text: //
  //  NSString+LTSafe.h
  //  RedMaple
  //
  //  Created by 洪峰 on 2018/9/4.
  //  Copyright © 2018年 洪峰. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSString (LTSafe)
  
  - (long)longValue;
  - (NSNumber *)numberValue;
  
  @end
  