iOS push notification 🚀

[onmyway133]

iOS app not show in Settings -> Notifications

• It seems after app is deleted, currentUserNotificationSettings categories is remember

Check if user has enabled push notification

• Check currentUserNotificationSettings
• User can disable types at any time, so next time, check for push device token also. Or for sure, check for a flag in user defaults

User disable Allow Notifications in settings

• didFailToRegisterForRemoteNotificationsWithError is called with

Error Domain=NSCocoaErrorDomain Code=3000 "no valid 'aps-environment' entitlement string found for application" UserInfo={NSLocalizedDescription=no valid 'aps-environment' entitlement string found for application}

• didRegisterForRemoteNotificationsWithDeviceToken not called

User disables Sounds (.Sound), Badge (.Badge), Alert Style When Unlocked (.Alert)

• types is None

Call registerForRemoteNotifications() without registerUserNotificationSettings

• device token

Call registerForRemoteNotifications

• didRegisterForRemoteNotificationsWithDeviceToken is called

If your application has previously registered, calling registerForRemoteNotificationTypes: results in the operating system passing the device token to the delegate immediately without incurring additional overhead

Call registerUserNotificationSettings

• didRegister notificationSettings

The first time you register your settings, iOS waits for the user’s response before calling this method, but on subsequent calls it returns the existing user settings

[onmyway133]

Troubleshooting

• Enabling Push Status Messages on iOS
• https://developer.apple.com/library/content/technotes/tn2265/_index.html

Once the user has responded to this alert it is not presented again unless the device is restored or the app has been uninstalled for at least a day.

[onmyway133]

Error Domain=NSCocoaErrorDomain Code=3000 "no valid 'aps-environment' entitlement string found for application" UserInfo={NSLocalizedDescription=no valid 'aps-environment' entitlement string found for application}

• http://support.iterable.com/hc/en-us/articles/212157066-iOS-10-Debugging-Push-Notifications-Not-Registering

For Xcode 7, sometimes it caches or something, but toggling and disable push notification in Capabilities tab fixes the problem (and maybe run it). It won't change our entitlement, but toggle a flag in project file http://stackoverflow.com/questions/39554177/xcode-8-the-aps-environment-entitlement-is-missing-from-the-apps-signature-on

[onmyway133]

Device token

• On iOS 9+, device token seems to change for every app install. Xcode 8 iOS 10 #211
• https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/IPhoneOSClientImp.html#//apple_ref/doc/uid/TP40008194-CH103-SW1

Device tokens can change, so your app needs to reregister every time it is launched and pass the received token back to your server

• https://developer.apple.com/library/content/technotes/tn2265/_index.html

Your app should always ask for the device token by registering with the push service each time it is launched. Don't store a device token from your app and try to reuse it, because the token can change. Your provider should then pass that same token on to the push service.

[onmyway133]

• Universal Push Notification Client SSL Certificate https://developer.apple.com/library/content/documentation/IDEs/Conceptual/AppDistributionGuide/AddingCapabilities/AddingCapabilities.html#//apple_ref/doc/uid/TP40012582-CH26-SW11
• APNS topic https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/APNsProviderAPI.html

[onmyway133]

Test push

• https://github.com/noodlewerk/NWPusher
• https://github.com/acoomans/SimulatorRemoteNotifications

[onmyway133]

isRegisteredForRemoteNotifications - UIApplication.shared.currentUserNotificationSettings

iOS 9.3.2, 10.1

• Haven't trigger push request dialog: false - none
• Enable push for app upon permission request: true - alert, badge, sound
• Turn off push for app: true - none
• Turn on push, enable only alert: true - alert
• Uninstall and install again (within 24 hours): false - none
• Deny upon asking upon permission request: true - none
• Reenable push after denial: true - alert, badge, sound