zkarj zkarj - 6 months ago 17
Swift Question

Differences in NSDateComponents syntax?

I have been working on a clock app in Swift and with Xcode 6.3.2 the following code builds and runs just fine.

// Get current time
let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute | .CalendarUnitSecond | .CalendarUnitNanosecond, fromDate: date)
let hour = components.hour % 12
let minute = components.minute
let second = components.second
let nanosecond = components.nanosecond


However when I load the same project up in Xcode 7.0 beta and make no changes whatsoever, I get an error on the calendar.components line.

Could not find member 'CalendarUnitHour'


I've looked at the documentation and all of the NSCalendarUnit constants are deprecated (in iOS 8.0 it says) but the method description for the components method still says to use them.

I've played around with other NSCalendarUnit auto-complete values but none produce working code and I can't find any recent examples online, perhaps because this is brand new.

Anyone know the new correct way to do this?

Answer

The NSCalendarUnit names have changed in Swift 2.

Also, now we have to pass these arguments in an array, like this:

let components = calendar.components([.Hour, .Minute, .Second, .Nanosecond], fromDate: date)