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iOS Swift 2.0 Enumerations and Optionals Introduction to Enumerations Enum Methods

Paul Je
Paul Je
4,435 Points
Posted by 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
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()