UITextField+TextRange

extension UITextField {
    
    func textRange(from range: NSRange) -> UITextRange? {
        guard
            let startPosition = position(from: beginningOfDocument, offset: range.location),
            let endPosition = position(from: startPosition, offset: range.length) else {
                return nil
        }
        return textField.textRange(from: startPosition, to: endPosition)
    }
}