I am new to NSURLSession and specially background download tasks. Is there a way to query NSURLSession to return a list of background tasks? It seems possible to make duplicate requests for background download tasks. I do not get any error if I make the same url download request while a previous one is still in progress.
What is the best way to handle this situation? I can maintain a list of urls I am currently downloading from, but in case the app is relaunched I lose this reference. I can again store this information in persistent storage. But it just seems inconvenient not to have an option to query NSURLSession for this.
You could get the list of all download tasks added to the session with the following call.
[[self defaultSession] getTasksWithCompletionHandler:^(NSArray *dataTasks, NSArray *uploadTasks, NSArray *downloadTasks) {
}];