Notifications

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

Notifications Documentation

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Push Notifications and VOIP call not working.
My App supports two services that is Push Notification for Alerts and a Voip Call feature whose notification also comes in the same way as of PushNotification but video rendering is done with GoogleWebRTC. The App was working perfectly fine but from past few months these services are not working.[ Nothing is changed in App and on the server side to push the notifications] Issues: VoIP (Video call) not working: I have apns certificate which is valid in today's date and stays with the backend Server. My server sends the payload notification to APNS but on iPhone am unable to receive it. I have checked the App registration part also and is able to receive the token for the same. Framework used are: PushKit, UserNotifications, GoogleWebRTC . I don't understand where is the gap, the backend triggers the APNS but there no response. Ports enabled on server are: 443, 5223, 2197, 2195, 2196. Similarly Push notification were also not working, So I tried to change it to register on Firebase for device registration token And did some coding at backend to send the notification to that device. It was working perfectly fine from last few weeks, but it suddenly stopped. I checked the JSON Payload and tried to send it through PostMan, in both it says 200 Success. And in Application end am waiting for breakpoint to hit in userNotificationCenter(_: , willPresent, completionHandler). What all I have checked: 1)My server to APNS server connectivity. 2)Verified the apns certificate. The certificate was created in October 2024, whose expiry is in Nov 2025 and it support both Sandbox and Production environment. 3)Checked required delegates are implemented in App. With the capability enable in it, is also sending registration token to backend. Kindly guide me where I can check in this flow. Thanks in Advance!
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107
Jul ’25
Notifications not working
I’m receiving notifications from all third-party apps that I use however, most of the time there is no sound or haptics with the notification. In some cases, very seldomly I will receive a sound when a notification comes in, but that’s only with one of the many third-party apps that I use. I’ve spoken to Apple about this when this whole problem started during an update that you guys rolled out sometime between September and November 2024. They blamed it on the app programmers but I think at this point we all know that it’s Apple’s inability to accept that the problem is on their end. I never had problems receiving notifications from any of the apps prior to that. I guess my question is will Apple ever fix this or are they going to sweep it under the rug and pretend like it doesn’t exist?
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249
Jul ’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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98
Jul ’25
Push notification volume for custom sound
Is there a way to configure the APNS notification sound volume to be louder? I am implementing some custom sounds(narrative sentences) for APNS, it does play the custom sound, but the volume of the custom sound is not loud enough even though I had set the device's volume and "RingTone and Alerts" volume to max. I tried to amplify the custom sound file, it does play louder but the result is minimum if I want to maintain the quality of the sound without it been distorted. I tried to use Notification Service Extension, AVAudioPlayer and AVAudioSession to play the sound, it does play louder in max volume compare with relying on default sound payload in APNS, but the problem is AVAudioPlayer and AVAudioSession do not seems to be usable when the application is in background or killed state, is there any other alternative I could use?
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197
Apr ’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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146
Apr ’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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97
Jul ’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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80
Jul ’25
Problem receiving Remote Notification in the background after Review Rejected
I created an app. One if its functionalities is receive Remote Notification in the background, while app is monitoring Significant Location Changes (SLC). This functionality worked fine. I was receiving these notifications correctly. Sometimes instantly, sometime with small or large delay. And then I send the app for review. It was rejected with 3 remarks: The app or metadata includes information about third-party platforms that may not be relevant for App Store users, who are focused on experiences offered by the app itself (I wrote that app communication works both for iOS and Android.) The app declares support for audio in the UIBackgroundModes key in your Info.plist but we are unable to locate any features that require persistent audio. EULA (End User License Agreement) is missing for in-app purchases. After the rejection the app is no longer receiving these notifications. They are there, since the app receives them, when I open app, or significant location change is detected. It also works, when I run the app directly from Xcode (in debug mode), not from TestFlight nor in Sandbox. It seem to me like Apple somehow spoiled my background capabilities on purpose or accidentally. Is it possible? What can I do with it? Is it the case that I should just fix the review remarks and send the app back to review, and once the app passes it, it will work again? Or should I not count on it? Any suggestions? I asked Apple using: https://developer.apple.com/contact/topic/#!/topic/select but so far no response.
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179
Aug ’25
/The notifications/test request was successful, but there were no notification messages from the Apple Store
requestUrl:https://api.storekit-sandbox.itunes.apple.com/inApps/v1/notifications/test method:Post responseCode:200 testNotificationToken:06beba6c-7587-44f6-a4b8-f12b11db6061_1745832671126 Request environment: ①APP from: TestFlight ②Apple acount : Sandbox account ③Apple originalTransactionId: 2000000907966801 App Store sandbox server notification configuration is fine(https://*.com/v2/apple_refund_notify), I have tried many times, but have not received any notification from Apple. Is this API not working?
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142
Apr ’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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86
Aug ’25
Getting VoIP notifications to work and use iOS call UI when phone is locked/app is in background/Not running
Hey there my application allows users to have video calls with each other using Agora. I have successfully set up incoming call functionality on Android but on iOS I am struggling to get the call ui to appear when the app is not running/in background/locked. To my knowledge this is because there is much stricter security on iOS which is limiting me from calling this. When i initially set it up it worked at first when the app was in the background but I think I was failing to report the call to call kit in time and now it's not working. I'm not sure if I need access to this entitlement: com.apple.developer.pushkit.unrestricted-voip Which i believe is only for the big boys or if I make sure I'm reporting the call to call kit fast enough that I won't encounter this issue and it will consistently work in the background.
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235
Mar ’25
Silent Push Notification Handling Behavior
I'm observing that when a silent push notification is sent to our app, is is started up in the background for 30 seconds before being suspended until the app is launched by the user. This causes data to persist from the silent push notification to the user app launch. I couldn't find documentation on this behavior for silent push notifications, and was wondering if it's possible to have the app terminate after handling the silent push notification. Is there documentation on the general flow of silent push notifications as well? I'm able to handle the edge cases if the app has to be suspended until user launch, but just want to confirm that this is the expected behavior before I go about handling it this way.
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118
Apr ’25