Enums with data in swift

enums, swift

Solution

you can do something like this, which may be helpful: (that is a very generic example only)

enum Country : Int {
    case Moldova, Botwana;

    //

    func capital() -> String {
        switch (self) {
        case .Moldova:
            return "Chișinău"
        case .Botwana:
            return "Gaborone"
        default:
            return ""
        }
    }

    //

    func flagColours() -> Array<UIColor> {
        switch (self) {
        case .Moldova:
            return [UIColor.blueColor(), UIColor.yellowColor(), UIColor.redColor()]
        case .Botwana:
            return [UIColor.blueColor(), UIColor.whiteColor(), UIColor.blackColor()]
        default:
            return []
        }
    }

    //

    func all() -> (capital: String, flagColours: Array<UIColor>) {
        return (capital(), flagColours())
    }

    //

    var capitolName: String {
    get {
        return capital()
    }
    }

    //

    var flagColoursArray: Array<UIColor> {
    get {
        return flagColours()
    }
    }

}

then you can access to the details like this:

let country: Country = Country.Botwana

get the capital

that way:

let capital: String = country.capital()

or another:

let capital: String = country.all().capital

or a third one:

let capital: String = country.capitolName

get the flag's colours:

that way:

let flagColours: Array<UIColor> = country.flagColours()

or another:

let flagColours: Array<UIColor> = country.all().flagColours

or a third one:

let flagColours: Array<UIColor> = country.flagColoursArray

Problem

I would like to use java-like enums, where you can have enum instances with custom data. For instance: ``` enum Country { case Moldova(capital: "Chișinău", flagColors: [Color.Blue, Color.Yellow, Color.Red]); case Botswana(capital: "Gaborone", flagColors: [Color.Blue, Color.White, Color.Black]); } ``` I could later write: ``` Country.Moldova.capital; ``` It seems that I can indicate the variables, but not the values, and I can only assign the values when using the enum, not declaring. Which would be the best way to mimic this behaviour?

Original source