Comparing time and date in objective C

Question

How do I compare in objective C to see if a certain time and date period overlaps another that is already in a plist for example?

This is most commonly used in booki

Answer 1

Try this to Compare ..

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
            [dateFormat setDateFormat:@"MM/dd/yyyy hh:mm:ss aa"];


NSDate *dateOne=[dateFormat dateFromString:@"01/09/2011 11:12:10 AM" ];
        NSDate *dateTwo = [NSDate date];

        switch ([dateOne compare:dateTwo]){
            case NSOrderedAscending:
                //NSLog(@"NSOrderedAscending");
                break;
            case NSOrderedSame:
                //NSLog(@"NSOrderedSame");
             {
break;
            case NSOrderedDescending:
                //NSLog(@"NSOrderedDescending");
                break;
        }

[dateFormat release];