text: //
  //  SDHelper.h
  //  SDBannerView
  //
  //  Created by shendong on 16/3/25.
  //  Copyright © 2016年 shendong. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface SDHelper : NSObject
  
  /**
   *  图片缓存路径
   *
   *  @return <#return value description#>
   */
  + (NSString *)cachePath;
  
  /**
   *  将图片保存到本地缓存中
   *
   *  @param identifier url.absoluteString
   *
   *  @return <#return value description#>
   */
  + (BOOL)saveBannerCache:(NSData *)data WithIdentifier:(NSString *)identifier;
  
  /**
   *  取出本地的图片缓存
   *
   *  @param identifier url.absoluteString
   *
   *  @return <#return value description#>
   */
  
  + (NSData *)getBannerCacheDataWithIdentifier:(NSString *)identifier;
  
  /**
   *  清除轮播图缓存图片
   */
  + (void)clearBannerCache;
  @end
  