---
title: Processing queued notifications
framework: uikit
role: article
role_heading: Article
path: uikit/processing-queued-notifications
---

# Processing queued notifications

Respond to notifications when coming out of the suspended state.

## Overview

Overview When settings or device conditions change, the system generates notifications so that apps can respond accordingly. These notifications are delivered immediately to apps that are running, but their delivery is delayed for apps that are suspended. For a suspended app, pending notifications are delivered as soon after the app begins running again (either in the foreground or in the background). The following table lists the notifications that apps can receive after they start running again. You must explicitly add an observer to these notifications to receive them. The system coalesces multiple related notifications so that the app receives only one notification with the net changes.  |   |   |   |   |   |   |   |   |   |   |  When a suspended app starts running again, the system delivers any queued notifications on the app’s main thread before it delivers any touch events or user input. Handle all notifications as quickly as possible.