 回收原有图片
         $recycle = new ImageUploadController();
         $recycle->recycle($img);
     }
     $mess = new MessController();
     $mess->message($res, '修改成功', '修改失败', U('Auth/index', array('mess' => '修改成功')));
 }
 public function delete()
 {
     $id = I('get.id');
     $img = D('Auth')->where(array('id' => $id))->getField('image');
     $res = D('BusinessLogic')->delete($id);
     if ($res) {
         $recycle = new ImageUploadController();
         $recycle->recycle($img);
     }
     $mess = new MessController();
     $mess->message($res, '删除成功', '删除失败', U('BusinessLogic/index', array('mess' => '删除成功')));
 }