Formatting seconds into hh:ii:ss

Question

I have app that is a basic timer. It tracks the number of seconds the app has run. I want to convert it so the seconds (NSUInteger) are displayed like: 00:00:12 (hh:mm:ss).

Answer 1

This is similar to a previous answer about formatting time but doesn't require a date formatter because we aren't dealing with dates any more.

If you have the number of seconds stored as an integer, you can work out the individual time components yourself:

NSUInteger h = elapsedSeconds / 3600;
NSUInteger m = (elapsedSeconds / 60) % 60;
NSUInteger s = elapsedSeconds % 60;

NSString *formattedTime = [NSString stringWithFormat:@"%u:%02u:%02u", h, m, s];