checking validation of whitespace on string - swift

Question

Inputting a value with 2 spaces and a string would enable the button " test"
but my code already detects " " whitespaces where the button is disabled but adding additional string on the whitespace enables the button
func validateAccountName(with accountName: String) -> Bool {
let regex = "[^A-Za-zA-O-o-y]"
let accountName = accountName.replacingOccurrences(of: " ", with: "")
return accountName.isEmpty == false && accountName.range(of: regex, options: .regularExpression) == nil
}
func edited() {
// check user input and allow update button to be enabled
guard let inputText = textField.text, let viewModel = viewModel else {
return
}
if !inputText.isEmpty
&& inputText != viewModel.accountName
&& viewModel.validateAccountName(with: inputText) {
self.navigationItem.rightBarButtonItem?.isEnabled = true
} else {
self.navigationItem.rightBarButtonItem?.isEnabled = false
}
}

Answer 1

Well what do you want to achieve?
If the goal is to reject everything that has any whitespaces you can use:
accountName.rangeOfCharacter(from: .whitespaces) == nil
But your regex already checks this as only Characters A-Z, a-z, A-O, - and o-y are allowed.
Maybe this is already what you want?
func validateAccountName(with accountName: String) -> Bool {
let regex = "[^A-Za-z]"
return accountName.range(of: regex, options: .regularExpression) == nil
}