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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Vansh Agarwal
PLUS
Vansh Agarwal
Courses Plus Student 3,965 Points
Posted by Vansh Agarwal
Vansh Agarwal
Courses Plus Student 3,965 Points

Can someone help me with this code challenge?

I don't know what's the problem. Please help me out, thanks!

buttons.swift 
// Example of UIBarButtonItem instance
// let someButton = UIBarButtonItem(title: "A Title", style: .plain, target: nil, action: nil)
enum UIBarButtonStyle{
  case done
  case style
}
class UIBarButtonItem{
  let title: String
  let style: UIBarButtonStyle
  let target: Int
  let action: Int
  init (title: String, style: UIBarButtonStyle, target: Int, action: Int){
  self.title = title
  self.style = style
  self.target = target
  self.action = action
  }
}
enum BarButton {
    case done(title: String)
    case edit(title: String)

    func button() -> UIBarButtonItem{
    switch self {
    case .done(let title): return UIBarButton(title: title, style: UIBarButtonStyle.done, target: nil, action: nil)
    case .edit(let title): return UIBarButton(title: title, style: UIBarButtonStyle.plain, target: nil, action: nil)
    }
    }
}
let done = BarButton.done(title: "Save")
let button = done.button()

2 Answers

Leticia Rodríguez
.a{fill-rule:evenodd;}techdegree
Leticia Rodríguez
iOS Development with Swift Techdegree Student 3,455 Points

Hi!

It's not necessary to create UIBarButtonItem class nor the UIBarButtonStyle's enum.

Class UIBarButtonItem is already provided by swift when you import UIKit class.

All you need to do is call the init method in each case of switch statement, like it follows:

enum BarButton {
    case done(title: String)
    case edit(title: String)

    func button() -> UIBarButtonItem{
        switch self {
        case .done(let title): return UIBarButtonItem(title: title, style: .done, target: nil, action: nil)
        case .edit(let title): return UIBarButtonItem(title: title, style: .plain, target: nil, action: nil)
        }
    }
}

let done = BarButton.done(title: "Save")

And then invoke the method button:

let button = done.button()

The letter of this exercise was a little confusing to me too! Hope it helps!

jc laurent
jc laurent
6,351 Points
jc laurent
jc laurent
6,351 Points

nobody is asking you to create a class, UIbarbutton enum + a function and tons of code etc...

work with the code provide and the instructions pls