handlepushSwiftui.swift

import SwiftUI

@main
struct ios14DemoApp: App {
    @StateObject var notificationCenter = NotificationCenter()

    var body: some Scene {
        WindowGroup {
            LocalNotificationDemoView(notificationCenter: notificationCenter)
        }
    }
}

class NotificationCenter: NSObject, ObservableObject {
    override init() {
        super.init()
        UNUserNotificationCenter.current().delegate = self
    }

    // didReceive hook
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse,  withCompletionHandler completionHandler: @escaping () -> Void) {
        // ...
    }
}

struct LocalNotificationDemoView: View {
    @ObservedObject var notificationCenter: NotificationCenter
    
    var body: some View {
        Button("schedule Notification") {
            // UNUserNotificationCenter.current().add(...)
        }
    }
}