How to calculate the age based on NSDate

Question

how to calculate the age based on the birth date in this format 6/24/1976 mon/date/year...

Answer 1

the easiest way is to use the NSCalendar:

NSDate *_dateOfBirth = ...;
NSDateComponent *_diff = [[NSCalendar currentCalendar] components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:_dateOfBirth toDate:[NSDate date] options:0];

NSLog(@"%@", _diff);