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    func checkFields() -> Bool{
        
        guard let ttfName = tfName.text, !ttfName.isEmpty else {
            return false
        }

        if vSelector.selected == 0 {
            guard let ttfEmail = tfEmail.text, !ttfEmail.isEmpty else {
                return false
            }
        }
        
        guard let ttfPassword = tfPassword.text, !ttfPassword.isEmpty else {
            return false
        }

        return true;
    }

if (textField.text && textField.text.length > 0) {
  //tiene datos
}