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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Chigozie Ofodike
Chigozie Ofodike
11,197 Points
Posted by Chigozie Ofodike
Chigozie Ofodike
11,197 Points

Hi there. Can I get some help?

It's saying i didnt have a default case even though i used an enum. Also I assigned done.button() to the constant doneButton yet it's saying it hasnt been done. What am I doing wrong? Also for the enum i did this " default: return UIBarButtonItem(title: "edit", style: .plain, target: nil, action: nil) } " to get rid of the error code but shouldnt it be automatic?

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

2 Answers

Xavier D
PLUS
Xavier D
Courses Plus Student 5,840 Points
Xavier D
Xavier D
Courses Plus Student 5,840 Points

Hey Chigozie,

Everything looks right except the cases of your switch--you need to fix that. The compiler is asking for a default clause because it think that you didn't include all the cases in self--and you didn't.

.done isn't the same as .done(title: "done") .edit isn't the same as .edit(title: "edit")

The compilers believes that you weren't exhaustive because you left out a couple of cases.