// ViewController.swift let validator = Validator()

override func viewDidLoad() {	super.viewDidLoad()	// Validation Rules are evaluated from left to right.	validator.registerField(fullNameTextField, rules: [RequiredRule(), FullNameRule()])	// You can pass in error labels with your rules	// You can pass in custom error messages to regex rules (such as ZipCodeRule and EmailRule)	validator.registerField(emailTextField, errorLabel: emailErrorLabel, rules: [RequiredRule(), EmailRule(message: "Invalid email")])	// You can validate against other fields using ConfirmRule	validator.registerField(emailConfirmTextField, errorLabel: emailConfirmErrorLabel, rules: [ConfirmationRule(confirmField: emailTextField)])	// You can now pass in regex and length parameters through overloaded contructors	validator.registerField(phoneNumberTextField, errorLabel: phoneNumberErrorLabel, rules: [RequiredRule(), MinLengthRule(length: 9)])	validator.registerField(zipcodeTextField, errorLabel: zipcodeErrorLabel, rules: [RequiredRule(), ZipCodeRule(regex : "\\d{5}")])	// You can unregister a text field if you no longer want to validate it	validator.unregisterField(fullNameTextField) }

@IBAction func signupTapped(sender: AnyObject) {	validator.validate(self) }

// ValidationDelegate methods func validationSuccessful() {	// submit the form } func validationFailed(_ errors:[(Validatable ,ValidationError)]) { // turn the fields to red for (field, error) in errors { if let field = field as? UITextField { field.layer.borderColor = UIColor.red.cgColor field.layer.borderWidth = 1.0 } error.errorLabel?.text = error.errorMessage // works if you added labels error.errorLabel?.isHidden = false } }

// Don't forget to use UITextFieldDelegate // and delegate yourTextField to self in viewDidLoad() func textFieldShouldReturn(textField: UITextField) -> Bool { validator.validateField(textField){ error in if error == nil { // Field validation was successful } else { // Validation error occurred } } return true }

class SSNVRule: RegexRule { static let regex = "^\\d{3}-\\d{2}-\\d{4}$" convenience init(message : String = "Not a valid SSN"){ self.init(regex: SSNVRule.regex, message : message) } }