Getting date and time from unix timestamp - ios

Question

I am trying to get current date and time from a unix time stamp but it keeps giving me the wrong date this is the code i am currenty
func getDateFromStamp(timeInterval:Int) -> String{
let date = NSDate(timeIntervalSince1970: TimeInterval(timeInterval))
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE, MMM d, h:mm a"
let dateString = dateFormatter.string(from: date as Date)
return dateString
}

Answer 1

Usually unix timestamps are in milliseconds, but Date uses seconds. You might need to divide your timestamp by 1000.

Answer 2

Possible errors:
I try to use milliseconds instead of seconds. timeIntervalSince1970: TimeInterval uses seconds. Divide timeInterval by 1000 beforehand.
Or you have not setup TimeZone.
Don't forget to use Date() instead of NSDate()
It depends on your results and input parameters.
EDIT
To change time zone use this code:
dateFormatter.timeZone = TimeZone(abbreviation: "GMT+01:00")

Answer 3

For Swift 4:
Step:-1 Convert to Date:
let timestamp = "Your TimeStamp here"
var dateFromTimeStamp = Date(timeIntervalSince1970: timestamp as! TimeInterval / 1000)
Step:-2 Convert to appropriate time zone:
let dateFormatter = DateFormatter();
let dateFormat = "dd MMM yyyy"; //Any TimeFormat you want
dateFormatter.dateFormat = dateFormat;
let formattedDate = dateFormatter.string(from: dateFromTimeStamp);
dateFormatter.locale = NSLocale.current;
dateFormatter.timeZone = TimeZone(abbreviation: "GMT"); //Pass Appropriate time zone here.
dateFormatter.dateFormat = dateFormat as String;
let sourceDate = dateFormatter.date(from: formattedDate as String);
print(sourceDate)
Hope so this helps You.