TextField limit enter string length

textFieldDelegate

    // TextField
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        guard let textFieldText = textField.text,
              let rangeOfTextToReplace = Range(range, in: textFieldText) else {
                  return false
              }
        let substringToReplace = textFieldText[rangeOfTextToReplace]
        let count = textFieldText.count - substringToReplace.count + string.count
        
        return count <= 10
    }

limit for 10 digit enter for example usage