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Get first day of week without WeekCalendarUnit

I would like to get the first day of the week depending on NSDate.

It works great, but I have a warning because the WeekCalendarUnit is deprecated.

I did some research and I tried to replace WeekCalendarUnit with:

static var CalendarUnitWeekday: NSCalendarUnit { get }
static var CalendarUnitWeekdayOrdinal: NSCalendarUnit { get }
static var CalendarUnitWeekOfMonth: NSCalendarUnit { get }
static var CalendarUnitWeekOfYear: NSCalendarUnit { get }

But I don't have the same result. Here's my garbage of code:

var date = NSDate()
dateFormatter.dateFormat = "dd/YY"
let calendar = NSCalendar.currentCalendar()
let currentDateComponents = calendar.components(.CalendarUnitYear | .WeekCalendarUnit , fromDate: date)
let startOfWeek = calendar.dateFromComponents(currentDateComponents)
var dteString = dateFormatter.stringFromDate(startOfWeek!)
// Output is "17/15"

Any idea?

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1 answer


You can use .CalendarUnitWeekOfYear

in conjunction with .CalendarUnitYearForWeekOfYear

, this should give the intended output:

let currentDateComponents = calendar.components(.CalendarUnitYearForWeekOfYear | .CalendarUnitWeekOfYear , fromDate: date)
let startOfWeek = calendar.dateFromComponents(currentDateComponents)

Alternatively use rangeOfUnit()

(which I personally find easier to use):

var startOfWeek : NSDate?
calendar.rangeOfUnit(.CalendarUnitWeekOfYear, startDate: &startOfWeek, interval: nil, forDate: date)


In Swift 2, this should be changed to

let currentDateComponents = calendar.components([.YearForWeekOfYear, .WeekOfYear ], fromDate: date)
let startOfWeek = calendar.dateFromComponents(currentDateComponents)

and

var startOfWeek : NSDate?
calendar.rangeOfUnit(.WeekOfYear, startDate: &startOfWeek, interval: nil, forDate: date)
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