CODEWITHSUNDEEP
swiftcocoagrand-central-dispatchnsnotifications
pomo_mondreganto
pomo_mondreganto

Reputation: 2074

Catch NSNotification from another GCD queue

I'm running the background process using this code: 

func launchTor(hashedPassword hash : String) {
    dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)) {
    // Do some stuff here
    let observer = NSNotificationCenter.defaultCenter().addObserverForName("AppTerminates", object: nil, queue: nil) {
            notification -> Void in
            print("Terminating...")
            // Do smh here
        }
    }
    // Just some more stuff
}

Is there any way to specify the queue (GCD) that needs to catch the notification?

Upvotes: 0

Views: 203

Answers (1)

werediver
werediver

Reputation: 4757

- addObserverForName:object:queue:usingBlock: method is an extra feature provided by NSOperationQueue class which is based on Grand Central Dispatcher:

Operation queues use the libdispatch library (also known as Grand Central Dispatch) to initiate the execution of their operations.

(from the beginning of the NSOperationQueue class reference)

This feature can be re-implemented if there are reasons for that (e.g. different behaviour or educational purposes), otherwise it may be worth switching to NSOperationQueue instead of bare GCD.

Upvotes: 1

Related Questions