text: //
  //  NSString+addition.h
  //  Poker2048
  //
  //  Created by tongleiming on 2019/6/4.
  //  Copyright © 2019 tom555cat. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  @interface NSString (addition)
  
  - (BOOL)xc_isIPv4Address;
  
  @end
  
  NS_ASSUME_NONNULL_END
  