Convert Int To Date Formatter value - ios

Question

Below code I used to convert Int to Time.
//MARK: - Convert Date To String
func dateToString(date: Date, dateFormat: String) -> String {
let dateFormater = DateFormatter()
dateFormater.dateFormat = dateFormat
let dateStr = dateFormater.string(from: date)
return dateStr
}
if let updatedOn = self.dict?["updated_on"]?.intValue{
var updatedValue = updatedOn/1000
let timeInterval = TimeInterval(updatedValue)
let dateValue = Date(timeIntervalSince1970: timeInterval)
let stringDate = dateToString(date: dateValue, dateFormat: "MM/dd/yyyy HH:mm:ss a zzz")
print("stringDate \(stringDate)") // StringDate 11/14/2022 19:05:49 PM GMT+5:30
}
Which print time value.
In UI need to shown in this formate "11/14/2022 01:35:49 PM GMT", After converting I am getting "11/14/2022 19:05:49 PM GMT+5:30".
How to convert the resultant stringDate to "11/14/2022 01:35:49 PM GMT" ?
Second Question
Which is standard process to show date Value with timezone as per guidelines?

Answer 1

If you want the output in GMT (UTC) then set the formatter's timezone to GMT. Apparently you are using your current time zone which happens to be GMT+5:30.
func dateToString(date: Date, dateFormat: String) -> String {
let dateFormater = DateFormatter()
dateFormater.dateFormat = dateFormat
dateFormater.timeZone = TimeZone(secondsFromGMT: 0)
let dateStr = dateFormater.string(from: date)
return dateStr
}
You should avoid using a hardcoded date format when showing a date to a user. MM/dd/yyyy will confuse most of the world that normally see dd/MM/yyyy. If anything, use a template such as ddMMyyyyHHmmsszzz and let DateFormatter generate the proper locale-specific dateFormat from the template.
I would also suggest not using a with HH. a should only be used with hh.
func dateToString(date: Date, dateFormat: String) -> String {
let dateFormater = DateFormatter()
dateFormater.dateFormat = DateFormatter.dateFormat(fromTemplate: dateFormat, options: 0, locale: Locale.current)
dateFormater.timeZone = TimeZone(secondsFromGMT: 0)
let dateStr = dateFormater.string(from: date)
return dateStr
}
if let updatedOn = self.dict?["updated_on"]?.intValue{
var updatedValue = updatedOn/1000
let timeInterval = TimeInterval(updatedValue)
let dateValue = Date(timeIntervalSince1970: timeInterval)
let stringDate = dateToString(date: dateValue, dateFormat: "MMddyyyyHHmmsszzz")
print("stringDate \(stringDate)")
}