Swift. Set specific time format(12/24h) for custom Locale - ios

Question

I want to get the time in 12h or 24h format from DateFormatter according to option "24-Hour-Time" in User Preferences.
If I set "24-Hour-Time" = "on" and DateFormatter like this:
let formatter = DateFormatter()
let locale = Locale(identifier: "en_US")
print(locale) // "en_US (fixed)\n"
formatter.locale = locale
formatter.dateStyle = .none
formatter.timeStyle = .short
formatter.string(from: Date()) // "2:54 PM" (not "14:54")
But if I set:
let locale = Locale.current // "en_US (current)\n"
instead of
let locale = Locale(identifier: "en_US") // "en_US (fixed)\n"
the result will be
formatter.string(from: Date()) // "14:54"
How to create custom locale setting 12 or 24 hour format.

Answer 1

//MARK:- use this to convert 24 hours time format to 12 hour Formate String
func TwelveHourFormateFrom24Hours(time : String)->String
{
let Time = time.components(separatedBy: ".")
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "H:mm:ss"
if let inDate = dateFormatter.date(from: Time[0])
{
dateFormatter.dateFormat = "h:mm a"
dateFormatter.timeZone = TimeZone.current
let outTime = dateFormatter.string(from: inDate)
print("in \(time)")
print("out \(outTime)")
return outTime
}
return time
}
//MARK:- 24 hour Formate String
func TwentyFourHourFormate(time : String)->String
{
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "h:mm a"
if let inDate = dateFormatter.date(from: time)
{
dateFormatter.dateFormat = "H:mm:ss.sss"
let outTime = dateFormatter.string(from: inDate)
print("in \(time)")
print("out \(outTime)")
return outTime
}
return time
}