iPhone dev — performSelector:withObject:afterDelay or NSTimer?

Question

To repeat a method call (or message send, I guess the appropriate term is) every x seconds, is it better to use an NSTimer (NSTimer\'s scheduledTimerWithTimeInterval:ta

Answer 1

A timer is more suited to a strictly defined interval. You will lose accuracy if you have your function call itself with a delay because its not really synced to a time interval. There's always the time taken to run the actual method itself as well which puts the interval out.

Stick with an NSTimer, I'd say.