can you tell me how view controller works with swiftui menu

To understand how a view controller works with a SwiftUI menu, you can look into the integration of SwiftUI with AppKit and UIKit. Here are the key points:

1. SwiftUI Menus in AppKit:

   • You can use SwiftUI menus within AppKit contexts using NSHostingMenu, a new NSMenu subclass. This allows you to share menu definitions between parts of your app that use AppKit and those that use SwiftUI.
   • To create a menu, define it using a SwiftUI view in the body. Use SwiftUI views like toggles, pickers, and buttons to describe the data relationships.
   • Initialize an NSHostingMenu with the SwiftUI view and use it in any AppKit context that accepts an NSMenu, such as the new NSPopupButton initializer with a pull-down menu parameter.
   • For more details, you can refer to the session What’s new in AppKit.

2. SwiftUI and UIKit Integration:

   • If you want to use a view or view controller from UIKit in SwiftUI, you can create a UIViewRepresentable. This is a special SwiftUI view protocol for creating and updating an associated UIKit view using imperative code.
   • Conversely, to embed a SwiftUI view into a UIKit view hierarchy, you can use classes such as HostingViewController. This is created with a root SwiftUI view and can be added to your UIKit view controller hierarchy.
   • This interoperability allows you to adopt SwiftUI incrementally in your existing apps or build new SwiftUI apps that incorporate UIKit views.
   • For more details, you can refer to the session SwiftUI essentials.

3. SwiftUI Animations with UIKit and AppKit:

   • SwiftUI animations can be used to animate UIKit and AppKit views. This involves using NSAnimationContext or similar APIs to pass in a SwiftUI animation type and adjust your layout or drawing.
   • These animations are interruptible and retargetable, providing a powerful way to enhance your UI transitions.
   • For more details, you can refer to the session Enhance your UI animations and transitions.

Relevant Sessions

1. What’s new in AppKit
2. SwiftUI essentials
3. Enhance your UI animations and transitions

These sessions provide a comprehensive overview of how to integrate and use SwiftUI menus with view controllers in both AppKit and UIKit contexts.