How can I compare two dates, return a number of days

Question

how can I compare two dates return number of days. Ex: Missing X days of the Cup. look my code.

  NSDateFormatter *df = [[NSDateFormatter alloc]init];     [df setDateFormat:@"d MMMM,yyyy"];     NSDate *date1 = [df dateFromString:@"11-05-2010"];     NSDate *date2 = [df dateFromString:@"11-06-2010"];     NSTimeInterval interval = [date2 timeIntervalSinceDate:date1];     //int days = (int)interval / 30;     //int months = (interval - (months/30)) / 30;     NSString *timeDiff = [NSString stringWithFormat:@"%dMissing%d days of the Cup",date1,date2, fabs(interval)];      label.text = timeDiff; // output (Missing X days of the Cup)   

Answer 1

From Apple's example, basically use an NSCalendar:

NSDate * date1 = <however you initialize this>; NSDate * date2 = <...>;  NSCalendar *gregorian = [[NSCalendar alloc]                  initWithCalendarIdentifier:NSGregorianCalendar];  NSUInteger unitFlags = NSMonthCalendarUnit | NSDayCalendarUnit;  NSDateComponents *components = [gregorian components:unitFlags                                           fromDate:date1                                           toDate:date2 options:0];  NSInteger months = [components month]; NSInteger days = [components day];