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iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enum Methods

Paul Je
Paul Je
4,435 Points

Must be something really wrong here lol

Unsure as to the syntax I should use and not sure where I can begin the fix. Sorry for being a newb, hope somebody can help! Would really help for sure..

buttons.swift
import Foundation

enum UIBarButtonStyle {
    case Done
    case Plain
    case Bordered
}

class UIBarButtonItem {

    var title: String?
    let style: UIBarButtonStyle
    var target: AnyObject?
    var action: Selector

    init(title: String?, style: UIBarButtonStyle, target: AnyObject?, action: Selector) {
        self.title = title
        self.style = style
        self.target = target
        self.action = action
    }
}
enums.swift
enum Button {
    case Done(String)
    case Edit(String)

    func toUIBarButtonItem()-> UIBarButtonItem.Done {
   switch self {

    case target: nil
    case action: nil
    }
   }

    func toUIBarButtonItem() -> UIBarButtonStyle.Plain {
    switch self {

    case target: nil
    case action: nil
    }
   }
}

let done = Button.Done("Done")
let doneButton = Button.Done("Done")

1 Answer

Damien Watson
Damien Watson
27,419 Points

Hi Paul,

I didn't make any change to the 'buttons.swift', so listed below I have the 'enums.swift'.

You just need one method and inside the switch, you need to have a 'case' for each enum. Once you have identified which item, you then return the new UIBarButtonItem with the associated settings.

enum Button {
    case Done(String)
    case Edit(String)
    func toUIBarButtonItem() -> UIBarButtonItem {
      switch self {
        case .Done(let title):
          return UIBarButtonItem(title: title, style: UIBarButtonStyle.Done, target: nil, action: nil)
        case .Edit(let title):
          return UIBarButtonItem(title: title, style: UIBarButtonStyle.Plain, target: nil, action: nil)
      }
    }
}

let done = Button.Done("Done")
let doneButton = done.toUIBarButtonItem()