NSURLSession cancel Task

Question

I create new NSURLSession with following configs

 if (!self.session) {
            NSURLSessionConfiguration *config = [NSURLSessionConfiguration backgroundS         


        

Answer 1

I do not reccommend to use invalidateAndCancel method cause the queue and its identifier keeps invalidated and cannot be reused untill you reset the whole device.

NSURLSession class reference

I use this code to cancel all pending tasks.

- (void) cancelDownloadFiles
{

    [self.session getTasksWithCompletionHandler:^(NSArray *dataTasks, NSArray *uploadTasks, NSArray *downloadTasks) {

        for (NSURLSessionTask *_task in downloadTasks)
        {
            [_task cancel];

            id<FFDownloadFileProtocol> file = [self getFileDownloadInfoIndexWithTaskIdentifier:_task.taskIdentifier];

            [file.downloadTask cancel];

            // Change all related properties.
            file.isDownloading = NO;
            file.taskIdentifier = -1;
            file.downloadProgress = 0.0;

        }

    }];

    cancel = YES;
}

Answer 2

That is the expected behaviour, when you cancel tasks on a session they might still call the delegate method.

Have you check the state of the given task? It should be NSURLSessionTaskStateCanceling.