如何在iOS Swift中实现多线程、并发或并行?

Is there any way to create a worker thread in Swift?, for example, if there's a major functionality that requires a lot of calculations and hence causes the main thread to delay for a few seconds, if I would like to move that functionality to a separate thread or a thread that do not block the main thread is there any way to do it with Swift? Is there any way to create a worker thread in S