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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didRegisterForRemoteNotificationsWithDeviceToken Not Called on iOS 18.1.1
I'm experiencing issues with didRegisterForRemoteNotificationsWithDeviceToken not being called on iOS 18.1.1. Here's what I've tried: Basic Setup: Properly configured UNUserNotificationCenter Requested permissions with requestAuthorization(options:) Registered for remote notifications with registerForRemoteNotifications() Environment: Xcode 16.3 iOS 18.1.1 (physical device) Firebase (tried with and without it) Troubleshooting: Verified provisioning profile includes Push Notifications Confirmed APNs certificate is valid Disabled Firebase's method swizzling Tested on a clean project (works fine) Checked device logs (no relevant errors) Code Snippet: // In AppDelegate.swift public func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) { let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) } let tokenString = tokenParts.joined() print("📱 Device Token: \(tokenString)") // Store the token for your backend UserDefaults.standard.set(tokenString, forKey: "deviceToken") // Send to backend Task { do { try await APIService.shared.setDeviceToken(tokenString) } catch { print("❌ [AppDelegate] Failed to send device token to backend: \(error)") } } } public func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool { // IMPORTANT: First handle push notification registration UNUserNotificationCenter.current().delegate = self // Request notification permissions self.requestNotificationPermissions() // Register for remote notifications DispatchQueue.main.async { UIApplication.shared.registerForRemoteNotifications() } return true } private func requestNotificationPermissions() { UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { granted, error in guard granted else { print("❌ Notification permission not granted") return } print("✅ Notification permission granted") } }
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96
May ’25
Can iOS automatically launch an app or show a screen upon receiving a push notification (including critical alerts)?
Hi all, May I please ask for an official clarification or documentation reference from Apple regarding this scenario: Is it possible for an iOS app to automatically launch or open a specific screen when a push notification is received — while the app is in the background or terminated (killed) state? I understand that for most cases, user interaction (such as tapping the notification) is required before the app can show UI. However, I’d like to confirm whether this is also true for time-sensitive or critical alert notifications, including emergency use cases (e.g. public safety alerts). Specifically: Can a critical alert notification directly launch the app or present a view controller? Or is user interaction always required before the app can present any UI, even with the critical alert entitlement? I would appreciate if anyone — especially Apple staff or engineers — could share an official Apple document or statement that confirms this behavior. Thank you very much! (Use case context: I’m developing an emergency broadcast feature for a property management / tenant app.)
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98
Oct ’25
CarPlay Driving Task notification press handling
We're trying to add simple notifications to our CarPlay integration that should open certain template when pressed, but the issue is that when pressing this notification on CarPlay screen nothing is invoked in the code (presumably didReceive should be invoked). All works fine with the same notification but pressed on the iPhone screen - didReceive is invoked properly. How should I handle the action when push notification is pressed on CarPlay screen?
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199
Sep ’25
Remotely dismissing notifications on iOS
I am sending push notifications on iOS, and I can receive and display them correctly. I want to be able to dismiss notifications that have been read server-side (e.g. on a different device) so I am trying to send a custom notification payload alongside a badge counter update, that specifies what notification IDs to remove. I then use removeDeliveredNotifications on the IDs I get. However, it doesn't seem to be working. I am setting the identifier using the apns-collapse-id header and I do see that reflected on the device side. Any ideas what I might be doing wrong? This is how I'm handling push notifications: func userNotificationCenter( _ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void ) { let customPayload = notification.request.content.userInfo if let dismissedNotifications = customPayload["dismissed_notifications"] as? [String] { center.removeDeliveredNotifications(withIdentifiers: dismissedNotifications) } completionHandler([.banner, .sound, .badge]) } I also tried doing the same thing inside func userNotificationCenter( _ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void ) Thank you!
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463
Feb ’25
My app suddenly cannot receive push notifications
My app(The Smart Life app) is unable to receive push notifications. Please confirm whether APNs has received push notifications from Alibaba Cloud and whether APNs has successfully pushed notifications to the Smart Life app.The Smart Life app uses Alibaba Cloud's push notification service. The message ID pushed by Alibaba Cloud is: f7a02288-a995-47ed-b417-837461028f03 Current Symptom: Alibaba Cloud has reported that this message has been successfully pushed to APNs, but the smart life app has not received any push notifications. The feedback log from Alibaba Cloud shows that the APNs push was successful, but the smart life app did not receive any push. Because APNs do not have message receipts and Alibaba Cloud cannot obtain notification delivery status, it is recommended that I use the APNs channel message ID to submit a work order to Apple technical support for investigation. Note: All push notification permissions for the Smart Life app are enabled, and the Smart Life app is in the foreground when push notifications are sent.
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96
Sep ’25
I don't understand apple store server to server notification
Hello, I'am trying to validate a new app from apple. I have configured sandbox url and production url for server to server apple store notification. I have created subscriptions product id, but there are no validated yet by apple. When I upload my app to testflight, I can't test sandbox notification cause the product id are not available, on local xcode with storekit file I got my product Id but I don't receive notification. So my question is how can I test there thing. I have to produce fake product id ? I'm lock its very complex process, I don't understand. I tried to send my app like that for verification but the team told me to use receipt, but its deprecated and notification webhook is better for me. What is the good order, validate my subscription product ID then test ? what is the good steps. Apple seems to don't want validate my subscription product ID I'm lock..
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334
Jan ’25
How to turn off shortcuts notifications permanently apart from turning it off via screen time as it keeps turning itself back ON.
I have created a configuration profile which basically just turns off notifications for Shortcuts app but I am unable to install it on my iPhone as I am getting the following error “This profile can be installed on a supervised device only” can someone please help me with this? Would also appreciate if you have another way to turn off shortcuts notifications permanently since when I turn it off via screen time it keeps turning itself ON every couple of days.
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297
Feb ’25
Error when validating the APNS Certificate
I trying to validate the certificate I created for APNS using the following command but I get an error. openssl s_client -connect gateway.push.apple.com:2195 -cert temp.pem -debug -showcerts Error: getaddrinfo: nodename nor servname provided, or not known connect:errno=0 Any help will be greatly appreciated.
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170
Sep ’25
watchOS Standalone App Notification Settings Not Appearing
I'm having an issue on my standalone watchOS app where the settings to adjust notifications does not appear anywhere on the iPhone or the Watch. I have successfully requested notifications access from the user and have successfully displayed a local notification to them. However, if the user ever decides to revoke my notification access (or if they deny originally and want to change), the settings pane for notifications does not appear anywhere. I've looked in the following places: On the watch in Settings > Notifications, however it looks like you can no longer edit per app notification settings directly on the watch (none of the installed apps on my watch appear in here). The only options are settings like "tap to show full notification" and "announce notifications" which affect all notifications (Why not? Especially for apps that don't have a iPhone companion app?). On the iPhone in the Watch app (the app you set up your watch in), in Watch > Notification. My app does not appear anywhere in there. On the iPhone in the iPhone Settings app, in Settings > Notifications. My app does not appear anywhere in there. On the iPhone in the iPhone Settings app, in Settings > Apps. My app does not appear anywhere in there I've tried: Adding capabilities in Signing & Capabilities for Push Notification, Time-Sensitive Notifications and Communication Notifications Building the app for release instead of debug My app also requires location access and has successfully appeared in the settings pane directly on the watch in Settings > Privacy & Security > Location Services, however notification settings do not appear anywhere. I have created a stripped down test app to try and that also does not work. This test code successfully asks the user for permission and (from a button in ContentView), successfully schedules a notification and displays it to the user when they're not in the app. Here's the code for my NotificationManager: import UserNotifications class NotificationManager: NSObject, ObservableObject, UNUserNotificationCenterDelegate { static let shared = NotificationManager() @Published var hasAuthorisation = false private override init() { super.init() UNUserNotificationCenter.current().delegate = self requestAuthorisation() } func requestAuthorisation() { UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound]) { authorised, error in DispatchQueue.main.async { if let error = error { print("Error requesting notifications: \(error.localizedDescription)") } self.hasAuthorisation = authorised } } } func scheduleNotification(title: String, body: String, timeInterval: TimeInterval) { let content = UNMutableNotificationContent() content.title = title content.body = body content.sound = .default let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterval, repeats: false) let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger) UNUserNotificationCenter.current().add(request) { error in if let error = error { print("Error scheduling notification: \(error.localizedDescription)") } else { print("Notification scheduled successfully.") } } } } This issue has persisted across two iPhones (recently upgraded) and the watch was wiped when connecting to the new iPhone. Am I missing some code? Am I missing some flag I need to set in my project somewhere? Please can someone with an Apple Watch try this code in a standalone watchOS app and see if the notifications pane appears anywhere for them? I've contacted Apple DTS, but they're taking a while to respond.
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344
Jan ’25
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.
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742
Apr ’25
UNNotificationRequest set timestamp to a relative time
The system calendar when showing a calendar event shows a relative timestamp on the notification versus all other apps which have a timestamp of when the notification was sent. Is there a way to set the timestamp to be relative? I am currently working on a calendar app and we should be able to use the same system that apple uses for its own calendar. Post about this on stack overflow from someone else a few years ago
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306
Mar ’25
Critical Alerts Entitlement
Hi Team, We’re following up on our request for the Critical Alert entitlement for our app, which we plan to use to notify users about critical states of their devices. It’s been almost 4 weeks since we submitted the request, and we wanted to check on the typical review timeline so we can plan our upcoming work accordingly. If there’s anything we can provide or clarify to help complete the review or make the process easier, we’d be happy to assist. or the right forum to reach out to.
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59
Jul ’25
How to correctly convert the bytes type devicetoken obtained from the MDM description file to the 16-bit hexadecimal data required by APNS?
I have converted a large part of the data, but only 5% of the data was successfully converted. The failed devicetoken shows "bad devicetoken" when accessing APNS. Here are examples of failed conversions devicetoken. Is there any official documentation for this part? DeviceToken Orgin \xc2\xa1\xcb\x9cr\xc3\x81\xe2\x80\x9e\x01b\xc3\xbce1pf\t\xc2\xa7\xc3\x82v}\xc3\xa1\xc3\x9a:?\r\n\xc3\xa5\xc6\x92\xc3\xb7y\xc3\x9e\xe2\x80\x9c\xc3\x89r
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73
Jun ’25
VOIP is not receiving calls
Hello, I am developing a calling service using CallKit and VOIP push. I have occasionally encountered a strange issue. The issue is that VOIP permanently fails to receive calls. I was previously informed that even if the device is blocked, it can receive calls again after 24 hours. Also, when I checked the device logic, it complied with the policy requirements set by Apple, including correctly calling CallKit's reportNewIncomingCall method. Once the issue occurs, no matter how many times I try, VOIP does not receive calls, and neither a device reboot nor checking the Device Console Log shows any logs related to CallKit or VOIP. I suspect this might be an issue with the VOIP token, and I believe that the only way to get a new one is to reinstall the app. Is that correct? Of course, after reinstalling, it works fine again, but this is very inconvenient. I don't think this is the right solution. Is there anyone who can share their insights on this issue? Thank you.
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213
Mar ’25
APNS push working on iphone XR but not on iphone 13
Hello , We are trying MDM APNs push using following command curl.exe -X POST --http2 -k -v --cert PushCert.pem --cacert cacert.pem https://api.push.apple.com/3/device/9BFDFB46D48159D16E5DC80391B765EE99524CF294BB4BF9FB5AEA7A5F3FFD79 -d "{"mdm":"84F0C145-5963-4F06-9D11-DFBDB45802D5"}" -H "apns-topic: com.apple.mgmt.External.c217c1bf-ad51-42a9-9108-2e92ef705b2a" -H "apns-push-type: mdm" The command process correctly there is no error but device doesn't receive the Apns push. At the same time the older device recives the Apns push but newer device not. What can be the cause,how to debug this issue.
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233
Jan ’25
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 ...
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681
Apr ’25
Is there a way to dynamically configure Actionable Notifications?
Hello, We are trying to implement Actionable Notifications on iOS via Remote Notifications. According to Apple’s official documentation (Declaring Your Actionable Notification Types), it is recommended to register notification categories at launch time. However, in our use case, the number of buttons and their actions in the Actionable Notification are determined at the time of the Remote Notification request. This means that we cannot predefine the categories at app launch but need to dynamically configure them based on the payload of the Remote Notification. Our Approach We are considering setting aps.mutable-content = 1 and using Notification Service Extension to modify the categoryIdentifier dynamically. Below is the JSON payload we plan to use for Remote Notifications: { "aps": { "alert": { "title": "New Message Received!", "body": "Check out the details." }, "category": "DYNAMIC_CATEGORY", "mutable-content": 1 }, "categoryData": { "id": "DYNAMIC_CATEGORY", "actions": [ { "id": "REPLY_ACTION", "title": "Reply", "options": ["foreground"] }, { "id": "DELETE_ACTION", "title": "Delete", "options": ["destructive"] } ] } } Questions: Can we dynamically configure Actionable Notifications based on the Remote Notification payload? If we set categoryIdentifier in Notification Service Extension’s didReceive(_:withContentHandler:), will users still see the correct action buttons even if the app is terminated? What is the recommended approach to dynamically configure Actionable Notifications at the time of receiving the Remote Notification, rather than at app launch?
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73
Mar ’25