HKMultiFileDownloader

用法如下： __weak typeof(self) weakSelf = self; [HKMultiFileDownloader hk_downloadWithURL:@"http://ww1.sinaimg.cn/mw690/5993966fjw1f5v1u972lbj20sg0iztby.jpg" completion:^(NSError *error, NSData *data) { if (!error) { UIImage *image = [UIImage imageWithData:data scale:1]; weakSelf.imageView.image = image; }else { weakSelf.imageView.image = nil; } }];