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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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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Background Push Notifications for Emergency App Delayed Despite Critical Alert Entitlement
I’m using Appnotic from my server to send notifications for an emergency service, where it is critical that notifications are delivered immediately. My payload looks like this: "aps": { "alert": "Test alert", "sound": { "critical": 1, "name": "sound.wav", "volume": 0.5 }, "content-available": 1, "category": "alert" }, "topic": "com.fireservicerota.FSR-Primary-Alerting", "custom_payload": { "id": "11", "type": "alert", "incident_id": 23434, "incident_response_id": 2652343, "expiration_time": "2024-06-06T16:59:05+01:00" } } I already have the critical alert entitlement and background processing enabled. Everything seems fine when debugging, but I’m experiencing issues: • Some notifications never arrive • Around 60% of notifications arrive with noticeable delay Since this is an emergency app, delivery speed is crucial. What could be causing this inconsistency?
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124
Apr ’25
Provisioning Profile Not Including Push Notifications Capability
Provisioning profiles created for my App ID are not including the Push Notifications capability, even though Push Notifications is enabled in the App ID configuration in Apple Developer Portal. I have enabled Push Notifications for my App ID (com.abc.app) in the Apple Developer Portal. The capability shows as enabled and saved. However, when provisioning profiles are generated (either manually or through third-party tools like Expo Application Services), they do not include: The Push Notifications capability The aps-environment entitlement This results in build failures with the following errors: Provisioning profile "*[expo] com.abc.app AppStore [timestamp]" doesn't support the Push Notifications capability. Provisioning profile "*[expo] com.abc.app AppStore [timestamp]" doesn't include the aps-environment entitlement. Steps Taken ✅ Enabled Push Notifications in App ID configuration (com.mirova.app) ✅ Saved the App ID configuration multiple times ✅ Waited for Apple's systems to sync (waited 5-10 minutes) ✅ Removed and re-added Push Notifications capability (unchecked, saved, re-checked, saved) ✅ Created Push Notification key in Apple Developer Portal ✅ Verified Push Notifications is checked and saved in App ID ❌ Provisioning profiles still created without Push Notifications capability Expected Behavior When Push Notifications is enabled for an App ID, any provisioning profiles created for that App ID should automatically include: Push Notifications capability aps-environment entitlement (set to production or development) Actual Behavior Provisioning profiles are created without Push Notifications capability, even though: Push Notifications is enabled in App ID App ID configuration is saved Sufficient time has passed for sync Additional Information Push Notification Key: Created and valid (Key ID: 3YKQ7XLG9L and 747G8W2J68) Distribution Certificate: Valid and active Provisioning Profile Type: App Store distribution Third-party Tool: Using Expo Application Services (EAS) for builds, but issue persists with manually created profiles as well Questions Is there a delay or sync issue between enabling Push Notifications in App ID and it being available for provisioning profiles? Are there any additional steps required to ensure Push Notifications is included in provisioning profiles? Is there a known issue with Push Notifications capability not being included in provisioning profiles? Should I create the provisioning profile in a specific way to ensure Push Notifications is included? Environment Platform: iOS Build Type: App Store distribution Xcode Version: (via EAS cloud build) Thank you for your assistance. I've been unable to resolve this issue and would appreciate any guidance. iOS Deployment Target: Latest
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Apple Push Notification service server certificate update
hi i'm testing the new certificate. I'm using the p12 certificate and without doing anything, the sandbox can still be functioned. I assume the new certificate has already been installed in the default path by linux. so I execute openssl s_client -connect 17.188.143.34:443 -servername api.sandbox.push.apple.com -verifyCAfile /etc/pki/tls/certs/ca-bundle.crt -showcerts and i received CONNECTED(00000003) depth=2 C = GB, ST = Greater Manchester, L = Salford, O = Comodo CA Limited, CN = AAA Certificate Services verify return:1 depth=1 CN = Apple Public Server RSA CA 12 - G1, O = Apple Inc., ST = California, C = US verify return:1 depth=0 C = US, ST = California, O = Apple Inc., CN = api.development.push.apple.com verify return:1 --- Certificate chain 0 s:/C=US/ST=California/O=Apple Inc./CN=api.development.push.apple.com i:/CN=Apple Public Server RSA CA 12 - G1/O=Apple Inc./ST=California/C=US -----BEGIN CERTIFICATE----- ... so the server indeed has the certificate, is this correct?
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Jan ’25
Delivery of expired voip notifications
Hello, We are facing issue that sometimes a voip notification gets delivered after it is expired. The issue can be simply demonstrated we set the device to flight mode, and after 20s we disable flight mode. We still receive the voip notification. We are setting the expiration header as following apns-expiry=0, so from my understanding it should not be delivered if the device was not able to receive the notification in the fist attempt. I have read following thread https://developer.apple.com/forums/thread/778512, from which I understand this is a long standing issue. Hence my question is, is there any way how we can notify the call kit that the call is actually no longer valid, and do not display the call to the user at all? Currently we are forced to always display CallKit call when the notification comes, and some of our users are confused that they see a missed call which they did not have any chance to pick up. Please let me know if you need any more information. Best Regards, Adam Chlupacek
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Nov ’25
Push Notification Sound and Notification Service Extension When App is Killed
Dear Apple Developer Support, I am currently developing an iOS application that uses push notifications with custom .caf audio and a Notification Service Extension. I have implemented the extension to download and play a dynamic sound file from a remote sound_url. It works well when the app is in the foreground or background. However, when the app is force-closed (swiped up from multitasking), the Notification Service Extension does not seem to run. As a result, the custom sound is not downloaded or played. I would like to confirm: Is it possible to trigger the Notification Service Extension when the app is killed? If not, what is the correct way to play a custom .caf sound when the app is terminated? Should I preload and save the .caf file in App Group storage and reference it by name in the sound field? Are there any best practices or limitations regarding push notification customization when the app is killed? I appreciate your help in clarifying this issue. Thank you very much! Best regards, Phan Van Tung
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Apr ’25
Device token not being extracted - iOS app registered for push notifications but callback methods not called
Background: The project was created in Xcode 5, then recreated in new Xcode. Before migration, push notifications worked without issues, after migration device token stopped being extracted. Problem: iOS app registers for push notifications, but didRegisterForRemoteNotificationsWithDeviceToken or didFailToRegisterForRemoteNotificationsWithError methods are not being called. Current situation: App is registered for push notifications (isRegisteredForRemoteNotifications = true) Notification permissions are granted Entitlements are configured correctly (aps-environment: development) Bundle ID: com.autoserviceonline.app Team: BUSINESSVISION COMPANY, TOO (NS3FSG45V7) But callback methods are not being called What I've already tried: Deleted and recreated all App IDs in Apple Developer Portal Cleared Xcode cache and derived data Created new APNs certificates and provisioning profiles Removed "ghost" certificate from Keychain Access Problem persists Additional information: Also noticed that Push Notifications Console opens non-existent project "BV.TestSwiftData" with Personal Team instead of current corporate App ID com.autoserviceonline.app. These issues might be related to project migration from old Xcode. Request: Why iOS doesn't call callback methods for device token, although registration was successful?
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Jul ’25
Real-time notification
I need to create a background notification that counts down time and uses buttons to add or subtract time. Currently, I'm developing in React Native and using Expo Go to develop my app. I managed to display a simple notification, but I can't get it to work in real-time, so that when the time is up, it emits a sound indicating that the break is over. How can I implement this feature? My application now: My goal:
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Nov ’25
APN push notifications failling
After my membership was renewed (auto-payment was rejected, and my account was manually paid), my app stopped receiving notifications I thought was an invalidation by membership but after some days, my app kept not receiving notifications. I just recreated a new key for my app, (I hope it solves the problem) My question is, do I need to make another change to my account to reenable services?
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211
Jan ’25
Can I listen to user choice when asked for update permissions on Live Activity?
We would like to better understand the discrepancy between a Push To Start and the subsequent Updates where I see a number of recipients drop greatly. Our assumption is that this is a result of the end user not clicking the "Allow" prompt when a push to start widget is shown on the screen for the first time, but we currently do not have a way to listen to the user's choice when prompted. Is there any way of tapping into this, to determine if this is in fact where the variance is coming from, or if there is actually just a problem with the request to retrieve the update token from our end?
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77
Apr ’25
iOS 18 Sending Duplicate Push Notifications
When sending a single push notification to iOS 18 devices users receive the same notification multiple times. This issue appears specific to iOS 18 and was not observed in previous iOS versions Our server logs confirm each notification is sent only once. Notification payloads include proper apns-id values for identification and no network issues detected on our side
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Jul ’25
App notifications are failing to trigger
Facing issue while sending push notification through the application. The APNs certificate is valid. Below is the error log. System.AggregateException: One or more errors occurred. ---> PushSharp.Apple.ApnsNotificationException: Apns notification error: 'ConnectionError' ---> System.IO.IOException: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host at System.Net.Sockets.Socket.EndSend(IAsyncResult asyncResult) at System.Net.Sockets.NetworkStream.EndWrite(IAsyncResult asyncResult) --- End of inner exception stack trace --- at System.Net.Security._SslStream.EndWrite(IAsyncResult asyncResult) at System.Net.Security.SslStream.EndWrite(IAsyncResult asyncResult) at System.IO.Stream.<>c.b__53_1(Stream stream, IAsyncResult asyncResult) at System.Threading.Tasks.TaskFactory1.FromAsyncTrimPromise1.Complete(TInstance thisRef, Func3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at PushSharp.Apple.ApnsConnection.<SendBatch>d__21.MoveNext() --- End of inner exception stack trace --- at PushSharp.Apple.ApnsServiceConnection.<Send>d__2.MoveNext() --- End of inner exception stack trace --- ---> (Inner Exception #0) PushSharp.Apple.ApnsNotificationException: Apns notification error: 'ConnectionError' ---> System.IO.IOException: Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host at System.Net.Sockets.Socket.EndSend(IAsyncResult asyncResult) at System.Net.Sockets.NetworkStream.EndWrite(IAsyncResult asyncResult) --- End of inner exception stack trace --- at System.Net.Security._SslStream.EndWrite(IAsyncResult asyncResult) at System.Net.Security.SslStream.EndWrite(IAsyncResult asyncResult) at System.IO.Stream.<>c.<BeginEndWriteAsync>b__53_1(Stream stream, IAsyncResult asyncResult) at System.Threading.Tasks.TaskFactory1.FromAsyncTrimPromise1.Complete(TInstance thisRef, Func3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at PushSharp.Apple.ApnsConnection.d__21.MoveNext() --- End of inner exception stack trace --- at PushSharp.Apple.ApnsServiceConnection.d__2.MoveNext()<---
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May ’25
Which apns errors should cause us to remove the tokens from our server's db?
Having some discussion about when we should clear out a token from our servers. Docs say: Don’t retry notification responses with the error code BadDeviceToken, DeviceTokenNotForTopic, Forbidden, ExpiredToken, Unregistered, or PayloadTooLarge. You can retry with a delay, if you get the error code TooManyRequests. The way I see it is that with the exception of PayloadTooLarge, all other errors means you should remove the token from your server. Either because: The token is no longer good The token is good, but this is just not the right: environment (sandbox vs production) topic (the token is from a different bundle id or developer team) target (app vs live activity appex) Do I have it right? Extra context: when using the "JSON Web Token Validator" tool, a colleague reported that a 410 -Expired token (from couple days back) was still valid today. This raises questions about when tokens should actually be deleted and how these error codes should be interpreted. Also is it possible for the docs to get updated for us to explicitly know if a token should get removed and not leave it for interpretation?
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Nov ’25
How can notification action buttons' text be center aligned?
The iOS documentation shows notification actions buttons with the text center aligned: https://developer.apple.com/documentation/usernotifications/declaring-your-actionable-notification-types But there's no apparent way for an app to control this. The buttons are controlled and rendered by the system and the text is always left aligned. Is there some way to get the text center aligned?
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73
Aug ’25
Clarification on Timing for Critical Alerts Approval in iOS
We are currently planning the development of an iOS healthcare application that will require the use of Critical Alerts. I understand that these notifications bypass Do Not Disturb and Silent mode, and therefore require special entitlement from Apple. We understand that Critical Alerts require a special entitlement from Apple. Could you please clarify: Do we need to request and obtain Apple’s approval for Critical Alerts before we begin development of the app? Or can we apply for this entitlement after we have a working build or prototype ready? We want to ensure compliance and streamline our development process, so any guidance on the appropriate timing for the entitlement request would be greatly appreciated.
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Jul ’25