text: //
  //  NSString+Base64.h
  //  TestDemo
  //
  //  Created by Yostar on 2019/3/1.
  //  Copyright © 2019 Yostar. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  @interface NSString (Base64)
  
  + (NSString *)base64StringFromData:(NSData *)data length:(NSUInteger)length;
  
  @end
  
  NS_ASSUME_NONNULL_END
  