How to get number of days between two dates objective-c

Question

I'm trying to make a label that says how many days left till event. I want to calculate the difference between todays date and the events date. I'm using this code and its giving me -4600. It works fine till I use todays date.

NSDateFormatter *f = [[NSDateFormatter alloc] init];
    [f setDateFormat:@"yyyy-MM-dd"];
    NSDate *startDate = [NSDate date];
    NSDate *endDate = [f dateFromString:end];
    NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *components = [gregorianCalendar components:NSDayCalendarUnit
                                                        fromDate:startDate
                                                          toDate:endDate
                                                         options:0];
    return components.day;
return components.day;

The one question where you say is a duplicate I've used that answer and it doesn't work. — user1898829, Aug 06 '13 at 08:40
Did you verify that `NSDate *endDate = [f dateFromString:end]` returns the expected date? - What does the string `end` contain? — Martin R, Aug 06 '13 at 08:42
@user1898829 Then you should have mentioned that in your question — borrrden, Aug 06 '13 at 08:44

score 16 · Accepted Answer · edited Aug 06 '13 at 09:31

By default [NSDate date] return date in like 2013-08-06 08:50:25 +0000 and you have set your formatter to yyyy-MM-dd this, so you have to convert your startDate to yyyy-MM-dd this form..

Try this

NSDateFormatter *f = [[NSDateFormatter alloc] init];
    [f setDateFormat:@"yyyy-MM-ddHH:mm:ss ZZZ"];
    NSDate *startDate = [NSDate date];
    NSLog(@"%@",startDate);
    NSDate *endDate = [f dateFromString:end];
    NSLog(@"%@",endDate);


    NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *components = [gregorianCalendar components:NSDayCalendarUnit
                                                        fromDate:startDate
                                                          toDate:endDate
                                                         options:0];
    return components.day;

How to get number of days between two dates objective-c

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