Question

Possible Duplicate:
iPhone – get number of days between two dates

I am trying to compare 2 dates and find out the number of day in between them.

something like below:

now = [NSDate date];

// This is i am saving in NSUSerdefault on some condition,like 

if (a == 1) {

    dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.dateFormat = @"yyyy-MM-dd HH:MM:SS";
    [dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
    NSLog(@"The Current Time is %@",[dateFormatter stringFromDate:now]);
    datesaved = [NSString stringWithFormat:@"%@",[dateFormatter stringFromDate:now]];
    NSLog(@"old date saved : %@",datesaved);

    [dateFormatter release];
}

and
find current date .

Now i want to compare current date with the date saved in NSUserDefaults to find number of day in between them.

ex:

The Current Time is 2012-12-16 19:12:74
old date saved : 2012-12-12
19:12:74

Number of days : 4

Thanks

Answer 1

NSDate *date1 = [NSDate dateWithString:@"2010-01-01 00:00:00 +0000"];
NSDate *date2 = [NSDate dateWithString:@"2010-02-03 00:00:00 +0000"];

NSTimeInterval secondsBetween = [date2 timeIntervalSinceDate:date1];

int numberOfDays = secondsBetween / 86400;

NSLog(@"There are %d days in between the two dates.", numberOfDays);