How to remove diacritics from a String in Swift?

Question

How to remove diacritics (or accents) from a String (like say change \"één\" to \"een\") in Swift? Do I have to go back to NSString or can it be do

Answer 1

Answer update for Swift 5.0.1

func toNoSmartQuotes() -> String {
    let userInput: String = self
    return userInput.folding(options: .diacriticInsensitive, locale: .current)
}

and use it someTextField.text.toNoSmartQuotes()