text: //
  //  DownloaderOperation.h
  //  CorgiWebImageDownloadOperation
  //
  //  Created by Corgi on 17/2/15.
  //  Copyright © 2017年 Corgi. All rights reserved.
  //
  
  #import <UIKit/UIKit.h>
  
  @interface DownloaderOperation : NSOperation
  
  
  
  
  /**
   实例化自定义操作的类方法
  
   @param urlString 图片地址
   @param finishedBlock 下载完成的回调
   @return 实例
   */
  + (instancetype)downloaderOperationWithUrlString:(NSString *)urlString finished:(void (^)(UIImage *image))finishedBlock;
  
  @end
  