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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

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

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.