text: //
  //  NSNull+CHTNullSafe.h
  //  CHTGithub
  //
  //  Created by cht on 17/1/6.
  //  Copyright © 2017年 cht. All rights reserved.
  //
  
  //reference:https://github.com/nicklockwood/NullSafe
  //reference:http://blog.csdn.net/devday/article/details/7418022
  
  
  /**
   通过消息转发解决向NSNull发送消息导致Crash，只需将两个文件导入项目中即可
   */
  #import <Foundation/Foundation.h>
  
  @interface NSNull (CHTNullSafe)
  
  
  @end
  