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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Posted by Bob Walters
Bob Walters
1,969 Points

Enum issue & don't understand error msgs

The error msgs they keep telling me to assign different things.

E.g., they have suggested that I assign to a constant named "done", "doneButton", and "button". It's a moving target as I comply with the previous one! :(

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 thisTitle):
            return UIBarButtonItem(title: thisTitle, style: .done, target: nil, action: nil)
        case .edit(let thisTitle):
            return UIBarButtonItem(title: thisTitle, style: .plain, target: nil, action: nil)
        }
    }
}

let button = BarButton.done(title: "Save").button()

1 Answer

Dhanish Gajjar
Dhanish Gajjar
20,185 Points
Dhanish Gajjar
Dhanish Gajjar
20,185 Points

In the first task you create an instance of Barbutton type .done and assign it to a constant done.

In the second, you simply call the method button() on the constant created earlier, and assign it to a new constant called button.

Hope it helps !

let done = BarButton.done(title: "Save")
let button = done.button()
Bob Walters
Bob Walters
1,969 Points

thnx!