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iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enum Methods

Ryan Maneo
Ryan Maneo
4,342 Points


I'm so lost right now. I am googling like crazy to understand what its asking me to do. I had no problem with pt. 1 of the code challenge, but now theres so many tasks that as soon as I think I know how to do one thing I forget another and vise versa. Should I re-take this entire course or even go back a few courses and re-take them? Or continue as is?

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
enum Button {
    case Done(String)
    case Edit(String)

    func toUIBarButtonItem() -> UIBarButtonItem.title {

    return button(UIBarButtonStyle.Done)

let done = Button.Done("Done")

1 Answer

Ryan, don't feel bad if you need to review a video. I'm sure we've all done that more than once!

But it might help if you just go through this line by line.

enum Button {
    case Done(String)
    case Edit(String)
    case Bordered(String)

    func toUIBarButtonItem() -> UIBarButtonItem {
        switch self {
        case .Done(let doneValue):
            return UIBarButtonItem(title: doneValue, style: UIBarButtonStyle.Done, target: nil, action: nil)
        case .Edit(let editValue):
            return UIBarButtonItem(title: editValue, style: UIBarButtonStyle.Plain, target: nil, action: nil)
        case .Bordered(let borderValue):  //not in challenge
            return UIBarButtonItem(title: borderValue, style: UIBarButtonStyle.Plain, target: nil, action: nil)
let done = Button.Done("Done")
let doneButton = done.toUIBarButtonItem()

The enum in the challenge only had two cases, but I added the third, just to be complete. The editor doesn't mind.