text: //
  //  NSNumber+NSNumberAdditions.h
  //  OneDay
  //
  //  Created by Yu Tianhang on 12-11-1.
  //  Copyright (c) 2012年 Kimi Yu. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSNumber (NSNumberAdditions)
  
  - (NSDate *)dateValue;  // since 1970
  @end
  