In your developer account, enable the push notification service for the App ID assigned to your project. Notification Service Extension is useful for storing notification data in the background mode or when inactive.In this tutorial, we'll show you how to add push notifications to your iOS app for free using OneSignal. This object lets you customize the content of a remote notification before the system delivers it to the user. In this codelab, you'll add push notifications to an iOS app with Firebase Cloud Messaging. To create a notification service extension , navigate to File > New > Target in Xcode and select Notification Service Extension. Then in the next menu, under iOS, Filter "service" and choose Notification Service Extension like so: Filtering Notification Service Extension. On your journey to prosperity, let us be your guide. Connect with a local financial expert today and find an account that fits you. You can have up to three vehicles on the same TollTag account at no extra charge.