Notification Service

Notification Service

NOTIFICATION SERVICE EXTENSION: SETUP: Requires separate extension target (kind: "notification_service" in plan extensions array). Used to modify rich push notification content before display (add images, decrypt payload, etc.).

PRINCIPAL CLASS (in extension): class NotificationService: UNNotificationServiceExtension { var contentHandler: ((UNNotificationContent) -> Void)? var bestAttemptContent: UNMutableNotificationContent?

override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) { self.contentHandler = contentHandler bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

guard let bestAttemptContent else { contentHandler(request.content); return }

// Modify content here — e.g., download and attach image if let urlString = request.content.userInfo["image_url"] as? String, let url = URL(string: urlString) { downloadAndAttach(url: url, to: bestAttemptContent) { modified in contentHandler(modified) } } else { bestAttemptContent.title = "[Modified] " + bestAttemptContent.title contentHandler(bestAttemptContent) } }

override func serviceExtensionTimeWillExpire() { // Called just before extension is killed — deliver best attempt if let contentHandler, let bestAttemptContent { contentHandler(bestAttemptContent) } } }

ADDING ATTACHMENT: func downloadAndAttach(url: URL, to content: UNMutableNotificationContent, completion: @escaping (UNNotificationContent) -> Void) { URLSession.shared.downloadTask(with: url) { localURL, , in if let localURL, let attachment = try? UNNotificationAttachment(identifier: "image", url: localURL) { content.attachments = [attachment] } completion(content) }.resume() }

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: Abdullah4AI
• Source: Abdullah4AI/apple-developer-toolkit
• License: MIT

Install and usage instructions live in the source repository linked above.