validation.swift

class SunilValidation : Validation {

    // 8 characters. one uppercase, one lowercase, one number
    var SUNIL_REGEX = "^(?=.*?[A-Z])(?=.*?[0-9])(?=.*?[a-z]).{8,}$"
    // No length. one uppercase, one lowercase, one number
    var NO_LENGTH_SUNIL_REGEX = "^(?=.*?[A-Z])(?=.*?[0-9])(?=.*?[a-z]).*$"
    
    func validate(value: String) -> (Bool, ValidationErrorType) {
        if let sunilTest = NSPredicate(format: "SELF MATCHES %@", SUNIL_REGEX) {
            if sunilTest.evaluateWithObject(value) {
                return (true, .NoError)
            }
            return (false, .Password) // You will need to add a ValidationRuleType and ValidationErrorType
        }
        return (false, .Password)
    }
}