Count-Up Timer Required, iPhone Programming

Question

I am new to iPhone programming so am hoping someone can help me out here. I have searched the web, but can only find information on count down timers.

What I am look

Answer 1

There's no difference between an up-counter and down-counter. Just change the order of your subtraction.

UpcounterElapsedTime = UpcounterCurrentTime - UpcounterStartTime;
DowncounterElapsedTime = DownCounterStartTime - DownCounterCurrentTime;

Answer 2

NSDate will provide the current date. You can use - (NSTimeInterval)timeIntervalSinceNow to get the time since the first call and now.