Source for NSCalendarDate+CocoaDevUsersAdditions.h :

#import <Foundation/Foundation.h>

@interface NSCalendarDate (CocoaDevUsersAdditions) -(float)yearsSinceDate:(NSCalendarDate *)referenceDate; -(float)monthsSinceDate:(NSCalendarDate *)referenceDate; -(float)daysSinceDate:(NSCalendarDate *)referenceDate; -(float)hoursSinceDate:(NSCalendarDate *)referenceDate; -(float)minutesSinceDate:(NSCalendarDate *)referenceDate; -(float)secondsSinceDate:(NSCalendarDate *)referenceDate; @end

Source for NSCalendarDate+CocoaDevUsersAdditions.m :

#import “NSCalendarDate+CocoaDevUsersAdditions.h”

@implementation NSCalendarDate (CocoaDevUsersAdditions) //note– refactoring by JoeOsborn… I wish there //were a better way to implement the first two. //um.. these are also untested. Would someone please see if they work?

-(float)yearsSinceDate:(NSCalendarDate *)referenceDate { return [self daysSinceDate:referenceDate]/365.2425; // Still not perfect, but way better than 365. }

-(float)monthsSinceDate:(NSCalendarDate )referenceDate { return [self yearsSinceDate:referenceDate]12; }

-(float)daysSinceDate:(NSCalendarDate *)referenceDate { return [self hoursSinceDate:referenceDate]/24; }

-(float)hoursSinceDate:(NSCalendarDate *)referenceDate { return [self minutesSinceDate:referenceDate]/60; }

-(float)minutesSinceDate:(NSCalendarDate *)referenceDate { return [self secondsSinceDate:referenceDate]/60; }

-(float)secondsSinceDate:(NSCalendarDate *)referenceDate { int secs; [self years:NULL months:NULL days:NULL hours:NULL minutes:NULL seconds:&secs sinceDate:referenceDate]; return (float)secs; }

@end

Category:CocoaDevUsersAdditions