text: //
  //  AppDelegate.h
  //  HLMineSweeper
  //
  //  Created by Hao Liu on 7/19/15.
  //  Copyright (c) 2015 Hao Liu. All rights reserved.
  //
  
  
  @interface AppDelegate : UIResponder <UIApplicationDelegate>
  
  @property (nonatomic, strong, readwrite) UIWindow *window;
  @property (nonatomic, strong, readwrite) UINavigationController *navigationController;
  
  + (AppDelegate *)appDelegate;
  
  @end
  
  