AFNetworking 2：限制最大并发下载任务数

Question

I'm dealing with an app that implements a download queue created with AFNetworking 2.0 and I will like to know if there is a way to limit the maximum number of download tasks ( NSURLSessionDownloadTask ) running at the same time.

My final goal is that my download queue manages all the tasks so one is finished, then the next one will start.

I know that, for example, NSOperationQueue has the maxConcurrentOperationCount property, but I don't know if AFNetworking 2.0 uses NSOperationQueue in a lower level with download tasks. Also, I know that AFURLSessionManager has an NSArray with all the running download tasks, but is just that, an array.

Thanks

Answer 1

AFNetworking has an operation queue, which you can set the number of concurrent operations

[[self.requestOperationManager operationQueue] setMaxConcurrentOperationCount:2];

this works fine for downloads and requests

Note: a good technique that i use, is to have 2 network managers, one for common requests, which has setMaxConcurrentOperationCount of 1 (i need my requests to be performed sequentially) and a downloader, which has setMaxConcurrentOperationCount to 2