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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Bruce Röttgers
Bruce Röttgers
18,211 Points
Posted by Bruce Röttgers
Bruce Röttgers
18,211 Points

Need help with the method at exercise 2

Can't figure out what I have really to do in the method.

Error output (from Exercise): swift_lint.swift:51:15: error: enum case 'done' not found in type 'BarButton.Type' case .done: return UiBarButtonStyle.done ^ swift_lint.swift:51:28: error: use of unresolved identifier 'UiBarButtonStyle' case .done: return UiBarButtonStyle.done ^~~~~~~~~~~~~~~~ swift_lint.swift:27:7: note: did you mean 'UIBarButtonItem'? class UIBarButtonItem { ^ swift_lint.swift:22:6: note: did you mean 'UIBarButtonItemStyle'? enum UIBarButtonItemStyle : Int { ^ swift_lint.swift:52:15: error: enum case 'edit' not found in type 'BarButton.Type' case .edit: return UIBarButtonStyle.plain ^ swift_lint.swift:52:28: error: use of unresolved identifier 'UIBarButtonStyle' case .edit: return UIBarButtonStyle.plain ^~~~~~~~~~~~~~~~ swift_lint.swift:27:7: note: did you mean 'UIBarButtonItem'? class UIBarButtonItem { ^ swift_lint.swift:22:6: note: did you mean 'UIBarButtonItemStyle'? enum UIBarButtonItemStyle : Int { ^

buttons.swift 
// Example of UIBarButtonItem instance
// let someButton = UIBarButtonItem(title: "A Title", style: .plain, target: nil, action: nil)

enum BarButton {
    case done(title: String)
    case edit(title: String)

    func button() -> UIBarButtonItem {
      switch BarButton.self {
        case .done: return UiBarButtonStyle.done
        case .edit: return UIBarButtonStyle.plain
      }
    }
}

let done = BarButton.done(title: "Save")
let button = done.button()

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points 
enum BarButton {
    case done(title: String)
    case edit(title: String)

    func button() -> UIBarButtonItem{
        switch self {
        case .done(let title):
            return UIBarButtonItem(title: title, style: .plain, 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 doneButton = done.button()