(12 or 24)Time Format ignores 24-Hour Time switch if the region is changed in device-CodePudding

I have 24-Hour Time switch ON on the device and testing the iOS App for different timezones which gives me the correct time format.

Ex:

23:00 PDT if 24-Hour Time switch ON
11 PM PDT if 24-Hour Time switch OFF

But, if I change my region in the device to Japan or France and the corresponding timezones are set. I observe the time format is ignoring the 24-Hour Time switch and always showing the 12-hour format. Whereas, if the region is set to the United States or India I see correct results.

func formattedCloseTime(for date: DateTimeZone) -> String {
    let formatter = dateProvider.formatter
    formatter.timeZone = date.timeZone
    formatter.locale = .autoupdatingCurrent

    let stopTimeMinutes = dateProvider.minutesOfDay(from: date.value, timeZone: date.timeZone)
//    formatter.dateFormat = stopTimeMinutes == 0
//      ? Constants.DateFormat.hourFormat
//      : Constants.DateFormat.hourMinuteFormat
    formatter.setLocalizedDateFormatFromTemplate(stopTimeMinutes == 0
                                                 ? Constants.DateFormat.hourFormat
                                                 : Constants.DateFormat.hourMinuteFormat)
    return formatter.string(from: date.value)
  }

I'm surprised why is it happening only in a few regions. Is there any relation between region and time format? How do I solve this case?

CodePudding user response：

You can lock the date format in 24 hrs by declaring

formatter.dateFormat = "HH:mm"

CodePudding user response：

You can try out by using this code to get 24 hour time formate

func changeTimeFormate() {
    let dateString = "11:00 PM"
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "h:mm a"
    dateFormatter.locale = Locale(identifier: "en_US_POSIX") // fixes nil if device time in 24 hour format
    let date = dateFormatter.date(from: dateString)

    dateFormatter.dateFormat = "HH:mm"
    let date24 = dateFormatter.string(from: date ?? Date())
    print(date24)

}