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Threads. A thread is a sequence of instructions that can be executed by a runtime. Each process has at least one thread. In iOS, the primary thread on which the process is started is commonly referred to as the main thread. This is the thread in which all UI elements are created and managed.
That queue is a dispatch queue, which means that the answer is in the documentation for Grand Central Dispatch, which is the system framework that deals with dispatch queues. Posted 5 years ago by.
Overview. Use this class when you want to have an Objective-C method run in its own thread of execution. Threads are especially useful when you need to perform a lengthy task, but don't want it to block the execution of the rest of the application.
As I understand there are 3 types of DispatchQueue in swift: Main (serial) (Main Thread) Global (Concurrent) (Background Threads working in parallel) Custom (Concurrent or serial)
I am new to iOS development. Now I am quite confused about the two concepts: "thread" and "queue". All I know is that they both are about multithread programming. Can anyone interpret those two concepts and the difference between them for me? Thanks in advance!
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