Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enum Methods

Can't get past enums.

I have tried numerous solutions. Don't understand "initializer" comment in preview. Have worked over two hours.

import Foundation

enum UIBarButtonStyle {
    case Done
    case Plain
    case Bordered

class UIBarButtonItem {

    var title: String?
    let style: UIBarButtonStyle
    var target: AnyObject?
    var action: Selector

    init(title: String?, style: UIBarButtonStyle, target: AnyObject?, action: Selector) {
        self.title = title
        self.style = style
        self.target = target
        self.action = action
enum Button {
    case Done(title: String)
    case Edit(title: String)

    func toUIBarButtonItem() -> UIBarButtonItem {
       switch self {
        case .Done (let titleValue):
          return UIBarButtonItem(title: titleValue, style: UIBarButtonStyle.Done, target: nil, action: nil)
        case .Edit (let titleValue):
          return UIBarButtonItem(title: titleValue, style: UIBarButtonStyle.Plain, target: nil, action: nil)



let done = Button.Done(title: "Done")
let doneButton : UIBarButtonItem = Button(done)

1 Answer

Steven Deutsch
Steven Deutsch
21,046 Points

Hey Erin Krentz,

You're SO close!!! The only problem is with your call of the method. You need to call the method toUIBarButtonItem on done and assign it to the constant doneButton.

let doneButton = done.toUIBarButtonItem()

And that's it. The fix is as simple as that! This was a really hard challenge, I had a lot of trouble even getting to the point you got to myself!

Good Luck!