How do I access an enum from another class in Swift?

Question

Say I have the following example:

class ClassOne {
    enum Color {
        case Red
        case Blue
    }

    func giveColor() -> Color {
        return .Red
    }
}

class ClassTwo {
    let classOne = ClassOne()
    var color: Color = classOne.giveColor()
}

The compiler complains that it doesn't know what Color is in ClassTwo. How would I best handle this?

Answer 1

Your Color enumeration is a nested type -- you'll access it as ClassOne.Color. Moreover, you can't assign one property from another in the declaration like that. Leave it unassigned and do it in the init():

class ClassOne {
    enum Color {
        case Red
        case Blue
    }

    func giveColor() -> Color {
        return .Red
    }
}

class ClassTwo {
    let classOne = ClassOne()
    var color: ClassOne.Color

    init() {
        self.color = self.classOne.giveColor()
    }
}