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iOS Enumerations and Optionals in Swift Introduction to Enumerations Enum Methods

Posted by Disha Mohta
Disha Mohta
2,248 Points

What's missing?

Error suggests I should assign the expression to a constant : doneButton

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

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

  func toUIBarButtonItem() -> UIBarButtonItem {
    switch self {
    case .Done(let str): return UIBarButtonItem(title: str, style: .Done, target: nil, action: nil)
    case .Edit(let str): return UIBarButtonItem(title: str, style: .Plain, target: nil, action: nil)
    }
  }
}

let done = Button.Done("Done")
let doneButton = done.toUIBarButtonItem()