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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1.1k
Nov ’25
[App Store Server Notifications] ONE_TIME_CHARGE production release...
Dear Apple! During WWDC24 you announced that ONE_TIME_CHARGE notification is available on the sandbox environment and will be available "it will be available in production later this year" - it's March 2025 and there is still no production release of this feature. Could you share some timeline and plans for when we can expect that feature deployed to production? Thanks in advance!
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93
May ’25
Questions for AlarmKit
We are so interested in AlarmKit which is presented at WWDC25. While we planning our app using AlarmKit, We had a few questions come to mind and were hoping you could provide some clarity. Please excuse the rather long list of questions, as we don't currently have a device available to test these features ourselves. System Actions Related Is there a limit to the number of alarms that can be scheduled using AlarmKit? Are alarms scheduled with AlarmKit persistent across device reboots? When an alarm is dismissed (either by swiping or pressing the power button), can our app detect this action and execute code in response? Can we control the behavior of the physical Lock Screen buttons when an AlarmKit alarm is active, for instance, to trigger a snooze action? Does AlarmKit function correctly during Do Not Disturb or Low Power Mode? What is the expected behavior when an alarm from our app (using AlarmKit) overlaps with an alarm from another app that also uses AlarmKit? Which one is going to get its priority? Thank you for your help. Sincerely
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247
Aug ’25
AlarmKit alarms do not fire when foregrounded app is in landscape
Hello! When setting an alarm in an AlarmKit app, the alarm will not fire properly/reliably (the alert presentation is not shown) while the device has an app foregrounded in the landscape orientation. This behaviour has been present since the betas, however until the first party Reminders app showed the behaviour in the iOS 26.2 beta I suspected the issue was in my own code. The behaviour is exhibited when scheduling alarms in several AlarmKit apps: The Reminders app The AlarmKit WWDC Demo Project My own AlarmKit app However alarms scheduled by the stock Clock app do not seem to exhibit the behaviour. Minimal repro with first party app: Be using iOS 26.2 beta Open Reminders app Create an urgent reminder for a time in the not too distant future Open Mail.app Change to landscape orientation Wait for the fire time Observe the phone vibrates at the correct time but no alarm is fired Drag the notifications pane down, observe the LiveActivity has been started Change to portrait orientation Observe alarm fires I have noticed this behaviour from the AlarmKit apps mentioned while foregrounding other apps besides Mail, both first and third party: Photos YouTube Netflix The behaviour does not seem to occur when the foregrounded app is restricted to portrait mode, no matter the actual orientation of the device. In the case of my own app I have tried a multitude of ideas to get it to work reliably, getting alarms to fire in landscape is very intermittent at best and most often works after a fresh reboot. I've submitted a Feedback for the Reminders app: FB20956492. Any advice or suggestions would be appreciated!
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189
Nov ’25
Timestamp with 410 error code
Docs mention the following about the timestamp field returned by APNs: "The time, represented in milliseconds since Epoch, at which APNs confirmed the token was no longer valid for the topic. This key is included only when the error in the :status field is 410." We would like to clarify whether this timestamp is subject to the fuzzy schedule or whether it represent the accurate time of when APNs knew that the token became invalid? We understand that using 410 for tracking purposes is off label. However we still would like to have the most accurate information in regards to when token became invalid. This will help us debug user issues better in cases when they re-install, uninstall, change permission settings, etc.
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189
Aug ’25
What is the point of thread-id/grouping in push notifications if grouping depends upon user preferences?
There's plenty of articles out there about programatically grouping push notifications. However I have tried setting the thread-id in the push payload when sending a push, or setting the threadIdentifier for a received push in a notification service extension to be the same for several pushes. But if within the iPhone Settings / Notifications the user selects to display pushes as List and turns off Notification Grouping, then each notification resulting from the push appears on its own separately. Is there something other than thread-id/threadidentifier that is used to programmatically group them? If not then whats the point of these as grouping and display is actually under the control of user.
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101
Mar ’25
APNs Notifications Always Failing – 0-Byte Response
Hello, We are currently facing a persistent issue where Apple Push Notifications (APNs) are no longer being delivered to devices. This is not an intermittent problem — push notifications have completely stopped working. We are using PushSharp.Apple (Version 4.0.10.0) to send the notifications. Current Behavior (Failing): Every notification request appears to be processed successfully from the server side. However, the APNs client receives a 0-byte response, and the server closes the connection. Devices do not receive the notifications at all. Logs from Current (Failing) State: APNS-Client[1]: Connected (Batch ID=1) APNS-Client[1]: Sent Batch, waiting for possible response... APNS-Client[1]: Received 0 bytes response... APNS-Client[1]: Server Closed Connection... APNS-Client[1]: Disconnected (Batch ID=1) For Reference – Successful Log From Earlier (When Notifications Worked): APNS-Client[1]: Connected (Batch ID=1) APNS-Client[1]: Sent Batch, waiting for possible response... APNS-Client[1]: Received -1 bytes response... Push Notification Successfully Sent to Device Any help, suggestions, or experience with similar issues would be greatly appreciated. Thanks!!!
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178
May ’25
Live activity push is not work
Hey there,i start a live activity,but it not works, and sometime it can work; apns-unique-id 46445cfa-1bf6-0f63-5ea3-2afa53e02b0d and it show that " 2025年5月19日 GMT+8 15:13:25.836 received by APNS Server 2025年5月19日 GMT+8 15:13:26.244 discarded as application was not registered" but i did not know how can i do; thanks for you help
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104
May ’25
React Native iOS - Notification Service Extension Not Working
I've added a Notification Service Extension as a target to my React Native iOS app following Apple's official documentation. After completing all the setup steps as outlined in the documentation, the notification titles remain unchanged - notifications are arriving without any modifications, suggesting the extension isn't functioning properly.Testing Details: Sending notifications via Apple Push Notification Console Tested on iPhone 16 Pro Max (physical device) Tested on iPhone 15 Pro simulator Both show the same issue - no title modifications The extension appears to not be executing at all. Has anyone encountered similar issues with Notification Service Extensions in React Native projects, or can suggest troubleshooting steps to verify the extension is properly configured and running?
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106
Aug ’25
iOS 26 Notification Extension open(uri) Fails on Cold Start (LSApplicationWorkspaceErrorDomain Code=115)
I'm experiencing a critical regression on iOS 26 with a Notification Content Extension. extensionContext.open(uri) fails to open external URLs with LSApplicationWorkspaceErrorDomain Code=115 under specific conditions. Problem: When the main app is killed, and a rich push notification is received and expanded, tapping a button (specifically one with a transparent background, cornerRadius=0, clipsToBounds=false) fails to open its associated URL. Key Details: iOS 26 Only: Works perfectly on iOS 17, 18, etc. App Killed State Only: Works if the app is running (foreground/background). Works on Subsequent Notifications: The link will open if a second notification is received. LSApplicationQueriesSchemes: Confirmed to be correctly configured in the main app's Info.plist and present in the app bundle. Delay No Help: Adding a 1s delay before open(uri) does not fix it. My os_log statements confirm the button tap
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197
Nov ’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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109
Nov ’25
Notification Service Extension Not Working
I've added a Notification Service Extension as a target to my React Native iOS app following Apple's official documentation. After completing all the setup steps as outlined in the documentation, the notification titles remain unchanged - notifications are arriving without any modifications, suggesting the extension isn't functioning properly.Testing Details: Sending notifications via Apple Push Notification Console Tested on iPhone 16 Pro Max (physical device) Tested on iPhone 15 Pro simulator Both show the same issue - no title modifications The extension appears to not be executing at all. Has anyone encountered similar issues with Notification Service Extensions in React Native projects, or can suggest troubleshooting steps to verify the extension is properly configured and running?
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244
Aug ’25
Weather Notifications
I'm strugling about the way how to code notifications for my weather aplication. I use data from my server that receives weather changing values from my own weather station and want to notify user of my app when eg strong wind will blow or temperature go under eg 3℃ etc. The weather station has 8 sensors so there is sometimes a lot of data changing in particular minute that i set to parse data from server and notify user about it. But the notifications only works only when app is on and couple minutes after locking display. So please what could i use strategy for the app to works even when the app sleeps ?
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100
Mar ’25
APNs Feedback Service Domain Unavailable
The APNs Feedback Service domain “feedback.push.apple.com” was deprecated on March 31, 2021, and became unavailable after August 2025 due to domain name resolution failures. Will this feedback service become available again in the future? Also, is it possible to use the APNs Feedback Service with a domain different from “feedback.push.apple.com”?
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73
Sep ’25
Expected behavior for a Notification Service Extension with notification filtering when requestAuthorization has not been requested
If there is a Notification Service Extension which has the com.apple.developer.usernotifications.filtering entitlement, then does/how having that entitlement affect the preconditions for the NSE to be delivered a push? Specifically, if the app has not prompted for requestAuthorization() is it expected that the push will be delivered to the NSE or not? Thank you
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150
Sep ’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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176
Sep ’25
Notification easy control
Dear Apple Team, I hope this message finds you well. I wanted to share a playful and innovative idea that could enhance the iPhone experience—particularly when viewing content in full-screen mode through apps like Apple TV or YouTube. Feature Concept: Hands-Free Dismissal of Notifications When the iPhone is in landscape mode, incoming notifications can interrupt the viewing experience. While Focus Mode and swipe gestures help, I thought of a more intuitive and hands-free interaction: using a light puff of air directed toward the screen to dismiss a notification. This interaction could use the microphone or other onboard sensors to detect a brief burst of air, providing a fun and natural way to maintain immersion without touching the device. If this isn’t feasible with current hardware, here are a few alternative concepts that align with the same goal: Blink to Dismiss: Using Face ID sensors to detect a quick blink as a hands-free gesture. Shake to Dismiss: A gentle shake gesture when holding the iPhone in one hand. Gaze-Based Dismissal: Notifications automatically disappear after a brief moment of eye contact. These ideas could offer both accessibility benefits and a touch of delight—making the iPhone feel even more magical and responsive. Thank you for your time and for considering this suggestion! Warm regards, Badhan Baidya
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157
Sep ’25
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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106
May ’25