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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Jordan Ward
Jordan Ward
2,395 Points
Posted by Jordan Ward
Jordan Ward
2,395 Points

Question need some help with

Hey guys, I don't understand why it is done.button and not button.done in the instance. Shouldn't we reference from the method first? I don't understand, any help would be great!

buttons.swift 
enum BarButton {
    case done(title: String)
    case edit(title: String)

    func button() -> UIBarButtonItem {
         switch self{
        case .done(let title): return UIBarButtonItem(title: title, style: .done, target: nil, action: nil)
        case .edit(let title): return UIBarButtonItem(title: title, style: .plain, target: nil, action: nil)
        }

    }
}

let done = BarButton.done(title: "Save") 
let button = done.button() 
//WHY is it done.button instead of button.done.    shouldnt we refrence from button.done

1 Answer

tromben98
tromben98
13,273 Points
tromben98
tromben98
13,273 Points

Hi Jordan!

I think that the reason for this is that the done case in the BarButton Enum contains the UIBarButtonItem. So in order to return a doneButton you must first access the .done type.