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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iPhone push notifications stop: DeviceTokenNotForTopic
We are facing an issue: push notifications are not being received. We are using the Marketing Cloud SDK for push notifications. On install, the app correctly registers for push notifications. We pass the required information to Marketing Cloud — for example, contact key, token, etc. Marketing Cloud also confirms that the configuration is set up, and we have tried sending push notifications with proper delivery settings. The issue is that after some time, the device gets automatically opted out in the Marketing Cloud portal. When we consulted their team, they said this is caused by the “DeviceTokenNotForTopic” error received from APNs. I have verified the certificates and bundle ID from my end — everything looks correct. Device: iPhone 15, iPhone 17 iOS: 18.7.2, 26.1
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188
Dec ’25
[Xcode 26 beta 4] Cannot receive device token from APNS using iOS 26 simulator
Since upgrading to Xcode 26 beta 4 and using the iOS 26 simulator for testing our app, we've stopped being able to receive device tokens for the simulator from the development APNS environment. The APNS environment is able to return meta device information (e.g. model, type, manufacturer) but there are no device tokens present. When running the same app using the iOS 18.5 simulator, we are able to register the device with the same APNS environment and receive a valid device token.
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3.7k
Mar ’26
Are notification pushes not being received when in Picture-in-Picture mode?
Hello, I recently had an unusual experience, and I’m wondering if this is related to Apple’s policies, so I wanted to ask. While a call is in Picture-in-Picture (PIP) mode, notification pushes from the same app do not appear. The API is being triggered, but the notification banner does not show on the device. Once PIP is closed, the notifications start appearing normally again. Is this behavior enforced by Apple’s policies? What’s interesting is that banners from other apps do appear — only the banners from the app currently in PIP are not shown.
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250
Dec ’25
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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9.2k
Nov ’25
Abnormal Fluctuations in APNs API Response Success Rate (July 15-30)
Observations​​: When our app calls the APNs API for push notifications, we observed significant fluctuations: July 15-25​​: The success response volume ​​increased by 20%​​ compared to the baseline before July 15. ​​After July 25​​: Success rates returned to baseline levels. July 30​​: Success response volume ​​decreased by 10%​​ compared to the pre-July 15 baseline. ​​ Excluded Factors​​: No changes in target audience size or characteristics (business factors ruled out). Server logs confirm consistent API request parameters and frequency. ​​Key Questions​​: Were there any ​​adjustments to response metrics​​ (e.g., success status code definitions) during this period? Have other developers reported similar issues? Were there server-side configuration updates or known incidents on Apple’s end?
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Aug ’25
Does UNNotificationRequest have a 64-notification scheduling limit?
Hi, We have a simple calendar reminder app that uses UNNotificationRequest to schedule local notifications for user events. I’m wondering whether UNNotificationRequest has a system-imposed limit of 64 upcoming scheduled notifications, similar to the deprecated UILocalNotification. We’re asking because one of our users is not receiving recently scheduled reminders. Our current workflow is: We schedule notifications on app launch and when the app is about to quit. Before scheduling, we call removeAllPendingNotificationRequests(). We then fetch the 64 nearest upcoming events and schedule them using UNUserNotificationCenter.current().add(...). This approach works fine during our testing, but we’re unsure what might be causing the issue for some users. Any insights would be appreciated. Thanks!
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373
Jan ’26
Getting null data from App Store Server Notification
Hello Apple Support Team, We are using auto-renew plans in our app We have set the webhook URL in our App Store Connect account to get the Store server notification to get the auto renew data for an user The issue is when a user purchases any auto-renew plan at the auto-renew time, we are getting null data from the Apple side. We have printed the log's data to check what data are coming from the Apple webhook. we have attached our logs data please check it and let me know what can we do to resolve this
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124
Jun ’25
Inquiry About Push Notification Behavior After App Transfer
We are in the process of transferring our app to a new Apple Developer Organization account. Our app uses the Apple Push Notification service (APNs) with a .p8 authentication key configured on our server to send push notifications. We would like to confirm: Once the app transfer is completed, will push notifications continue to work temporarily using the existing .p8 key on our server, until we generate and configure a new .p8 key under the new organization's account? Understanding this behavior is critical for us to ensure a smooth transition and avoid any disruption in push notification delivery for our users. Thank you for your guidance and support.
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Aug ’25
UNNotificationAttachment preview intermittently missing (attachment-store URL becomes unreadable)
I have been fighting this problem for two months and would love any help, advice or tips. Should I file a DTS ticket? Summary We attach a JPEG image to a local notification using UNNotificationAttachment. iOS reports the delivered notification as having attachments=1, but intermittently no image preview appears in Notification Center. In correlated cases, the attachment’s UNNotificationAttachment.url (which points into iOS’s attachment store) becomes unreadable (Data(contentsOf:) fails) even though the delivered notification still reports attachments=1. This document describes the investigation, evidence, and mitigations attempted. Product / Component UserNotifications framework UNNotificationAttachment rendering in Notification UI (Notification Center / banner / expanded preview) Environment App: OnThisDay (SwiftUI, Swift 6) Notifications: local notifications scheduled with UNCalendarNotificationTrigger(repeats: false) Attachment: JPEG generated from PhotoKit (PHImageManager.requestImage) and written to app temp directory, then passed into UNNotificationAttachment. Test contexts: Debug builds (direct Xcode install) TestFlight builds (production signing) iOS devices: multiple, reproducible with long runs and user clearing delivered notifications Expected Result Delivered notifications with UNNotificationAttachment should consistently show the image preview in Notification Center (thumbnail and expanded preview), as long as the notification reports attachments=1. If the OS reports attachments=1, the attachment’s store URL should remain valid/readable for the lifetime of the delivered notification still present in Notification Center. Actual Result Intermittently: Notification Center shows no image preview even though the app scheduled the notification with an attachment and iOS reports the delivered notification as having attachments=1. When we inspect delivered notifications via UNUserNotificationCenter.getDeliveredNotifications, the delivered notification’s request.content.attachments.first?.url exists but is unreadable (attempting Data(contentsOf:) returns nil / throws), i.e. the backing attachment-store file appears missing or inaccessible. In some scenarios the attachment-store file is readable for hours while the notification is pending, and then becomes unreadable after the notification is delivered. Reproduction Scenarios (Observed) Next-day reminders show attachment-store unreadable after delivery 1. Schedule a one-shot daily reminder for next day (07:00 local time) with UNCalendarNotificationTrigger(repeats: false) and a JPEG attachment. 2. During the prior day, periodic background refresh tasks verify the pending notification’s attachment-store URL is readable (pendingReadable=true). 3. After the reminder is delivered the next morning, the delivered snapshot shows the delivered notification’s attachment-store URL is unreadable (readable=false) and Notification Center shows no preview. Interpretation: the attachment-store blob appears to become inaccessible around/after delivery, despite being readable while pending. Evidence and Instrumentation We added non-crashing diagnostic logging (Debug builds) around: Scheduling time Logged that we successfully created a UNNotificationAttachment from a unique temp file. Logged that UNUserNotificationCenter.add(request) succeeded. Queried pendingNotificationRequests() and logged the scheduled request’s attachment url.lastPathComponent (iOS attachment-store filename). Delivered time (when app becomes active) Called UNUserNotificationCenter.getDeliveredNotifications and logged: delivered count, attachment count attachment url.lastPathComponent whether Data(contentsOf: attachment.url) succeeds (readable=true/false) Content fingerprinting Fingerprinted the exact JPEG bytes we wrote (SHA-256 prefix + byte count). Logged the iOS attachment-store filename (url.lastPathComponent) returned post-scheduling. Decode validation probe (later addition) When Data(contentsOf:) succeeds, we validate it decodes as an image using CGImageSourceCreateWithData and log: UTI (e.g. public.jpeg) pixel width/height magic header bytes What we tried / Mitigations Proactive “self-heal” for pending notifications Change: during background refresh/foreground refresh, verify the pending daily reminder’s attachment-store URL readability. If it’s unreadable, reschedule with a new attachment (same trigger). Rationale: if iOS drops the store file before delivery, recreating could repair it. Result: We observed cases where pending remained readable but delivered became unreadable after delivery, so this doesn’t address all observed failures. It is still valuable hardening. Increase scheduling frequency / reschedule closer to fire time (proposed/considered) We discussed adding a debug mode to always recreate the daily reminder during background refresh tasks (or only within N hours of fire time) to reduce the time window between attachment creation and delivery. Status: experimental; not yet confirmed to resolve the “pendingReadable=true → delivered unreadable after delivery” failure. Impact The primary UX value of the daily reminder is the preview photo; missing previews degrade core functionality. Failures are intermittent and appear dependent on OS attachment-store behavior and Notification Center actions (clearing notifications), making them difficult to mitigate fully app-side. Notes / Questions for Apple 1. Is iOS allowed to coalesce/deduplicate UNNotificationAttachment storage across notifications? If so, what is the retention model when delivered notifications are removed? 2. If a delivered notification still reports attachments=1, should its attachment-store URL remain valid/readable while the notification is still present in Notification Center? 3. In “next-day” one-shot scheduling scenarios, can the attachment-store blob be purged between scheduling and delivery (or immediately after delivery) even if the notification remains visible? 4. Is there a recommended pattern to ensure attachment previews remain stable for long-lived scheduled notifications (hours to a day), especially when using UNCalendarNotificationTrigger(repeats: false)? Minimal Code Pattern (simplified) 1. Generate JPEG (PhotoKit → UIImage → JPEG Data). 2. Write to a unique temp URL. 3. Create attachment: UNNotificationAttachment(identifier: <uuid>, url: <tempURL>, options: [UNNotificationAttachmentOptionsTypeHintKey: "public.jpeg"]) 4. Schedule notification with a calendar trigger for the next morning.
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2w
CarPlay notifications unsupported for Driving Task apps in iOS 18.6
I have my app configured as a Driving Task app with the entitlement and provisioning profile correctly set up. I am also requesting the ".carPlay" notification authorization option and setting up the carplay notification category with the ".allowInCarPlay" category, both without error. When testing with the iPhone and carplay simulators the user notifications I send are appearing on the phone but not in carplay. When I check the notification settings with UNUserNotificationCenter.current().getNotificationSettings() I see that carplay is shown to be not supported ("carPlaySetting: NotSupported"). The CarPlay Developer Guide 2025-06-09 (which is the version currently referenced in the Apple docs) states that "Starting in iOS 18.4, notifications are also supported in CarPlay driving task apps". Has this discrepancy been addressed anywhere, or is this an open issue? My software versions: MacOS: Sequoia 15.6 XCode: 16.4 iPhone Simulator: iPhone 16 with iOS 18.6
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137
Aug ’25
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
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Nov ’25
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 } } }
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Nov ’25
iOS doesn't handle incoming call of Local PUSH when receiving a Local PUSH after receiving an APNs PUSH
I am developing an application that uses NetworkExtension (Local PUSH function) And VoIP(APNs) PUSH. Nowadays, I found a problem on this app doesn't handle incoming call of Local PUSH when receiving a Local PUSH after receiving an APNs PUSH. My confimation result of my app and server log is below. 11:00 AM: my server(PBX) requests a VoIP(APNs) PUSH notification to the APNs. But my app does not receive the VoIP(APNs) PUSH. At this time, my app is running on LAN (Wi-Fi without internet connection), as a result, NetworkExtension was running. so I think this is normal behaviour. 14:55:11 PM: There is an incoming call from the my server(PBX) via local net, and NetworkExtension calls iOS API(API name is reportIncomingCall). However, iOS does not call the delegate didReceiveIncomingCallWithUserInfo for the reportIncomingCall. 14:55:11 PM: At almost the same time, iOS calls the delegate cdidReceiveIncomingPushWithPayload of VoIP PUSH. (instead of call the delegate didReceiveIncomingCallWithUserInfo for the reportIncomingCall?) And the content of this VoIP(APNs) PUSH was the incoming call at "11:00 AM". In other words, the VoIP(APNs) PUSH at 11:00 AM is stuck inside iOS, and at 14:55:11 PM, from NetworkExtension reports it. I feel there is a problem on iOS doesn't handle incoming call of Local PUSH when receiving a Local PUSH after receiving an VoIP(APNs) PUSH. Would you tell me Apple's opioion about this? If this is known problem, Please tell me about it.
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Feb ’26
Critical Messages Allow messages to
I am creating an app that uses critical messages, I have been granted this entitlement and I am adding the certificate and in the info.plist. In the app I request authorization to send messages to specific numbers. When I try the app in production from Xcode this works fine and I can send the critical messages. However, when I am using the app in the test flight the authorization does not seem to be remembered on the background. Moreover, I go to security/privacy settings and I grant permission to the selected number (I see that it only shows one number even when I have to granted, its like it removes the previous one) however when I exit the setting page the permission is reset (and therefore denied), I think this is a bug. Can you look into that. Both this removing granted permission (HIGH PRIORITY, this message can only be sent in the background, therefore the user can not grant it and why the maximum telephone number to be granted to send messages is reset also to a single one LOWER PRIORITY). Thanks
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May ’25
Notification Service Extension and the main thread
Question, if I am writing async code in the notification service extension, I understand it terminates after 30 seconds. If I want to wait until these async methods finish before calling the content handler, I believe an option I have is to use dispatch groups. However I am open to other solutions if there are better options. My question is, if I use dispatch groups, is there any issue in using the main queue here? Or does the main thread not make sense to use in the context of the NSE? dispatch_group_notify(group, dispatch_get_main_queue(), ^{ if (self.contentHandler) { self.contentHandler(self.bestAttemptContent); } }); Or is it recommended to instead use a different queue in the NSE? dispatch_queue_t nseQueue = dispatch_queue_create("com.blah.blah.nse.queue", DISPATCH_QUEUE_SERIAL); dispatch_group_notify(group, dispatch_get_global_queue(QOS_CLASS_(SOMETHING), 0), ^{ ... }); OR am I over thinking this? :) Thanks ahead of time, relatively new to iOS so just looking to learn/understand better.
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Jun ’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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Sep ’25
iPhone push notifications stop: DeviceTokenNotForTopic
We are facing an issue: push notifications are not being received. We are using the Marketing Cloud SDK for push notifications. On install, the app correctly registers for push notifications. We pass the required information to Marketing Cloud — for example, contact key, token, etc. Marketing Cloud also confirms that the configuration is set up, and we have tried sending push notifications with proper delivery settings. The issue is that after some time, the device gets automatically opted out in the Marketing Cloud portal. When we consulted their team, they said this is caused by the “DeviceTokenNotForTopic” error received from APNs. I have verified the certificates and bundle ID from my end — everything looks correct. Device: iPhone 15, iPhone 17 iOS: 18.7.2, 26.1
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188
Activity
Dec ’25
[Xcode 26 beta 4] Cannot receive device token from APNS using iOS 26 simulator
Since upgrading to Xcode 26 beta 4 and using the iOS 26 simulator for testing our app, we've stopped being able to receive device tokens for the simulator from the development APNS environment. The APNS environment is able to return meta device information (e.g. model, type, manufacturer) but there are no device tokens present. When running the same app using the iOS 18.5 simulator, we are able to register the device with the same APNS environment and receive a valid device token.
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16
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3.7k
Activity
Mar ’26
Are notification pushes not being received when in Picture-in-Picture mode?
Hello, I recently had an unusual experience, and I’m wondering if this is related to Apple’s policies, so I wanted to ask. While a call is in Picture-in-Picture (PIP) mode, notification pushes from the same app do not appear. The API is being triggered, but the notification banner does not show on the device. Once PIP is closed, the notifications start appearing normally again. Is this behavior enforced by Apple’s policies? What’s interesting is that banners from other apps do appear — only the banners from the app currently in PIP are not shown.
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1
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250
Activity
Dec ’25
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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4
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0
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9.2k
Activity
Nov ’25
Background Local cache update
Currently, I have implemented local cache update with server data when app is killed using Push Notification and Notification Service Extension. So it works even the app is killed by the user, but I wanted to know whether this is app review safe work around or not as I am not finding any documentation for this.
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3
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162
Activity
Dec ’25
Abnormal Fluctuations in APNs API Response Success Rate (July 15-30)
Observations​​: When our app calls the APNs API for push notifications, we observed significant fluctuations: July 15-25​​: The success response volume ​​increased by 20%​​ compared to the baseline before July 15. ​​After July 25​​: Success rates returned to baseline levels. July 30​​: Success response volume ​​decreased by 10%​​ compared to the pre-July 15 baseline. ​​ Excluded Factors​​: No changes in target audience size or characteristics (business factors ruled out). Server logs confirm consistent API request parameters and frequency. ​​Key Questions​​: Were there any ​​adjustments to response metrics​​ (e.g., success status code definitions) during this period? Have other developers reported similar issues? Were there server-side configuration updates or known incidents on Apple’s end?
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2
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1
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257
Activity
Aug ’25
Does UNNotificationRequest have a 64-notification scheduling limit?
Hi, We have a simple calendar reminder app that uses UNNotificationRequest to schedule local notifications for user events. I’m wondering whether UNNotificationRequest has a system-imposed limit of 64 upcoming scheduled notifications, similar to the deprecated UILocalNotification. We’re asking because one of our users is not receiving recently scheduled reminders. Our current workflow is: We schedule notifications on app launch and when the app is about to quit. Before scheduling, we call removeAllPendingNotificationRequests(). We then fetch the 64 nearest upcoming events and schedule them using UNUserNotificationCenter.current().add(...). This approach works fine during our testing, but we’re unsure what might be causing the issue for some users. Any insights would be appreciated. Thanks!
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1
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373
Activity
Jan ’26
Getting null data from App Store Server Notification
Hello Apple Support Team, We are using auto-renew plans in our app We have set the webhook URL in our App Store Connect account to get the Store server notification to get the auto renew data for an user The issue is when a user purchases any auto-renew plan at the auto-renew time, we are getting null data from the Apple side. We have printed the log's data to check what data are coming from the Apple webhook. we have attached our logs data please check it and let me know what can we do to resolve this
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1
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124
Activity
Jun ’25
Does UNCalendarNotificationTrigger fire at the same time everyday even if user changes his timezone ?
I am using UNCalendarNotificationTrigger and from my initial tests with simulator and timezone changes in my mac i see that notification donot get triggered at specific times if timezone changes, is this expected behaviour ?
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2
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1
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299
Activity
Jan ’26
Inquiry About Push Notification Behavior After App Transfer
We are in the process of transferring our app to a new Apple Developer Organization account. Our app uses the Apple Push Notification service (APNs) with a .p8 authentication key configured on our server to send push notifications. We would like to confirm: Once the app transfer is completed, will push notifications continue to work temporarily using the existing .p8 key on our server, until we generate and configure a new .p8 key under the new organization's account? Understanding this behavior is critical for us to ensure a smooth transition and avoid any disruption in push notification delivery for our users. Thank you for your guidance and support.
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2
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0
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145
Activity
Aug ’25
UNNotificationAttachment preview intermittently missing (attachment-store URL becomes unreadable)
I have been fighting this problem for two months and would love any help, advice or tips. Should I file a DTS ticket? Summary We attach a JPEG image to a local notification using UNNotificationAttachment. iOS reports the delivered notification as having attachments=1, but intermittently no image preview appears in Notification Center. In correlated cases, the attachment’s UNNotificationAttachment.url (which points into iOS’s attachment store) becomes unreadable (Data(contentsOf:) fails) even though the delivered notification still reports attachments=1. This document describes the investigation, evidence, and mitigations attempted. Product / Component UserNotifications framework UNNotificationAttachment rendering in Notification UI (Notification Center / banner / expanded preview) Environment App: OnThisDay (SwiftUI, Swift 6) Notifications: local notifications scheduled with UNCalendarNotificationTrigger(repeats: false) Attachment: JPEG generated from PhotoKit (PHImageManager.requestImage) and written to app temp directory, then passed into UNNotificationAttachment. Test contexts: Debug builds (direct Xcode install) TestFlight builds (production signing) iOS devices: multiple, reproducible with long runs and user clearing delivered notifications Expected Result Delivered notifications with UNNotificationAttachment should consistently show the image preview in Notification Center (thumbnail and expanded preview), as long as the notification reports attachments=1. If the OS reports attachments=1, the attachment’s store URL should remain valid/readable for the lifetime of the delivered notification still present in Notification Center. Actual Result Intermittently: Notification Center shows no image preview even though the app scheduled the notification with an attachment and iOS reports the delivered notification as having attachments=1. When we inspect delivered notifications via UNUserNotificationCenter.getDeliveredNotifications, the delivered notification’s request.content.attachments.first?.url exists but is unreadable (attempting Data(contentsOf:) returns nil / throws), i.e. the backing attachment-store file appears missing or inaccessible. In some scenarios the attachment-store file is readable for hours while the notification is pending, and then becomes unreadable after the notification is delivered. Reproduction Scenarios (Observed) Next-day reminders show attachment-store unreadable after delivery 1. Schedule a one-shot daily reminder for next day (07:00 local time) with UNCalendarNotificationTrigger(repeats: false) and a JPEG attachment. 2. During the prior day, periodic background refresh tasks verify the pending notification’s attachment-store URL is readable (pendingReadable=true). 3. After the reminder is delivered the next morning, the delivered snapshot shows the delivered notification’s attachment-store URL is unreadable (readable=false) and Notification Center shows no preview. Interpretation: the attachment-store blob appears to become inaccessible around/after delivery, despite being readable while pending. Evidence and Instrumentation We added non-crashing diagnostic logging (Debug builds) around: Scheduling time Logged that we successfully created a UNNotificationAttachment from a unique temp file. Logged that UNUserNotificationCenter.add(request) succeeded. Queried pendingNotificationRequests() and logged the scheduled request’s attachment url.lastPathComponent (iOS attachment-store filename). Delivered time (when app becomes active) Called UNUserNotificationCenter.getDeliveredNotifications and logged: delivered count, attachment count attachment url.lastPathComponent whether Data(contentsOf: attachment.url) succeeds (readable=true/false) Content fingerprinting Fingerprinted the exact JPEG bytes we wrote (SHA-256 prefix + byte count). Logged the iOS attachment-store filename (url.lastPathComponent) returned post-scheduling. Decode validation probe (later addition) When Data(contentsOf:) succeeds, we validate it decodes as an image using CGImageSourceCreateWithData and log: UTI (e.g. public.jpeg) pixel width/height magic header bytes What we tried / Mitigations Proactive “self-heal” for pending notifications Change: during background refresh/foreground refresh, verify the pending daily reminder’s attachment-store URL readability. If it’s unreadable, reschedule with a new attachment (same trigger). Rationale: if iOS drops the store file before delivery, recreating could repair it. Result: We observed cases where pending remained readable but delivered became unreadable after delivery, so this doesn’t address all observed failures. It is still valuable hardening. Increase scheduling frequency / reschedule closer to fire time (proposed/considered) We discussed adding a debug mode to always recreate the daily reminder during background refresh tasks (or only within N hours of fire time) to reduce the time window between attachment creation and delivery. Status: experimental; not yet confirmed to resolve the “pendingReadable=true → delivered unreadable after delivery” failure. Impact The primary UX value of the daily reminder is the preview photo; missing previews degrade core functionality. Failures are intermittent and appear dependent on OS attachment-store behavior and Notification Center actions (clearing notifications), making them difficult to mitigate fully app-side. Notes / Questions for Apple 1. Is iOS allowed to coalesce/deduplicate UNNotificationAttachment storage across notifications? If so, what is the retention model when delivered notifications are removed? 2. If a delivered notification still reports attachments=1, should its attachment-store URL remain valid/readable while the notification is still present in Notification Center? 3. In “next-day” one-shot scheduling scenarios, can the attachment-store blob be purged between scheduling and delivery (or immediately after delivery) even if the notification remains visible? 4. Is there a recommended pattern to ensure attachment previews remain stable for long-lived scheduled notifications (hours to a day), especially when using UNCalendarNotificationTrigger(repeats: false)? Minimal Code Pattern (simplified) 1. Generate JPEG (PhotoKit → UIImage → JPEG Data). 2. Write to a unique temp URL. 3. Create attachment: UNNotificationAttachment(identifier: <uuid>, url: <tempURL>, options: [UNNotificationAttachmentOptionsTypeHintKey: "public.jpeg"]) 4. Schedule notification with a calendar trigger for the next morning.
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189
Activity
2w
Use ONE_TIME_CHARGE may cause some problem
If a notification: ONE_TIME_CHARGE is used to ship the IAP content, it involves a point where the client might not finish the transaction, yet the item is shipped. Will an unfinished purchase affect refunds?
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1
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95
Activity
May ’25
CarPlay notifications unsupported for Driving Task apps in iOS 18.6
I have my app configured as a Driving Task app with the entitlement and provisioning profile correctly set up. I am also requesting the ".carPlay" notification authorization option and setting up the carplay notification category with the ".allowInCarPlay" category, both without error. When testing with the iPhone and carplay simulators the user notifications I send are appearing on the phone but not in carplay. When I check the notification settings with UNUserNotificationCenter.current().getNotificationSettings() I see that carplay is shown to be not supported ("carPlaySetting: NotSupported"). The CarPlay Developer Guide 2025-06-09 (which is the version currently referenced in the Apple docs) states that "Starting in iOS 18.4, notifications are also supported in CarPlay driving task apps". Has this discrepancy been addressed anywhere, or is this an open issue? My software versions: MacOS: Sequoia 15.6 XCode: 16.4 iPhone Simulator: iPhone 16 with iOS 18.6
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2
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0
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137
Activity
Aug ’25
Critical alerts entitlement.
I submitted the form for the critical alert entitlement but have not received any response for already 2 weeks. How long does it normally take to review such requests? Is there any way I can contact a certain department directly?
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3
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0
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1.9k
Activity
Feb ’26
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
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7
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0
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4k
Activity
Nov ’25
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 } } }
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1
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0
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1.2k
Activity
Nov ’25
iOS doesn't handle incoming call of Local PUSH when receiving a Local PUSH after receiving an APNs PUSH
I am developing an application that uses NetworkExtension (Local PUSH function) And VoIP(APNs) PUSH. Nowadays, I found a problem on this app doesn't handle incoming call of Local PUSH when receiving a Local PUSH after receiving an APNs PUSH. My confimation result of my app and server log is below. 11:00 AM: my server(PBX) requests a VoIP(APNs) PUSH notification to the APNs. But my app does not receive the VoIP(APNs) PUSH. At this time, my app is running on LAN (Wi-Fi without internet connection), as a result, NetworkExtension was running. so I think this is normal behaviour. 14:55:11 PM: There is an incoming call from the my server(PBX) via local net, and NetworkExtension calls iOS API(API name is reportIncomingCall). However, iOS does not call the delegate didReceiveIncomingCallWithUserInfo for the reportIncomingCall. 14:55:11 PM: At almost the same time, iOS calls the delegate cdidReceiveIncomingPushWithPayload of VoIP PUSH. (instead of call the delegate didReceiveIncomingCallWithUserInfo for the reportIncomingCall?) And the content of this VoIP(APNs) PUSH was the incoming call at "11:00 AM". In other words, the VoIP(APNs) PUSH at 11:00 AM is stuck inside iOS, and at 14:55:11 PM, from NetworkExtension reports it. I feel there is a problem on iOS doesn't handle incoming call of Local PUSH when receiving a Local PUSH after receiving an VoIP(APNs) PUSH. Would you tell me Apple's opioion about this? If this is known problem, Please tell me about it.
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7
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0
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1.4k
Activity
Feb ’26
Critical Messages Allow messages to
I am creating an app that uses critical messages, I have been granted this entitlement and I am adding the certificate and in the info.plist. In the app I request authorization to send messages to specific numbers. When I try the app in production from Xcode this works fine and I can send the critical messages. However, when I am using the app in the test flight the authorization does not seem to be remembered on the background. Moreover, I go to security/privacy settings and I grant permission to the selected number (I see that it only shows one number even when I have to granted, its like it removes the previous one) however when I exit the setting page the permission is reset (and therefore denied), I think this is a bug. Can you look into that. Both this removing granted permission (HIGH PRIORITY, this message can only be sent in the background, therefore the user can not grant it and why the maximum telephone number to be granted to send messages is reset also to a single one LOWER PRIORITY). Thanks
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2
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0
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103
Activity
May ’25
Notification Service Extension and the main thread
Question, if I am writing async code in the notification service extension, I understand it terminates after 30 seconds. If I want to wait until these async methods finish before calling the content handler, I believe an option I have is to use dispatch groups. However I am open to other solutions if there are better options. My question is, if I use dispatch groups, is there any issue in using the main queue here? Or does the main thread not make sense to use in the context of the NSE? dispatch_group_notify(group, dispatch_get_main_queue(), ^{ if (self.contentHandler) { self.contentHandler(self.bestAttemptContent); } }); Or is it recommended to instead use a different queue in the NSE? dispatch_queue_t nseQueue = dispatch_queue_create("com.blah.blah.nse.queue", DISPATCH_QUEUE_SERIAL); dispatch_group_notify(group, dispatch_get_global_queue(QOS_CLASS_(SOMETHING), 0), ^{ ... }); OR am I over thinking this? :) Thanks ahead of time, relatively new to iOS so just looking to learn/understand better.
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3
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1
Views
317
Activity
Jun ’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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1
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0
Views
184
Activity
Sep ’25