Notifications

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Learn about the technical aspects of notification delivery on device, including notification types, priorities, and notification center management.

Notifications Documentation

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Push notification sent to uninstalled app
I am using push notification in my app. User token gets properly registered and is sent to server. Notification are also sent by server and recieved on device as expected. The problem occurs when user uninstalls the app. iOS does not provide any option to handle uninstall event. On top of that when server send notification to such device token APNS feedback service sends success message. Meaning APNS sends push notifications to uninstalled app.I have an API to unregister the device on server since no event is triggered I am unable to call it.Please suggest a way out.
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9k
May ’19
NSE Filtering
we already got access to com.apple.developer.usernotifications.filtering , we have set up this special permission in our app extension entitlement and provision profile. but we are still unable to filter notification by providing empty UNNotificationContent
7
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3.8k
Feb ’21
MainActor and NSInternalInconsistencyException: 'Call must be made on main thread'
Hello, When attempting to assign the UNNotificationResponse to a Published property on the main thread inside UNUserNotificationCenterDelegate's method func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse) async both Task { @MainActor in } and await MainActor.run are throwing a NSInternalInconsistencyException: 'Call must be made on main thread'. I thought both of them were essentially doing the same thing, i.e. call their closure on the main thread. So why is this exception thrown? Is my understanding of the MainActor still incorrect, or is this a bug? Thank you Note: Task { await MainActor.run { ... } } and DispatchQueue.main.async don't throw any exception.
5
5
3.9k
Jul ’22
APNs keep returning unregistered token
Hi, we've observed a weird behavior for a small amount of our user that we keep receiving the same token from APNs despite it's shown as Unregistered. When we try to send push to the token, we got an Unregistered error so we remove that token from our server. However, later we would receive an add token request from the client with the same token we just removed, and when we try to send to the token it returns Unregistered again so we remove the token again. This happened 3 times for a user in an hour. The identifierForVendor remains the same for all the requests. We also owns the client and I've checked client code that it's sending the token it received from didRegisterForRemoteNotificationsWithDeviceToken to the server.
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1.9k
Oct ’22
Regarding Delay/timed out issue of IOS push notifications
Dear Team, Hope You are dong good! Problem Description:- We are facing a huge delay in receiving IOS Push notifications on concerned devices. Found System.Timeout.Exception Error in IOS Logs(Screenshot & Recent Logs attached) Found a network delay between service installed servers & APNS(Apple Push Notification Service) Destination URL & Ports using in Push Notification service:- api.push.apple.com api.development.push.apple.com Destination Port-443 Also Found the error(TCP reset From server) between source(service installed server) & Destination (Apple Push Notification Service)-Screenshot attached Please have a look around the above  points & requesting advice regarding the below:- How to resolve this delay in reaching IOS push Notifications in concerned devices? Should we call more URL’s from services? If yes please provide URL’s/Ports to be opened from services ? Awaiting your Replies, Thanks,
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1.5k
Feb ’23
Push payload is not present on notification tap
I am checking if the user taps on the firebase push notification and get the payload. override func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) { let userInfo = response.notification.request.content.userInfo os_log("notification tapped %{public}@", log: OSLog.push, type: .info, userInfo) handleNotificationPayload(userInfo as! [String: AnyObject]) setFlutterLinkClickedVariable() } My use case is in app terminated state when push notification is tapped, get the link from payload and navigate to corresponding screen based on the link. This is working when there is only one push notification. When there are multiple push notifications with different links in the payload, only the first notification I tap works. Rest of the notifications just launches the app and does not navigate because the link is not set. I am getting the link from the payload and invoking flutter code which sets the link in the user defaults (shared preferences) and when the app launches in the home screen it checks for this variable and navigates accordingly. func handleNotificationPayload(_ payload: [String: AnyObject]) { if let link = payload["link"] as? String { setFlutterLinkVariable(link) } } override func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { os_log("app did receive remote notification %{public}@", log: OSLog.push, type: .info, userInfo) handleNotificationPayload(userInfo as! [String : AnyObject]) completionHandler(.newData) } Currently when there is only one push notification it works because the link is set from the above method. The click delegate is not calling. I did set the delegate in application(:didFinishLaunchingWithOptions). UNUserNotificationCenter.current().delegate = self application.registerForRemoteNotifications() How to solve this issue? Thanks.
2
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738
Jul ’23
UNNotificationServiceExtension Not Displaying Sender Image
I created a Notification Service Extension to display profile images in place for the app image (i.e. iMessage). I send a remote push notification via Firebase Functions, and in the payload, the relevant profile image url string. The profile image url string in the payload is successfully delivered as it appears in my console log and AppDelegate didReceiveRemoteNotification function. My problem is the profile image does not replace the default app icon image in the remote push notification. Below is my configuration. Any guidance would be appreciated! Main target app: the info plist contains NSUSerActivityTypes = [INSendMessageIntent]. The Communications Notifications capability is enabled and "Copy only when installing" in Build Phases Embed Foundation Extensions Notification Service Extension plist: contains NSExtension > NSExtensionAttributes > IntentsSupported > INSendMessageIntent. Notification Service Extension class code: var contentHandler: ((UNNotificationContent) -> Void)? var bestAttemptContent: UNMutableNotificationContent? override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) { self.contentHandler = contentHandler bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent) guard var bestAttemptContent = bestAttemptContent else { return } guard let fcmOptions = bestAttemptContent.userInfo["fcm_options"] as? [String: Any], let attachmentUrlAsString = fcmOptions["imageURL"] as? String else { contentHandler(bestAttemptContent) return } if let attachmentUrl = URL(string: attachmentUrlAsString) { var senderNameComponents = PersonNameComponents() senderNameComponents.nickname = bestAttemptContent.title let profileImage = INImage(url: attachmentUrl) let sender = INPerson(personHandle: INPersonHandle(value: "1233211234", type: .unknown), nameComponents: senderNameComponents, displayName: bestAttemptContent.title, image: profileImage, contactIdentifier: nil, customIdentifier: nil, isMe: false) let receiver = INPerson(personHandle: INPersonHandle(value: "1233211234", type: .unknown), nameComponents: nil, displayName: nil, image: nil, contactIdentifier: nil, customIdentifier: nil, isMe: true) let intent = INSendMessageIntent( recipients: [receiver], outgoingMessageType: .outgoingMessageText, content: "Test", speakableGroupName: INSpeakableString(spokenPhrase: "Sender Name"), conversationIdentifier: "sampleConversationIdentifier", serviceName: nil, sender: sender, attachments: nil ) intent.setImage(profileImage, forParameterNamed: \.sender) let interaction = INInteraction(intent: intent, response: nil) interaction.direction = .incoming interaction.donate(completion: nil) if #available(iOSApplicationExtension 15.0, *) { do { bestAttemptContent = try bestAttemptContent.updating(from: intent) as! UNMutableNotificationContent } catch { contentHandler(bestAttemptContent) return } } contentHandler(bestAttemptContent) } else { contentHandler(bestAttemptContent) return } } }
1
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1.1k
Sep ’23
Error when running Live Activities
Hi there, This is my first time posting here. I'm working on small projects on Swift and SwiftUI now and then. I'm currently trying to develop an application that gets some bus arrival data using API and displaying them with live activities. The thing is that I'm not quite sure how frequently updates work yet. Still trying to figure out if I can update the live activity everytime the data coming right from the API changes or use push notification updates each minute passing by, but that is another thread that I'm going to focus with more details. Everytime i'm trying to deploy my app on my iphone or a simulator this error keeps popping up and I can't figure out why. Any ideas? Let me know if you need any snippet of my code. SendProcessControlEvent:toPid: encountered an error: Error Domain=com.apple.dt.deviceprocesscontrolservice Code=8 "Failed to show Widget 'com.gregorikouk.MapKitTut.BusWidgetKit' error: Error Domain=FBSOpenApplicationServiceErrorDomain Code=1 "The request to open "com.apple.springboard" failed." UserInfo={NSLocalizedFailureReason=The request was denied by service delegate (SBMainWorkspace)., BSErrorCodeDescription=RequestDenied, NSUnderlyingError=0xb1282dfe0 {Error Domain=SBAvocadoDebuggingControllerErrorDomain Code=1 "Failed to get descriptors for extensionBundleID (com.gregorikouk.MapKitTut.BusWidgetKit)" UserInfo={NSLocalizedDescription=Failed to get descriptors for extensionBundleID (com.gregorikouk.MapKitTut.BusWidgetKit)}}, FBSOpenApplicationRequestID=0xe5da, NSLocalizedDescription=The request to open "com.apple.springboard" failed.}." UserInfo={NSLocalizedDescription=Failed to show Widget 'com.gregorikouk.MapKitTut.BusWidgetKit' error: Error Domain=FBSOpenApplicationServiceErrorDomain Code=1 "The request to open "com.apple.springboard" failed." UserInfo={NSLocalizedFailureReason=The request was denied by service delegate (SBMainWorkspace)., BSErrorCodeDescription=RequestDenied, NSUnderlyingError=0xb1282dfe0 {Error Domain=SBAvocadoDebuggingControllerErrorDomain Code=1 "Failed to get descriptors for extensionBundleID (com.gregorikouk.MapKitTut.BusWidgetKit)" UserInfo={NSLocalizedDescription=Failed to get descriptors for extensionBundleID (com.gregorikouk.MapKitTut.BusWidgetKit)}}, FBSOpenApplicationRequestID=0xe5da, NSLocalizedDescription=The request to open "com.apple.springboard" failed.}., NSUnderlyingError=0xb1281d830 {Error Domain=FBSOpenApplicationServiceErrorDomain Code=1 "The request to open "com.apple.springboard" failed." UserInfo={NSLocalizedFailureReason=The request was denied by service delegate (SBMainWorkspace)., BSErrorCodeDescription=RequestDenied, NSUnderlyingError=0xb1282dfe0 {Error Domain=SBAvocadoDebuggingControllerErrorDomain Code=1 "Failed to get descriptors for extensionBundleID (com.gregorikouk.MapKitTut.BusWidgetKit)" UserInfo={NSLocalizedDescription=Failed to get descriptors for extensionBundleID (com.gregorikouk.MapKitTut.BusWidgetKit)}}, FBSOpenApplicationRequestID=0xe5da, NSLocalizedDescription=The request to open "com.apple.springboard" failed.}}} Domain: DTXMessage Code: 1 User Info: { DVTErrorCreationDateKey = "2023-10-02 21:06:04 +0000"; } -- System Information macOS Version 14.0 (Build 23A344) Xcode 15.0 (22265) (Build 15A240d) Timestamp: 2023-10-03T00:06:04+03:00
4
0
2.2k
Oct ’23
Push notifications were not successfully delivered and have bad status
Hello everyone, I have been working on a macOS app that utilizes push notifications for the past year. Up until recently, everything was functioning correctly. However, now I'm experiencing issues where push notifications are either not being delivered at all or are experiencing significant delays, sometimes up to 10 minutes. Setting the priority header to 10 hasn't made any difference. I am currently using development push notifications, but the issue persists when switching to the production environment. I'm curious if anyone else has encountered similar problems. When checking the push console, it frequently reports that the device is offline, even though it's actually online ("discarded as device was offline"). Occasionally, notifications are delivered promptly, but this is becoming increasingly infrequent. This issue has been consistently reported by our testers, particularly after they updated to macOS Sonoma. Any insights or assistance you can provide would be greatly appreciated.
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8
5.1k
Nov ’23
Start live activity with push notification problem
Hey there, i implemented live activity in my app and iam trying to start the live activity from push notification, updates works fine even when the app is in background but starting the activity creating issue mostly on background and kill mode when i check the delivery of live activity on cloudkit console it says stored for device power considerations. anyone having the same issue ?
1
1
680
May ’24
Not receiving apple server notification v2 on production URL
Hello, previously i have tested the purchase via test flight and the server notification was sent to my sandbox url. Now when I made the purchase from live app, my server did not receive any notification even though the production url was the same as the sandbox url. The purchase was for a consumable product. Please help, thanks.
2
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515
Aug ’24
Implement UNUserNotificationCenterDelegate in iOS app using Swift6
I've got a problem with compatibility with Swift6 in iOS app that I have no idea how to sort it out. That is an extract from my main app file @MainActor @main struct LangpadApp: App { ... @State private var notificationDataProvider = NotificationDataProvider() @UIApplicationDelegateAdaptor(NotificationServiceDelegate.self) var notificationServiceDelegate var body: some Scene { WindowGroup { TabView(selection: $tabSelection) { ... } .onChange(of: notificationDataProvider.dateId) { oldValue, newValue in if !notificationDataProvider.dateId.isEmpty { tabSelection = 4 } } } } init() { notificationServiceDelegate.notificationDataProvider = notificationDataProvider } } and the following code shows other classes @MainActor final class NotificationServiceDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate { var notificationDataProvider: NotificationDataProvider? func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool { UNUserNotificationCenter.current().delegate = self return true } func setDateId(dateId: String) { if let notificationDataProvider = notificationDataProvider { notificationDataProvider.dateId = dateId } } nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse) async { // After user pressed notification let content = response.notification.request.content if let dateId = content.userInfo["dateId"] as? String { await MainActor.run { setDateId(dateId: dateId) } } } nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification) async -> UNNotificationPresentationOptions { // Before notification is to be shown return [.sound, .badge, .banner, .list] } } @Observable final public class NotificationDataProvider : Sendable { public var dateId = "" } I have set Strict Concurrency Checking to 'Complete.' The issue I'm facing is related to the delegate class method, which is invoked after the user presses the notification. Current state causes crash after pressing notification. If I remove "nonisolated" keyword it works fine but I get the following warning Non-sendable type 'UNNotificationResponse' in parameter of the protocol requirement satisfied by main actor-isolated instance method 'userNotificationCenter(_:didReceive:)' cannot cross actor boundary; this is an error in the Swift 6 language mode I have no idea how to make it Swift6 compatible. Does anyone have any clues?
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1.5k
Aug ’24
Critical Alerts and Notification Permissions
Back story: I'm developing an app that communicates with a personal medical device. We use critical alerts when we have hardware issues that could result in harm to the patient. The audio file is a 30 second file to make sure the patient is aware. If the app is open when they occur, we pop up a modal message in the app. When the user dismisses the notice, we call UNNotificationCenter::removeDeliveredNotifications(withIdentifiers:) to remove the critical alert and also to stop the audio file that is playing. This normally works fine. However we discovered that if the patient leaves critical alert enabled but disables notifications for our app, that we can still post the critical alert and it goes off. However when the user dismisses the message, the removeDeliveredNotifications call does not work. I did some debugging and if call getDeliveredNotifications with this permission combination, it return 0 (normally it would return 1). Does anyone know of another way to remove the critical alert in this situation? (or should I be submitting this as a bug?)
2
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541
Sep ’24
APNS Connection Timed out
This error has been continuously occurring for about 9 hours. We have not replaced the certificate, modified the server code, or changed the firewall policy. Some requests succeed, but many are timing out, with several timeouts occurring every minute. We are unable to find the cause. Please help. APNS Exception io netty channel ConnecttimeException: Connection timed out
APNSOutboundHandler api.push.apple.com/17.188.169.28:443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 api.push.apple.com/(other ip):443 ...
2
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679
Sep ’24
Wallet Pass not updating for some customers
I am looking for advice for debugging a wallet pass not updating for some customers after successfully posting an APNS notification (pass identifier as topic, no expiration, priority 10). Is there an exhaustive list of reasons for a wallet pass not updating or a guide for making sure updates happen reliably? Are there are any guarantees made as to when the pass is updated? We noticed it is either never updating or the update happens much later for some customers. Usually toggling "Automatic Updates" in Pass Details updates the pass immediately for affected customers. Can it be caused by an error in the implementation of the Wallet Passes Web Service? We generate passes on the fly as a response to /v1/passes/{passTypeIdentifier}/{serialNumber}. I noticed that we also sometimes receive HEAD requests to this endpoint despite the documentation only mentioning the GET method. I was previously returning a HTTP status code 405 (Method Not Allowed). I have now updated it to also respond with headers (Content-Type, Content-Disposition and Last-Modified) for the pass for HEAD requests, but I don't know if it makes a difference. Here is a list of issues on the customer side I was thinking of: No connection to the internet Low power mode (does it prevent or throttle updates?) What happens if there is an error? Does it keep trying or does it just fail silently? In the latter case it might make sense to keep sending APNS notifications until the pass is requested successfully. I know that you can use the PassKit framework in iOS apps to update (replace) passes. Would this be more reliable than a stand-alone Wallet pass?
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2
742
Oct ’24
How to Retrieve Current Badge Count After applicationIconBadgeNumber Deprecation?
Hi Everyone, I noticed that applicationIconBadgeNumber has been deprecated in iOS17. While there's a new method to set the badge number using setBadgeCount(_:withCompletionHandler:), I couldn't find a way to retrieve the current value. Previously we used to call UIApplication.shared.applicationIconBadgeNumber, to get the current value, which is deprecated now. Does anyone know how to get the current badge count? Thanks!
1
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838
Oct ’24
Sending 'notification' risks causing data races
I'm attempting to leverage notifications in an app that is in Swift 6 language mode. I have the following code: func startLocationUpdates() { //if self.manager.authorizationStatus == .notDetermined { // self.manager.requestWhenInUseAuthorization() //} self.logger.info("Starting location updates") Task { do { let updates = CLLocationUpdate.liveUpdates() for try await update in updates { if !self.updatesStarted { break } // End location updates by breaking out of the loop. self.lastUpdate = update if let loc = update.location { self.lastLocation = loc self.isStationary = update.stationary self.count += 1 self.logger.info("Location \(self.count): \(self.lastLocation)") } if lastUpdate!.insufficientlyInUse { let notification = UNNotificationRequest(identifier: "com.example.mynotification", content: notificationContent, trigger: nil) try await UNUserNotificationCenter.current().add(notification) } } } catch { self.logger.error("Could not start location updates") } return } } As an aside, the above is directly taken from the following sample: https://developer.apple.com/documentation/CoreLocation/adopting-live-updates-in-core-location. With Swift 6 language mode enable, this generates a compiler error for the statement: try await UNUserNotificationCenter.current().add(notification) Sending main actor-isolated 'notification' to nonisolated instance method 'add' risks causing data races between nonisolated and main actor-isolated uses How can I fix this?
1
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548
Oct ’24
Inquiry About Upcoming Changes to APNs Certificates
Hello, I’m reaching out to gather information regarding the upcoming changes to APNs certificates that are set to be implemented in the beta at the end of January 2025. Specifically, I would like to understand the following: What will be the practical impact of these changes on apes apis ? What actually needed to be done at trust store for this changes, and how will it affect our current setup? What steps do we need to take to update the certificates on our servers? it’s crucial for us to address these changes in advance and keep our customers informed. Thank you for your help!
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3.3k
Oct ’24