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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Shawn Tsou
Shawn Tsou
Courses Plus Student 2,281 Points


Read through multiple answers, it still gives this same error

I'm getting an error of "make sure you assign the results of the expression to a constant named doneButton", but in the description, it doesn't states that we need to assign the results to a doneButton variable. I have tried both done and doneButton, but nothing seems to work. I'm assuming team tree house needs to update the task.


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 done = done.button()

1 Answer

Jennifer Nordell
Jennifer Nordell
Treehouse Teacher

Hi there, Shawn Tsou ! You are so incredibly close here. In fact, you're only off by one word. This bummer! message is a bit odd, I know. But that could be because your code doesn't compile anymore. You are re-declaring an already declared variable named done. And while the Bummer! message says doneButton, the instructions say that the constant should be named button and that is accurate. Take a look at the last line, which is the only part you're missing:

let button = done.button()

Hope this helps! :sparkles:

Shawn Tsou
Shawn Tsou
Courses Plus Student 2,281 Points

Thank you so much, Jennifer. I figured the bug after a short walk in the end. I guess I was just too tired / frustrated to realize that. XD