While mutable push notifications process properly in a cousin Catalyst/iOS app, my macOS app does not execute methods in its Notification Service extension to mutate notification content before presentation (when app is active, in background, or terminated).
Console logs (below) show the Mac extension is found and launched, but then killed for "sluggish startup". It is the vanilla new file stub with zero dependencies. I'm doubtful this matters, but I am running Monterey RC1/Xcode 13 RC on an M1.
What am I configuring improperly?
Objective
Push a remote notification ~once a month to download a file, locally process user data, and then silence or display a modified alert accordingly.
I've Tried
Per macOS Notification Service Extension not being used
Ensured sandboxed
Enabled "Incoming Connection (Server)" (no difference)
Wipe DerivedData
Run on naive second Mac
Per Notification Service Extension Not working
Rebooting the Mac
Ensuring the deployment target of the app and extension are identical
Received Notification
From application(_ app: NSApplication, didReceiveRemoteNotification userInfo: [String : Any])
["customThing": value, "aps": {
alert = "Push Mutable";
"mutable-content" = 1;
sound = default;
}]
Signing/Capabilities
App Debug/Release
Sanboxed w/ outgoing connections
Hardened runtime
iCloud
Push (certificates)
Automatic signing w/ cert
Notifications Extension
Sandboxed
Hardened runtime
Automatic signing
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)
if let bestAttemptContent = bestAttemptContent {
bestAttemptContent.title = "[modified]"
bestAttemptContent.body = "Changed"
contentHandler(bestAttemptContent)
}
}
override func serviceExtensionTimeWillExpire() {
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
Console
Perhaps relevant?
usernoted <IDENTIFIER> Extension will be killed due to sluggish startup error serviceExt com.apple.unc usernoted
LogFromBuildToNotificationPush.txt
