NSDateFormatter and NSDateComponentsFormatter example

DateFormatters.swift

import Foundation


let locale = NSLocale(localeIdentifier: "ru_RU")

let dateFormatter = NSDateFormatter()
dateFormatter.timeStyle = .ShortStyle
dateFormatter.dateStyle = .MediumStyle
dateFormatter.locale = locale
dateFormatter.doesRelativeDateFormatting = true
dateFormatter.formattingContext = NSFormattingContext.MiddleOfSentence

let calendar = NSCalendar.autoupdatingCurrentCalendar()
calendar.locale = locale

let units: NSCalendarUnit =
NSCalendarUnit.CalendarUnitYear
    | NSCalendarUnit.CalendarUnitMonth
    | NSCalendarUnit.CalendarUnitDay
    | NSCalendarUnit.CalendarUnitHour
    | NSCalendarUnit.CalendarUnitMinute
    | NSCalendarUnit.CalendarUnitSecond

let dcFormatter = NSDateComponentsFormatter()
dcFormatter.calendar = calendar
dcFormatter.unitsStyle = .Full
dcFormatter.maximumUnitCount = 1
dcFormatter.allowedUnits = units


// Change this value to play around

let interval: NSTimeInterval = 1*3600*24

let date = NSDate(timeIntervalSinceNow: interval)
let components = calendar.components(units, fromDate: NSDate(), toDate: date, options:nil)


// Possible outputs:

dateFormatter.stringFromDate(date)
dcFormatter.stringFromDate(NSDate(), toDate: date)
dcFormatter.stringFromTimeInterval(interval)
dcFormatter.stringFromDateComponents(components)
NSDateComponentsFormatter.localizedStringFromDateComponents(components, unitsStyle: .Full)