To the button enum, add a method named toUIBarButtonItem that returns an instance of UIBarButton item configured properl

Question

To the button enum, add a method named toUIBarButtonItem that returns an instance of UIBarButton item configured properly.

In the buttons.swift file there is a basic implementation of UIBarButtonItem. You can create buttons with three different styles and titles.

Using the associated values as titles for the button, return a button with style UIBarButtonStyle.Done for the Done member of the Button enum. Similarly for the Edit member, return a UIBarButtonItem instance with the style set to UIBarButtonStyle.Plain.

In both cases you can pass nil for target and action. Once you have a method, call it on the value we created in the previous task and assign it to a constant named doneButton.

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() -> UIBarButton {

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

Answer 1 · 2016-03-05T09:27:11Z

March 5, 2016 9:27am

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

    func toUIBarButtonItem() -> UIBarButtonItem {  //function requested in Task 2
      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)
      }
    }
}

let done = Button.Done("Done")                     //Task 1
let doneButton = done.toUIBarButtonItem()          //last step in Task 2

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Junaid Shaikh

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To the button enum, add a method named toUIBarButtonItem that returns an instance of UIBarButton item configured properl

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jcorum

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