nsoperationqueue

So, I have a group of ASINetworkQueues that currently run together resulting in a race condition when it comes to DB saves. I am trying to create an NSOperationQueue that will will queue each of these "sub queues". I currently have created an NSOperation with a main method that kicks off the "sub queue" to start it's download. My problem is that each time I add a sub queue to the main queue using "addOperation" it fires that "main" method straight away so my sub queues run concurrently. I was under the impression the main method was fired one at a time. i.e. only for the operation at the top

I'm having problems to execute a https requests, if the request don't have any error i never get the message, this is a command line tool application and i have a plist to allow http requests, i always see the completion block. typealias escHandler = ( URLResponse?, Data? ) -> Void func getRequest(url : URL, _ handler : @escaping escHandler){ let session = URLSession.shared var request = URLRequest(url:url) request.cachePolicy = .reloadIgnoringLocalCacheData request.httpMethod = "GET" let task = session.dataTask(with: url ){ (data,response,error) in handler(response,data) } task.resume() }

Wondering if I'm implementing the below method correctly because isCancelled is not canceling the thread. I have an image that I'm scaling, and when it's done scaling, this method is called to update the image. So when the user lifts their finger off the button, this is called. If they try to push the button again before this is finished, I call cancelAllOperations on the queue but it's not working. Not even sure if cancelAllOperations triggers a flag, or if I need to keep calling it to get a result. Anyone have any insight on this? - (void) refreshImage { NSBlockOperation *operation = [

I'm moving my code from regular GCD to NSOperationQueue because I need some of the functionality. A lot of my code relies on dispatch_after in order to work properly. Is there a way to do something similar with an NSOperation ? This is some of my code that needs to be converted to NSOperation . If you could provide an example of converting it using this code, that would be great. dispatch_queue_t queue = dispatch_queue_create("com.cue.MainFade", NULL); dispatch_time_t mainPopTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timeRun * NSEC_PER_SEC)); dispatch_after(mainPopTime, queue, ^(void){

I am using a NSOperationQueue to queue and call a number of Geocoding location lookups. I want to call a completion method when all asynchronicly running lookups have been finished. -(void)geocodeAllItems { NSOperationQueue *geoCodeQueue = [[NSOperationQueue alloc]init]; [geoCodeQueue setName:@"Geocode Queue"]; for (EventItem *item in [[EventItemStore sharedStore] allItems]) { if (item.eventLocationCLLocation){ NSLog(@"-Location Saved already. Skipping-"); continue; } [geoCodeQueue addOperationWithBlock:^{ NSLog(@"-Geocode Item-"); CLGeocoder* geocoder = [[CLGeocoder alloc] init]; [self