Grand Central Dispatch (GCD) provides a simple and robust mechanism for concurrent and asynchronous operations, primarily in Apple operating systems (e.g., iOS, macOS, watchOS, and tvOS), but also FreeBSD and MidnightBSD.
I'm learning about concurrent programming for iOS. So far I've read about NSOperation/NSOperationQueue and GCD. What are the reasons …
ios concurrency grand-central-dispatch nsoperation nsoperationqueueI have a scenario in my app, where I want to do some time consuming task which consists of some …
ios objective-c multithreading grand-central-dispatch dispatch-asyncHow could I make my code wait until the task in DispatchQueue finishes? Does it need any CompletionHandler or something? …
swift multithreading asynchronous swift3 grand-central-dispatchI am getting EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) on dispatch_semaphore_dispose but don't really know …
ios objective-c exception grand-central-dispatchIf you can target iOS 4.0 or above Using GCD, is it the best way to create singleton in Objective-C (thread …
ios objective-c singleton grand-central-dispatchI would like a for in loop to send off a bunch of network requests to firebase, then pass the …
swift asynchronous grand-central-dispatch nsoperationFor the longest time I thought asynchronous was synonymous to running something on a background thread, while synchronous meant on …
ios objective-c multithreading asynchronous grand-central-dispatchIf I have a serial queue, how can I, from the main thread, tell it to immediately stop execution and …
iphone ios multithreading xcode grand-central-dispatchStarting to learn about core data and dispatch_async. There is a block of code to get url of image …
objective-c ios grand-central-dispatchBear with me, this is going to take some explaining. I have a function that looks like the one below. …
objective-c cocoa core-data grand-central-dispatch objective-c-blocks