iOS Simulator never receives notifications from CloudKit server

Question

Important note: The question is not about simulating notifications, it's about receiving real notifications from CloudKit server and get working sync.

Notifications on Simulator never fires, even when app is launched, I just cannot test my app well. Specifically I've subscribed on CKDatabaseSubscription. Anyone knows how to allow notifications on Simulator to get working sync?

I receive notifications only on real device and have working sync, it works perfect there.

func subscriptionToNotifications(for container: CKContainer) {
    if subscriptionIsLocallyCached { return }
    
    let application = UIApplication.shared
    let sharedDatabase = container.sharedCloudDatabase
    
    let subscription = CKDatabaseSubscription(subscriptionID: "shared-changes")
    subscription.recordType = "CD_List"
    
    let notificationInfo = CKSubscription.NotificationInfo()
    notificationInfo.shouldSendContentAvailable = true
    notificationInfo.shouldBadge = true
    notificationInfo.alertBody = "Task list was changed"
    notificationInfo.soundName = "default"
    
    subscription.notificationInfo = notificationInfo;
    
    /// Saving subscription to Shared Database
    container.sharedCloudDatabase.save(subscription) { (subscription, error) in
        if let error = error {
            print("Error saving subscription:\n", error.localizedDescription)
        } else if let subscription = subscription {
            print("Successfully saved Subscription:\n", subscription.debugDescription)
        }
    }
    
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in
        if let error = error {
            print("Error registering notifications authorization")
        } else if granted {
            print("Successfully authorized Notifications!")
        }
    }
    
    application.registerForRemoteNotifications()
    
    /// Creating operation which will notify when subscription will be saved
    let operation = CKModifySubscriptionsOperation(subscriptionsToSave: [subscription], subscriptionIDsToDelete: [])
    
    operation.modifySubscriptionsCompletionBlock = { [unowned self] subscriptions, subscriptionIDs, error in
        if let error = error {
            print("Error registering notifications authorization")
        } else {
            self.subscriptionIsLocallyCached = true
            print("Successfully modified subscriptions")
        }
    }
    
    operation.qualityOfService = .utility
    
    sharedDatabase.add(operation)
}

Answer 1

CloudKit notifications will not work most of the time on simulator, you should test on real device.