iOS 10 silent push notification not triggering backgrounded app

Question

I have an app in which I'm trying to receive and handle SILENT push notifications.

I'm registering for APNs as follows:

UNUserNotificationCenter.currentNotificationCenter().delegate = self
UNUserNotificationCenter.currentNotificationCenter().requestAuthorizationWithOptions([.Badge, .Sound, .Alert]) {(granted, error) in
    if granted {
        application.registerForRemoteNotifications()
    }
}

Implemented:

func userNotificationCenter(center: UNUserNotificationCenter, didReceiveNotificationResponse response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void) {
    // Handle notification
}

func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void) {
    // Handle notification
}

The app has UIBackgroundModes fetch and remote-notification

The APN content looks like:

{
    "aps":{
        "content-available":1,
        "badge":0
    },
    "action":"shareDelete",
    "shareId":633
}

When the app is in the foreground, userNotificationCenter(centre:withCompletionHandler:willPresentNotification) is fired when the notification is received, but when the app is backgrounded, nothing happens.

I can see the APN is received by changing the badge number, but nothing is triggered in app.

What am I missing?

(Also asked on Apple dev forums)

Answer 1

Method

func userNotificationCenter(center: UNUserNotificationCenter, didReceiveNotificationResponse response: UNNotificationResponse, withCompletionHandler completionHandler: () -> Void) {
    // Handle notification
}

called when user taps on notification or check it on Apple Watch:

Called to let your app know which action was selected by the user for a given notification.

You need to implement the old method

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {

}