Question

I really need help. The code result is 2:0:0 while the format is set to hh:mm:ss. I want the result to be 2:00:00 (adding 0 in front of the minutes and seconds when they are under 10).

NSDateFormatter *test = [[NSDateFormatter alloc] init];
[test setDateFormat:@"HH:mm:ss"];
NSDate *date1 = [test dateFromString:@"18:00:00"];
NSDate *date2 = [test dateFromString:@"20:00:00"];
NSCalendar* gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
unsigned int uintFlags =  NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDateComponents* differenceComponents = [gregorian components:uintFlags fromDate:date1 toDate:date2 options:0];

NSLog(@"%d:%d:%d",[differenceComponents hour],[differenceComponents minute],[differenceComponents second]);

How to do this?

Answer 1

Log using the %02ld specifier, for example:

NSLog(@"%ld:%02ld:%02ld",[differenceComponents hour],[differenceComponents minute],[differenceComponents second]);

Output:

2:00:00

Additionally create NSStrings like this:

NSString *theString = [NSString stringWithFormat:@"%ld:%02ld:%02ld",[differenceComponents hour],[differenceComponents minute],[differenceComponents second]];
NSLog(@"%@",theString);