ApplicationDelegateAdaptor.swift

import SwiftUI

@main
struct ios14_demoApp: App {

    @UIApplicationDelegateAdaptor private var appDelegate: AppDelegate

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        return true
    }
    //No callback in simulator -- must use device to get valid push token
    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        
    }
    
    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
        
    }
    
    func applicationWillResignActive(_ application: UIApplication) {
        //inactive
    }
    
    func applicationDidEnterBackground(_ application: UIApplication) {
        //Background
    }
    
    func applicationWillEnterForeground(_ application: UIApplication) {
        //Foreground
    }
    
    func applicationDidBecomeActive(_ application: UIApplication) {
        //Active
    }
    
    func applicationWillTerminate(_ application: UIApplication) {
        //Terminate
    }
}