Advanced Catalyst Example

This is an example of a Catalyst app using a three-column layout, with a primary toolbar.

It includes topics such as:

• Drag & drop reordering of the sidebar items
• Scaling UI metrics between Mac Idiom and iPad Idiom
• Using Codable to load a data store from disk and present it
• Using an AppKit bundle to access APIs not available to Catalyst, like NSSearchToolbarItem
• Mixing a SwiftUI detail view into a UIKit app structure
• Using the UIKit Focus Engine to provide keyboard navigation
• Providing a Credits file for your About window

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