Notifications, part 2 – Handling and Spying
Grand Central Dispatch, a.k.a libdispatch and usually referred to as GCD, is a low-level API known for performing asynchronous background work. dispatch_async is its poster child: “Throw this block on a background thread to do some work, and inside of that block toss another block on the main thread to update the UI.”
Not all of GCD is asynchronous, though.… [...continued]


















