This line of code I could not get to compile in S2 (yes it worked in 1.2):
let newerDate = calendar.dateByAddingUnit(NSCalendarUnit.Day, value: 1, toDate: NSDate(), options: nil)
The error message:
Cannot invoke 'dateByAddingUnit' with an argument list of type '(NSCalendarUnit, value: Int, toDate: NSDate, options: nil)'
Must be a bug.