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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Baran Ozkan
Baran Ozkan
8,818 Points

Question is not clear

I'm not sure if the class is already created for us or not. The question is blurry. I have done everything from scratch but it still doesn't compile. Works well on Xcode. Here is what I compiled:

enum UIBarButtonStyle { case done case plain }

class UIBarButtonItem { var title: String = "A Title" var style: UIBarButtonStyle = .plain var target: String? = nil var action: String? = nil

init (title: String, style: UIBarButtonStyle, target: String?, action: String?) {
    self.title = title
    self.style = style
    self.target = target
    self.action = action


When I delete the enum and the class, it still doesn't compile. What am I missing?

// 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 self {
        case .done(let title1): return UIBarButtonItem(title: title1, style: UIBarButtonStyle.done, target: nil, action: nil)
        case .edit(let title2): return UIBarButtonItem(title: title2, style: UIBarButtonStyle.plain, target: nil, action: nil)
let done = BarButton.done(title: "Save")
let button = done.button()