Creating the iOS List Screenlet's Delegate

Recall that a delegate is required if you want other classes to respond to your Screenlet’s actions. Create your delegate by following the first step in the tutorial on adding a Screenlet delegate. A list Screenlet’s delegate must also define a method for responding to a list item selection. For example, Bookmark List Screenlet’s delegate needs the following methods:

• screenlet(_:onBookmarkListResponse:): Returns the Bookmark results when the server call succeeds.
• screenlet(_:onBookmarkListError:): Returns the NSError object when the server call fails.
• screenlet(_:onBookmarkSelected:): Returns the Bookmark when a user selects it in the list.

The BookmarkListScreenletDelegate protocol defines these methods:

@objc public protocol BookmarkListScreenletDelegate : BaseScreenletDelegate {

    optional func screenlet(screenlet: BookmarkListScreenlet,
                            onBookmarkListResponse bookmarks: [Bookmark])

    optional func screenlet(screenlet: BookmarkListScreenlet,
                            onBookmarkListError error: NSError)

    optional func screenlet(screenlet: BookmarkListScreenlet,
                            onBookmarkSelected bookmark: Bookmark)

}

Nice work! Next, you’ll create the Screenlet class.

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