Get the first day of week without WeekCalendarUnit

Question

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

It works fine but I have a warning because WeekCalendarUnit is deprecated.

I made some

Answer 1

You can use .CalendarUnitWeekOfYear in combination with .CalendarUnitYearForWeekOfYear, this should give the intended result:

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 has to 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)