NSDateFormatter in Swift ?

The object of NSDateFormatter which create string is represent of NSDate objects. also conversation of dates and times of NSDate object. You have flexibility to change of NSDate object using NSDateFormatter object.

Here some of Example, To change of NSDate object formate using NSDateFormatter. 

Thursday, Mar 17, 2016

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "EEEE, MMM d, yyyy"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

 03/17/2016

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "MM/dd/yyyy"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

03-17-2016 07:10

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "MM-dd-yyyy HH:mm"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

Mar 17, 7:10 AM

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "MMM d, H:mm a"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

March 2016

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "MMMM yyyy"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

17.03.16

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "dd.MM.yy"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

Mar 17, 2016

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "MMM d, yyyy"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

Thu, 17 Mar 2016 07:10:30 -0500

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "E, d MMM yyyy HH:mm:ss Z"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

2016-03-17T07:10:30-0500

let dateFormate = NSDateFormatter()
dateFormate.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

NSDateFormatterStyle  :

You can set dateStyle and timeStyle according to requirement and independently. To display only time then set only timeStyle, for date to set dateStyle, and Both of use then adding dateStyle and timeStyle in NSDateFormate.

3/17/16 : ShortStyle 

let dateFormate = NSDateFormatter()
dateFormate.dateStyle = NSDateFormatterStyle.ShortStyle    
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

Mar 17, 2016, 6:12:30 PM : MediumStyle 

let dateFormate = NSDateFormatter()
dateFormate.dateStyle = NSDateFormatterStyle.MediumStyle
dateFormate.timeStyle = NSDateFormatterStyle.MediumStyle    
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

March 17, 2016 at 6:14:36 PM GMT+5:30 : LongStyle 

let dateFormate = NSDateFormatter()
dateFormate.dateStyle = NSDateFormatterStyle.LongStyle
dateFormate.timeStyle = NSDateFormatterStyle.LongStyle    
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)

Thursday, March 17, 2016 : FullStyle

let dateFormate = NSDateFormatter()
dateFormate.dateStyle = NSDateFormatterStyle.FullStyle 
let date = NSDate()
let stringOfDate = dateFormate.stringFromDate(date)
print(stringOfDate)