---
title: "init(identifier:content:trigger:)"
framework: usernotifications
role: symbol
role_heading: Initializer
path: "usernotifications/unnotificationrequest/init(identifier:content:trigger:)"
---

# init(identifier:content:trigger:)

Creates a notification request object that you use to schedule a notification.

## Declaration

```swift
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 doc://com.apple.usernotifications/documentation/UserNotifications/UNUserNotificationCenter/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

Return Value A new notification request object.

## Discussion

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.