9. Notifications
Notifications are Apple’s method of keeping the user informed of important iOS app-related events when you are not actively using an app. Because only one iOS app can be active and in the foreground at a time, notifications provide a mechanism to have inactive apps receive important and time-sensitive information and notify the user. This chapter will guide you through how to set up your app to receive local and remote push notifications, and how to customize what happens when the user receives a notification with an app badge, a sound, and a message. This chapter will also guide you through how to set up your own Ruby on Rails server to respond to events and push out notifications.
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