Swift VisionOS发送通知

您错过了delegate，并且告诉UNUserNotificationCenter如何在前台显示通知.

extension NotificationManager:  UNUserNotificationCenterDelegate {
    
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification) async -> UNNotificationPresentationOptions {
        .banner
    }
}

其余的manager个看起来像.

@Observable final class NotificationManager: NSObject {
    private(set) var isPermissionGranted = false
    let userNC = UNUserNotificationCenter.current()
    
    override init() {
        super.init()
        userNC.delegate = self
    }
    
    func sendNotifications() async throws {
        let id = UUID().uuidString
        
        let content = UNMutableNotificationContent()
        content.title = "Let's feed the cat"
        content.subtitle = "It looks hungry"
        
        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)
        let request = UNNotificationRequest(identifier: id,content: content,trigger: trigger)
        try await userNC.add(request)
        print("\(#function) :: scheduled")
    }
    
    func requestAuthorization () async throws {
        do {
            isPermissionGranted = try await userNC.requestAuthorization(options: [.alert, .badge, .sound])
        } catch {
            print(error)
        }
    }
    
    func cancelAll() {
        userNC.removeAllPendingNotificationRequests()
    }
}

请注意，您应该在应用程序的最顶端使用创建manager

@State private var manager: NotificationManager = .init()

并将其注入应用程序，

.environment(manager)

所以你可以在任何地方访问它，

@Environment(NotificationManager.self) private var manager

重要的是，delegate是稳定的，这样应用程序就不会错过通知.

这是View个样品

import SwiftUI
import RealityKit
import UserNotifications

struct NotificationSample: View {
    @Environment(NotificationManager.self) private var manager
    @State private var date: Date?
    @State private var isScheduling: Bool = false
    var body: some View {
        
        RealityView { content, attchments in
            guard let attachment = attchments.entity(for: "Feed") else {return}
            content.add(attachment)
        } update: { content, attchments in
            
        } attachments: {
            Attachment(id: "Feed") {
                VStack {
                    if let date {
                        Text(date, style: .timer)
                    }
                    Button("FEED THE CAT") {
                        isScheduling.toggle()
                    }.task(id: isScheduling) {
                        guard isScheduling else {return}
                        do {
                            try await manager.sendNotifications()
                        } catch {
                            print(error)
                        }
                        isScheduling = false
                        date = Calendar.current.date(byAdding: .minute, value: 1, to: Date())
                    }.disabled(!manager.isPermissionGranted)
                }
            }
        }
        .task {
            do {
                try await manager.requestAuthorization()
            } catch {
                print(error)
            }
            manager.cancelAll()
        }
        
    }
}