AFNetworking + queue + cancel operations + junk files

i 'm downloading some files using AFNetworking using a queue. Here is my code: ``` apiClient =[[AFHTTPClient alloc]initWithBaseURL: [NSURL URLWithString:ZFREMOTEHOST]]; for (NSString *element in self.productsArray) { NSURL *url = [NSURL URLWithString:element]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; op = [[AFHTTPRequestOperation alloc] initWithRequest:request]; NSString *documentsDirectory = nil; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); documentsDirectory = [paths objectAtIndex:0]; NSString *targetFilename = [url lastPathComponent]; NSString *targetPath = [documentsDirectory stringByAppendingPathComponent:targetFilename]; op.outputStream = [NSOutputStream outputStreamToFileAtPath:targetPath append:NO]; [op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { } failure:^(AFHTTPRequestOperation *operation, NSError *error) { //failure case NSLog(@"BaaZ File NOT Saved %@", targetPath); //remove the file if saved a part of it! NSFileManager *fileManager = [NSFileManager defaultManager]; [fileManager removeItemAtPath:targetPath error:&error]; if (error) { NSLog(@"error dude"); } if ([operation isCancelled]) { //that doesn't work. NSLog(@"Canceled"); } }]; [op setDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) { if (totalBytesExpectedToRead > 0) { dispatch_async(dispatch_get_main_queue(), ^{ self.progressView.alpha = 1; self.progressView.progress = (float)totalBytesRead / (float)totalBytesExpectedToRead; NSString *label = [NSString stringWithFormat:@"Downloaded %lld of %lld bytes", totalBytesRead,totalBytesExpectedToRead]; self.progressLabel.text = label; }); } }]; [self.resourcesArray addObject:op]; } for (AFHTTPRequestOperation *zabols in self.resourcesArray) { [apiClient.operationQueue addOperation:zabols]; } ``` the code is working fine on file downloading but i want some cancel functionality so i have a button with an action that has the code below: ``` [apiClient.operationQueue cancelAllOperations]; ``` the operations cancel file but then there are some junk files on the Documents folder. By saying junk i mean file that started downloading i canceled them and the i get a file with the same name but useless can't be opened cause it's damaged. How can i prevent AF from doing that and keep only the completed files when i cancel it? any help would be grateful. Also tried canceling job by job like that: ``` for (AFHTTPRequestOperation *ap in apiClient.operationQueue.operations) { [ap cancel]; NSLog(@"%@",ap.responseFilePath); NSFileManager *fileManager = [NSFileManager defaultManager]; [fileManager removeItemAtPath:ap.responseFilePath error:nil]; } ``` and deleting the junk files but that doesn't work either.