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Maxence Roy
8,753 PointsNeed help with enum method
Having a hard time with enums! Can you guide me for this challenge?
// 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(title: String) -> UIBarButtonItem {
switch self {
case .done: return UIBarButtonStyle.done
case .edit: return UIBarButtonStyle.plain
}
}
}
let done = BarButton.done(title: "Save")
4 Answers
Kayondo Martin
7,481 PointsI think the problem is with the return statements in the switch
something like
switch self {
case .done(let title): return UIBarButtonItem(title: title, style: UIBraButtonItemStyle.done, target: nil, action: nil)
case .edit(let title): return UIBarButtonItem(title: title, style: .plain, target: nil, action: nil)
}
the call it on the done constant initiated
let done = BarButton.done(title: "Save")
let button = done.button()
Maxence Roy
8,753 PointsSo this is the code that I've wrote based on your advice and this is what I came up with :
enum BarButton {
case done(title: String)
case edit(title: String)
func button(title: String) -> UIBarButtonItem {
switch self {
case .done(let title): return UIBarButtonItem(title: title, style: UIBarButtonItemStyle.done, target: nil, action: nil)
case .edit(let title): return UIBarButtonItem(title: title, style: UIBarButtonItemStyle.plain, target: nil, action: nil)
}
}
}
let done = BarButton.done(title: "Save")
let button = done.button(title: "Save")
It's not compiling, do you know why ?
Kayondo Martin
7,481 PointsIn case .edit, the style is .plain, not UIButtonItemStyle.plain
Maxence Roy
8,753 PointsHi Kayondo,
I made the change and it still does not compile :
enum BarButton {
case done(title: String)
case edit(title: String)
func button(title: String) -> UIBarButtonItem {
switch self {
case .done(let title): return UIBarButtonItem(title: title, style: UIBarButtonItemStyle.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")
let button = done.button(title: "Save")
Kayondo Martin
7,481 PointsI'm sorry, Max, I forgot to point out that the function takes no arguments...
fun button()->UIBarButton {
switch self {
case .done(let title): return UIBarButtonItem(title: title, style: UIBarButtonItemStyle.done, target: nil, action: nil)
case .edit(let title): return UIBarButtonItem(title: title, style: .plain, target: nil, action: nil)
}
}
Same as for declaring the constant button, please omit the argument like I did at first.
Maxence Roy
8,753 PointsThank you! It works.