What is the most efficient/recommended way of comparing two NSDates? I would like to be able to see if both dates are on the same day, irrespective of the time and have started writing some code that uses the timeIntervalSinceDate: method within the NSDate class and gets the integer of this value divided by the number of seconds in a day. This seems long winded and I feel like I am missing something obvious.
The code I am trying to fix is:
if (!([key compare:todaysDate] == NSOrderedDescending))
todaysDateSection = [eventSectionsArray count] - 1;
NSDate *todaysDate = [[NSDate alloc] init];
You set the time in the date to 00:00:00 before doing the comparison:
unsigned int flags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay; NSCalendar* calendar = [NSCalendar currentCalendar]; NSDateComponents* components = [calendar components:flags fromDate:date]; NSDate* dateOnly = [calendar dateFromComponents:components]; // ... necessary cleanup
Then you can compare the date values. See the overview in reference documentation.