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iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enum Methods

Michael Murray
Michael Murray
6,037 Points
Posted by Michael Murray
Michael Murray
6,037 Points

Getting a compile error. Says, " Enums may not contain stored properties". Please help.

// Challenge was broken ito two files: // buttons.swift file below and enums.swift file further below.

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 file

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

func toUIBarButtonItem() -> UIBarButtonItem {
    switch self {
    case Button.Done:
        return UIBarButtonItem(title: "Done", style: .Done, target: nil, action: nil )

    case Button.Edit:
    return UIBarButtonItem(title: "Edit", style: .Plain, target: nil, action: nil )
}

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

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 {
        switch self {
        case Button.Done:
            return UIBarButtonItem(title: "Done", style: .Done, target: nil, action: nil )

        case Button.Edit:
        return UIBarButtonItem(title: "Edit", style: .Plain, target: nil, action: nil )
    }
}
let done = Button.Done("Done")
let doneButton = done.toUIBarButtonItem()

2 Answers

Michael Murray
Michael Murray
6,037 Points
Michael Murray
Michael Murray
6,037 Points

Found it myself. I was missing a close bracket for the switch statement!

Alexander Smith
Alexander Smith
10,476 Points
Alexander Smith
Alexander Smith
10,476 Points

This one was really tough needed a little refresher. Model it like this and it should be good.

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()
Michael Murray
Michael Murray
6,037 Points
Michael Murray
Michael Murray
6,037 Points

I added in the (let title) as you suggested (both places), but I still the compile error " enums may not contain stored properties" -referring to the following line of code: let done = Button.Done("Done")

Alexander Smith
Alexander Smith
10,476 Points
Alexander Smith
Alexander Smith
10,476 Points

should work. try refreshing the challenge and copy paste my answer. dont alter anything else in the code either. I just tried it and it worked for me