HTTPDownload

异步多任务类封装

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• 1.下载管理类作为单例对象，接收url，并分发给下载类进行下载

  • (instancetype)sharedManager { static HTTPDownloadManager * manager = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ manager = [[self alloc]init]; }); return manager;

  }

• 2.下载类进行下载任务，下载完成存入缓存数组，并回调到下载管理类

  //下载完成回调 [download setHTTPDownloadFinishBlock:^(HTTPDownload *download) {

    NSLog(@"download---%@",download.responseData);
    //删除任务列表中的数据
    [self.downloadingLists removeObject:url];
    
    //创建一个数组用于保存下载的data数据
    NSMutableDictionary * dict = [[NSMutableDictionary alloc]init];
    
    [dict setValue:download.responseData forKey:[url absoluteString]];
    
    //往下载完成列表中保存数据
    [self.downloadFinishLists addObject:dict];
    
    //下载完成发送通知给控制器
    [[NSNotificationCenter defaultCenter] postNotificationName:@"data" object:nil];
  

  }];