iOS: create a struct in swift with credentials

Question

I have to create a struct to check if two UITextField are valid. And my idea is this, is it a good way to create a struct?

struct Credentials{
func isCorrect() -> Bool {
    guard let username = emailTF.text else {
        return false
    }
    guard let password = passwordTF.text else {
        return false
    }

    return true
}

but I have some question:

• how can I pass the values of emailTextField and passwordTF inside the struct? with an init method?
• and is it better have some var or let inside the struct or is also a good idea have only a method inside a struct?

thanks

Answer 1

You can creare a struct like this

struct Credentials {
    let email: String
    let password: String

    init?(email:String?, password: String?) {
        guard let email = email, password = password else { return  nil }
        self.email = email
        self.password = password
    }

    var correct: Bool {
        // do your check
        guard email.isEmpty == false && password.isEmpty == false else { return false }
        return true
    }
}

As you can see correct is a computed property, non a function because it does't need any params.

Usage

let correct = Credentials(email: emailTF.text, password: passwordTF.text)?.correct == true