Validation Methods + Expiration Date Year Length + Separator Style

[carmelogallo]

Hi guys, congratulation so far!

Validation Methods:
I just wanted to tell you to if you can add a method which return a boolean if the credit card number, expiration date and cvv is in a valid format. I created it subclassing your class but would be better if you can add it directly in your code ;) Here the code:

    func isValidCCNumber() -> Bool {

        let ccNumberRegex = "^(([0-9]{4})[-|\\s| ]([0-9]{4})[-|\\s| ]([0-9]{4})[-|\\s| ]([0-9]{4}))|(([0-9]{4})[-|\\s| ]([0-9]{6})[-|\\s| ]([0-9]{5}))"
        let ccNumberPredicate = NSPredicate(format:"SELF MATCHES %@", ccNumberRegex)
        return ccNumberPredicate.evaluateWithObject(self.text!)
    }

    func isValidCCEpirationDate() -> Bool {

        let ccExpirationDateRegex = "(?:0[1-9]|1[0-2])\\/2[0-9]{3}"
        let ccExpirationDatePredicate = NSPredicate(format:"SELF MATCHES %@", ccExpirationDateRegex)
        return ccExpirationDatePredicate.evaluateWithObject(self.text!)
    }

    func isValidCCCvv() -> Bool {

        let ccCvvRegex = "^([0-9]{3,4})$"
        let ccCvvPredicate = NSPredicate(format:"SELF MATCHES %@", ccCvvRegex)
        return ccCvvPredicate.evaluateWithObject(self.text!)
    }

Expiration Date Year Length:
In my app I need to use 4 digit number in the textfield but actually your code allow just 2. Would be better if you can let the user decide the length.

Separator Style:
In your app you automatically add the separation in the credit card number, which is an whitespace, and in the cvv, which is an " / ". Would be better if you can let the user decide them.

Hope you'll include them ;)

Cheers,
Carmelo