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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Svein Bruce
Svein Bruce
7,162 Points
Posted by Svein Bruce
Svein Bruce
7,162 Points

Why won't my code compile? The error messages makes no sense.

I think i have done what the task asks for, even though some of it didn't make much sense. Why should i name the method the same as the constant?

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

1 Answer

Jialong Zhang
Jialong Zhang
9,821 Points
Jialong Zhang
Jialong Zhang
9,821 Points

If you write codes in the playground, make sure to import UIKit

enum BarButton {
    case done(title: String)
    case edit(title: String)
    func button() -> UIBarButtonItem{
        switch self{
        case .done(let title): return UIBarButtonItem(title: "A Bird", style: .done, target: nil, action: nil)
        case .edit(let title): return UIBarButtonItem(title: "A Bird", style: .plain, target: nil, action: nil)
        }
    }
}

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