Xcode swift am/pm time to 24 hour format

Question

I am trying to convert a am/pm format time to a 24 hour format time

6:35 PM to 18:35

I tried this piece of code on playground but it doesnt

Answer 1

Use this function for date conversion , its working fine when your device in 24/12 hr formate

func convertDateFormater(fromFormate:String,toFormate:String,_ dateString: String) -> String{
    let formatter = DateFormatter()
    formatter.locale = NSLocale(localeIdentifier: "en_US_POSIX") as Locale
    formatter.dateFormat = fromFormate
    let date = formatter.date(from: dateString)
    formatter.dateFormat = toFormate
    return  date != nil ? formatter.string(from: date!) : ""
}