If you need to convert a total number of seconds into specific components (days, hours, minutes and seconds) in Objective-C, you can use this code snippet.  You can probably do this a million other ways, but this works beautifully for me:

    NSNumber *valueForDisplay = [NSNumber numberWithDouble:
              [self valueForDisplay:clockName]];

    NSNumber *totalDays = [NSNumber numberWithDouble:
             ([valueForDisplay doubleValue] / 86400)];
    NSNumber *totalHours = [NSNumber numberWithDouble:
             (([valueForDisplay doubleValue] / 3600) -
              ([totalDays intValue] * 24))];
    NSNumber *totalMinutes = [NSNumber numberWithDouble:
             (([valueForDisplay doubleValue] / 60) -
             ([totalDays intValue] * 24 * 60) -
             ([totalHours intValue] * 60))];
    NSNumber *totalSeconds = [NSNumber numberWithInt:
             ([valueForDisplay intValue] % 60)];

The above assumes that valueForDisplay contains the total value in seconds.  Enjoy.