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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Posted by Disha Mohta
Disha Mohta
2,248 Points

I don't know how to solve this

Not sure how to write the instance

buttons.swift 
// Example of UIBarButtonItem instance
// let someButton = UIBarButtonItem(title: "A Title", style: .plain, target: nil, action: nil)

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

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

}
let done = BarButton.done(title: "Save")
let doneButton = BarButton.button()

1 Answer

Michael Ayoub
Michael Ayoub
7,689 Points
Michael Ayoub
Michael Ayoub
7,689 Points 
enum BarButton {
    case done(title: String)
    case edit(title: String)

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

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

This challenge is glitchy and you need to add the associated values for the cases in the switch statement. And switch button won't work, you must use switch self (self refers to BarButton).