Async
Syntactic sugar in Swift for asynchronous dispatches
Async is a syntactic sugar in Swift for asynchronous dispatches in Grand Central Dispatch. Now more than syntactic sugar for asynchronous dispatches in Grand Central Dispatch (GCD) in Swift. Custom queues, dispatch block after delay, cancel blocks that aren't already dispatched. The way it work is by using the new notification API for GCD introduced in OS X 10.10 and iOS 8. Each chaining block is called when the previous queue has finished. The dispatch_block_t can't be extended. Workaround...