NSDateFormatter subtracting a day when removing time

Question

I am trying to remove time from date using NSDateFormatter. This is the code:

func dateWithOutTime( datDate: NSDate?) -> NSDate {

    let formatter = NSDateFormatter()
    formatter.dateFormat = "dd-MM-yyyy"
    let stringDate: String = formatter.stringFromDate(datDate!)
    let dateFromString = formatter.dateFromString(stringDate)

return dateFromString!
}

If i send in ex 04-01-2016 12:00:00, the return is 03-01-2016 23:00:00 I have tried changing the dateFormat, but it still keeps to subtracting a day from the date... Why? Please Help :)

Answer 1

The easiest way is to use startOfDayForDate of NSCalendar

Swift 2:

func dateWithOutTime( datDate: NSDate) -> NSDate {
    return NSCalendar.currentCalendar().startOfDayForDate(datDate)
}

Swift 3+:

func dateWithOutTime(datDate: Date) -> Date {
    return Calendar.current.startOfDay(for: datDate)
}

---

or to adjust the time zone to UTC/GMT

Swift 2:

func dateWithOutTime( datDate: NSDate) -> NSDate {
  let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)!
  calendar.timeZone = NSTimeZone(forSecondsFromGMT: 0)
  return calendar.startOfDayForDate(datDate)
}

Swift 3+:

func dateWithOutTime(datDate: Date) -> Date {
  var calendar = Calendar(identifier: .gregorian)
  calendar.timeZone = TimeZone(secondsFromGMT: 0)!
  return calendar.startOfDay(for: datDate)
}