That is what i’m trying to do, the problem is that I do not know how to get the “right date”. For example, I could get the day and all but I don’t know how to deal with daylight savings and timezones and all that. I’m lost man

Basically I’m trying to get the date and be able to get to the next day or previous day.. but I just can’t figure out! ( with the assumption of taking into consideration the handling of time zones and all different calendars around the world.

Do you have any suggestions and all? I would even donate for the help!

Nice catch, and thanks for letting me know about the daysAgo issue.

I really enjoyed your comment above, “Simple task, I thought. Until I looked at the documentation…”, I experienced the same thing when putting together my own code. When I look around at examples it just seems like there aren’t too many snappy ways of doing this. Also, I’m spoiled by ActiveSupport in Rails, so that’s why I started the NSDate (Helper) project, figure at least group up some of these calculations.

http://github.com/billymeltdown/nsdate-helper

I should have the daysAgo fix in there soon!

Cheers,
Billy

If [NSDate date] = 2009-02-20 12:26:00:

NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
[NSDateFormatter setDefaultFormatterBehavior:NSDateFormatterBehavior10_4];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; /* Unicode Locale Data Markup Language */
NSDate *date1 = [formatter dateFromString:@"2009-02-20 12:10:00"];
NSDate *date2 = [formatter dateFromString:@"2009-02-19 14:10:00"];
NSDate *date3 = [formatter dateFromString:@"2009-02-18 23:59:00"];
NSDate *date4 = [formatter dateFromString:@"2009-02-18 11:30:00"];

NSLog(@”diff1: %d”, (int)([date1 timeIntervalSinceNow] / (60*60*24)));
NSLog(@”diff2: %d”, (int)([date2 timeIntervalSinceNow] / (60*60*24)));
NSLog(@”diff3: %d”, (int)([date3 timeIntervalSinceNow] / (60*60*24)));
NSLog(@”diff4: %d”, (int)([date4 timeIntervalSinceNow] / (60*60*24)));

diff1: 0 correct: today
diff2: 0 incorrect: yesterday
diff3: -1 incorrect: two days ago
diff4: -2 correct: two days ago

NSUInteger dayDiff = (int)[date timeIntervalSinceNow] / (60*60*24) * -1;