Get the name of the weekday on iOS - ios

Question

I compute the name of the day like this:
func loadDayName(forDate date: NSDate) -> String{
let myComponents = calendar.components(.Weekday, fromDate: date)
let weekDay = myComponents.weekday
switch weekDay {
case 1:
return "Sunday"
case 2:
return "Monday"
case 3:
return "Tuesday"
case 4:
return "Wednesday"
case 5:
return "Thursday"
case 6:
return "Friday"
case 7:
return "Saturday"
default:
return "Nada"
}
}
It is working fine but I was wondering if Swift comes with some libraries to do that automatically.

Answer 1

Use DateFormatter
Swift 4
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE"
let dayInWeek = dateFormatter.string(from: date)
Swift3
let date = NSDate()
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "EEEE" // "EE" to get short style
let dayInWeek = dateFormatter.stringFromDate(date) // "Sunday"
Screenshot

Answer 2

If you want to get the array of day names you could use: weekdaySymbols in Calendar()
example:
let calendar = Calendar(identifier: .gregorian)
let days = calendar.weekdaySymbols

Answer 3

There's a new api since iOS 15.
#available(macOS 12.0, iOS 15.0, tvOS 15.0, watchOS 8.0, *)
extension FormatStyle where Self == Date.FormatStyle {
public static var dateTime: Date.FormatStyle { get }
}
You can now use:
Date().formatted(.dateTime.month(.wide)) // October
Date().formatted(.dateTime.year(.defaultDigits)) // 2022
Date().formatted(.dateTime.weekday(.wide)) // Thursday
Date().formatted(.dateTime.weekday(.abbreviated)) // Thu
Date().formatted(.dateTime.weekday(.narrow)) // T
and so on and so on

Answer 4

You can check also this DateFormatter
let dayNameFormatter: DateFormatter = {
let dateFormatter = DateFormatter()
dateFormatter.locale = .current
dateFormatter.calendar = .current
dateFormatter.dateFormat = "cccc"
return dateFormatter
}()
print(dayNameFormatter.string(from: Date())) Prints today's day name 🤪
c - stands for day of the week, good answer, official source