SwiftUI: AppDelegate on MacOS

Question

I'm porting a SwiftUI iOS app to macOS. It uses the @UIApplicationDelegateAdaptor property wrapper to bind a UIApplicationDelegate class. Unfortunately, the UIApplicationDelegate class isn't available on macOS, so I'm wondering how I bind my custom AppDelegate.

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
    ...
    }
}

struct MyApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    var body: some Scene {
        ...
    }
}

Answer 1

The macOS equivalent has the NS prefix

import AppKit

class AppDelegate: NSObject, NSApplicationDelegate {

...

@NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

and the DidFinishLaunching delegate method has a different signature

func applicationDidFinishLaunching(_ aNotification: Notification) [ ...