A system-provided dispatch queue that schedules tasks for serial execution on the app's main thread.
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Framework
class OS_dispatch_queue_main : OSYou do not create objects of this type directly. You receive a queue of the appropriate type when you create a new Dispatch object.
class var main: DispatchThe dispatch queue associated with the main thread of the current process.
class func global(qos: DispatchReturns the global system queue with the specified quality-of-service class.
init(label: String, qos: DispatchCreates a new dispatch queue to which you can submit blocks.
enum DispatchQuality-of-service classes that specify the priorities for executing tasks.
struct DispatchAttributes that define the behavior of a dispatch queue.
enum DispatchConstants indicating the frequency with which a dispatch queue autoreleases objects.
class OSA system-provided dispatch queue that schedules tasks for concurrent execution.
class OSA custom dispatch queue that schedules tasks for serial execution on an arbitrary thread.
class OSA custom dispatch queue that schedules tasks for concurrent execution.
typealias dispatchA dispatch queue that is bound to the app's main thread and executes tasks serially on that thread.
typealias dispatchA dispatch queue that executes tasks concurrently using threads from the global thread pool.
typealias dispatchA dispatch queue that executes tasks serially in first-in, first-out (FIFO) order.
typealias dispatchA dispatch queue that executes tasks concurrently and in any order, respecting any barriers that may be in place.