Question

I have a method I would like to execute (non repeating) after a time delay.

I could use performSelector:afterDelay or I could schedule an NSTimer and specify the selector as a parameter to that.

What are the advantages / disadvantages of using one over the other if the end result is the same (which is that my method will be called after the specified time delay).
Is it not matter which one I use?

(In case it is relevant, my method will get called both in the foreground and when the app moves to the background during the 10 minute window available via beginBackgroundTaskWithEcpirationHandler).

TIA

Answer 1

from the apple reference of NSObject class about performSelector: method

This method sets up a timer to perform the aSelector message on the
current thread’s run loop. The timer is configured to run in the
default mode (NSDefaultRunLoopMode). When the timer fires, the thread
attempts to dequeue the message from the run loop and perform the
selector. It succeeds if the run loop is running and in the default
mode; otherwise, the timer waits until the run loop is in the default
mode.

so if you only want to make single call, I think you can freely use performSelector:afterDelay: