Question

I am making on application in which user have to select the time, example 5 min or 10 min or 15 min and after that the timer will run arround 15 seconds and will called another function.Timer should have to run after every 15 seconds, i have implemented the above the things and it is working, The only thing which i am not getting is that how to run NSTimer for 5 mins or 10 mins with 15 seconds timeframe, Like timer should run time interval for arround 15 seconds and after 5 minutes it should stop.

Answer 1

You fire timer every 15 seconds and in the timer fire method, keep adding the time and when time reaches 10 mins (or 15 mins), stop the timer.

[NSTimer scheduledTimerWithTimeInterval:15.0f target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES];

-(void) timerFireMethod:(NSTimer *) theTimer {
    _elapsedTime += 15.0f;
    if (_elapsedTime >= 5.0 * 60) {
        // elapsed time is 5 mins.
        [theTimer invalidate];
    }
}