I don't really understand the task. What is UIBarButtonItem and where do I get it from?

Question

What am I actually returning? Am i converting a BarButton enum to a usable button? I have not started on UI tracks yet, and have not seen the UIBarButtonItem class before.
My code does not compile either, but I fell I shouldn't try to fix it without understanding what I'm doing
```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 self{
case .done: return UIBarButtonStyle.done 
case .edit: return UIBarButtonStyle.plain

}

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

Jari Koopman · Accepted Answer

Hi Svein,
For this example, it doesn't really matter what a UIBarButtonItem is and what it does. But if you'd like to read about it, here are the links to the docs (https://developer.apple.com/documentation/uikit/uibarbuttonitem). As far as the challenge is considered, what you're asked to do is create a function, button() for the enum, that returns a UIBarButtonItem instance. You can see how to create one in the comment in the code. Next to that, you have to set the style of the button dependant on your BarButton case. So, you could approach this something like this:
swift
func button() -> UIBarButtonItem {
    switch self {
        case .done:
            //Return a UIBarButtonItem with `UIBarButtonStyle.done` style
        case .edit:
            //Return a UIBarButtonItem with `UIBarButtonStyle.plain` style
    }
}

I'll leave the exact implementation to you, but I think this should be a good nudge in the right direction!
Hope this helped,
Regards,
Jari

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Svein Bruce

Svein Bruce

I don't really understand the task. What is UIBarButtonItem and where do I get it from?

1 Answer

Jari Koopman

Jari Koopman