init(identifier:content:trigger:)

Declaration

convenience init(identifier: String, content: UNNotificationContent, trigger: UNNotificationTrigger?)

Parameters

• identifier:

  An identifier for the request; this parameter must not be nil. You can use this identifier to cancel the request if it’s still pending (see the Removependingnotificationrequests(withidentifiers:) method).

• content:

  The content of the notification. This parameter must not be nil.

• trigger:

  The condition that causes the system to deliver the notification. Specify nil to deliver the notification right away.

Return Value

A new notification request object.

Discussion

Use this method when you want to schedule the delivery of a local notification. This method creates the request object that you subsequently pass to the add(_:withCompletionHandler:) method.

The system uses the identifier parameter to determine how to handle the request:

• If you provide a unique identifier, the system creates a new notification.

• If the identifier matches a previously delivered notification, the system alerts the user again, replaces the old notification with the new one, and places the new notification at the top of the list.

• If the identifier matches a pending request, the new request replaces the pending request.