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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Yuqing Lu
Yuqing Lu
7,032 Points
Posted by Yuqing Lu
Yuqing Lu
7,032 Points

what is missing in my code.

the error message as below: swift_lint.swift:53:57: error: type 'UIBarButtonItem' has no member 'done' return UIBarButtonItem(title: title, style: UIBarButtonItem.done, target: nil, action: nil) ^~~~~~~~~~~~~~~ ~~~~ swift_lint.swift:55:57: error: type 'UIBarButtonItem' has no member 'plain' return UIBarButtonItem(title: title, style: UIBarButtonItem.plain, target: nil, action: nil) ^~~~~~~~~~~~~~~ ~~~~~

does that mean I need import any framework first?

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

1 Answer

Jason Anders
MOD
Jason Anders
Treehouse Moderator 145,860 Points
Jason Anders
Jason Anders
Treehouse Moderator 145,860 Points

Hey there,

You're on the right track, but .done and .plain are members of BarButton not UIBarButtonItem. So, it's really a simple fix: Just delete UIBarButtonItem and leave just the member. Because you are in the Enum, you just need .done and .plain.

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)

Keep coding! :) :dizzy: