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.
The following code: dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{ for (int i=0; i<100000; i++) { NSLog(@"…
iphone grand-central-dispatchI have run into this problem a few times while porting Objective-C code to Swift. Say I have the following …
grand-central-dispatch swiftIn My dispach_async code block I cannot access global variables. I am getting this error Variable is not Assignable (…
ios objective-c multithreading objective-c-blocks grand-central-dispatchOkay, so I found out about the new Swifty Dispatch API in Xcode 8. I'm having fun using DispatchQueue.main.async, …
swift grand-central-dispatch swift3 libdispatchi have trouble suspending a gcd query. Here is some code that demonstrates the problem: static dispatch_queue_t q=…
objective-c grand-central-dispatchI have an UIView with an UIImageView subview. I need to load an image in the UIImageView without blocking the …
ios objective-c uiimageview grand-central-dispatchI ran into a scenario where I had a delegate callback which could occur on either the main thread or …
objective-c multithreading objective-c-blocks grand-central-dispatchWhat are the differences between Operation Queue and Dispatch Queue? Under what circumstances will it be more appropriate to use …
iphone objective-c ios cocoa-touch grand-central-dispatchHow to stop/cancel/suspend/resume tasks on GCD queue How does one stop background queue operations? I want to …
ios queue grand-central-dispatchPossible Duplicate: Grand Central Dispatch (GCD) vs. performSelector - need a better explanation To execute "stuff" on the main thread, …
ios objective-c asynchronous grand-central-dispatch nsthread