In what cases is the dispatching concept used in software systems?

Dispatching in software systems is a mechanism for selecting and invoking the appropriate handler or method based on the context or data type at runtime.

In iOS, the concept of dispatching is often used when working with events, for example, when the system calls a specific delegate method or handler in response to a user action or system event. This allows for flexible responses to different situations without tight coupling to specific implementations.

Dispatching is also used in multithreading to distribute tasks across different queues (e.g., DispatchQueue), enabling asynchronous and efficient code execution.

Example: calling a delegate method when a button is pressed, where the system itself chooses which method to invoke based on the assigned delegate.