this is a little to much can i get help with this enum task

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 () ->  {

    }
}

let done = Button.Done("Done")

Answer 1 · 2016-04-18T17:25:33Z

April 18, 2016 5:25pm

You did the first task correctly, so I'll focus on the second task.

The second task provides you with the class UIBarButtonItem and the enum UIBarButtonStyle. UIBarButtonItem has an init method that takes in title of type String?, style of type UIBarButtonStyle, target of type AnyObject?, and action of type Selector. The task tells you to set target and action to nil, so you only need to worry about title and style.

In the enum Button, you are asked to create a method that returns a UIBarButtonItem based on the value the enum takes on. This means you need to switch on self to create the UIBarButtonItem and return it.

For the title parameter of UIBarButtonItem, you are asked to use the associated value for the case in Button (e.g., the String "Done" in the Button you assigned to the constant done for task 1).

For the style parameter, you are asked to use a value from UIBarButtonStyle (i.e., the .Done value for the case of .Done in Button, and the .Plain value for the case of .Edit in Button).

Hope this helps!

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Billy Potts

Billy Potts

this is a little to much can i get help with this enum task

1 Answer

Anjali Pasupathy

Anjali Pasupathy