Local notifications in iOS Swift - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a local notification in iOS?

A local notification is a message that an app schedules and delivers on the same device to alert the user, even if the app is not running in the foreground.

beginner

Which iOS framework is used to manage local notifications?

The UserNotifications framework is used to schedule and manage local notifications in iOS.

beginner

What permission must an app request to show local notifications?

The app must request authorization from the user to display alerts, play sounds, or badge the app icon using UNUserNotificationCenter's requestAuthorization method.

intermediate

How do you schedule a local notification to trigger after 5 seconds?

Create a UNTimeIntervalNotificationTrigger with a time interval of 5 seconds and set repeats to false, then add a UNNotificationRequest with this trigger to UNUserNotificationCenter.

intermediate

What is the role of UNNotificationRequest in local notifications?

UNNotificationRequest represents the notification to be delivered. It includes an identifier, content (title, body, sound), and a trigger that defines when to deliver the notification.

Which class do you use to request permission for local notifications in iOS?

A UNUserNotificationCenter

B UIApplication

C UNNotificationRequest

D UNNotificationContent

UNUserNotificationCenter handles notification permissions and scheduling.

What does UNTimeIntervalNotificationTrigger do?

A Cancels a notification

B Triggers a notification at a calendar date

C Requests notification permission

D Triggers a notification after a time interval

UNTimeIntervalNotificationTrigger schedules a notification after a specified number of seconds.

Which method schedules a local notification?

A add(_:withCompletionHandler:)

B requestAuthorization(options:completionHandler:)

C removePendingNotificationRequests(withIdentifiers:)

D getNotificationSettings(completionHandler:)

add(_:withCompletionHandler:) adds a notification request to the notification center.

What must you include in UNNotificationContent?

A Only title

B Title, body, sound

C Only sound

D Only badge number

UNNotificationContent includes title, body, sound, and other info to display in the notification.

Can local notifications be delivered if the app is closed?

A Only if the app is in background

B No, app must be open

C Yes, local notifications work even if the app is closed

D Only if the app is running in foreground

Local notifications are delivered by the system regardless of app state.

Explain the steps to schedule a local notification in iOS.

Think about what you need before showing a notification and how to tell the system when to show it.

Describe how you handle user permission for local notifications and why it is important.

Consider privacy and user control over notifications.