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copied!<p>Regarding progress, see <a href="http://afnetworking.github.com/AFNetworking/Classes/AFURLConnectionOperation.html#//api/name/setDownloadProgressBlock:" rel="nofollow noreferrer"><code>setDownloadProgressBlock</code></a> (part of <code>AFURLConnectionOperation</code>, from which <code>AFHTTPRequestOperation</code> is subclassed), e.g.:</p> <pre><code>[operation setDownloadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) { NSLog(@"Sent %d of %d bytes, %@", totalBytesWritten, totalBytesExpectedToWrite, path); }]; </code></pre> <p>And, in your code sample, you're calling <code>setCompletionBlockWithSuccess:failure:</code>, so that provides the status regarding the completion of the individual operations. Personally, in my little test, I just maintain an array of my requested downloads, and have these three blocks (progress, success, and failure) update the status code of my downloads like so:</p> <pre><code>for (NSInteger i = 0; i < 20; i++) { NSURLRequest *request = ... // set the request accordingly // create a download object to keep track of the status of my download DownloadObject *object = [[DownloadObject alloc] init]; download.title = [NSString stringWithFormat:@"Download %d", i]; download.status = kDownloadObjectStatusNotStarted; [self.downloadObjects addObject:download]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { download.status = kDownloadObjectStatusDoneSucceeded; // update my UI, for example, I have table view with one row per download // // [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:i inSection:0]] // withRowAnimation:UITableViewRowAnimationNone]; } failure:^(AFHTTPRequestOperation *operation, NSError *error) { download.status = kDownloadObjectStatusDoneFailed; // update UI // // [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:i inSection:0]] // withRowAnimation:UITableViewRowAnimationNone]; }]; [operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) { download.totalBytesRead = totalBytesRead; download.status = kDownloadObjectStatusInProgress; // update UI // // [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:i inSection:0]] // withRowAnimation:UITableViewRowAnimationNone]; }]; [queue addOperation:operation]; } </code></pre> <p>You can keep track of the individual downloads this way. You can also just keep track of the pending operations (or query the <code>HTTPClient</code> object's <code>operationQueue</code> property, and look at the <code>operationCount</code> property of that).</p> <hr> <p>In terms of downloading 100 files, two considerations:</p> <ul> <li><p>I would have thought that you'd want to call <code>setMaxConcurrentOperationCount</code> on the <code>operationQueue</code> of your <code>HTTPClient</code> subclass, setting it to some reasonable number (4 or 5), as glancing at the AFNetworking code, it doesn't seem to do that. I find that there are diminishing returns if you go much above that, and if all of the files are from a single server, there are constraints on how many concurrent operations can be done between a given client and given server.</p></li> <li><p>I've read anecdotal claims that the Apple will reject apps that make extraordinary requests over cellular network. See <a href="https://stackoverflow.com/a/14922807/1271826">https://stackoverflow.com/a/14922807/1271826</a>. </p></li> </ul>

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