Swift Language Concurrency
Syntax
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Swift 3.0
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DispatchQueue.main // Get the main queue
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DispatchQueue(label: "my-serial-queue", attributes: [.serial, .qosBackground]) // Create your own private serial queue
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DispatchQueue.global(attributes: [.qosDefault]) // Access one of the global concurrent queues
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DispatchQueue.main.async { ... } // Dispatch a task asynchronously to the main thread
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DispatchQueue.main.sync { ... } // Dispatch a task synchronously to the main thread
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DispatchQueue.main.asyncAfter(deadline: .now() + 3) { ... } // Dispatch a task asynchronously to the main thread to be executed after x seconds
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Swift < 3.0
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dispatch_get_main_queue() // Get the main queue running on the main thread
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dispatch_get_global_queue(dispatch_queue_priority_t, 0) // Get global queue with specified priority dispatch_queue_priority_t
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dispatch_async(dispatch_queue_t) { () -> Void in ... } // Dispatch a task asynchronously on the specified dispatch_queue_t
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dispatch_sync(dispatch_queue_t) { () -> Void in ... } // Dispatch a task synchronously on the specified dispatch_queue_t
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(nanoseconds)), dispatch_queue_t, { ... }); // Dispatch a task on the specified dispatch_queue_t after nanoseconds
