Tvos Remote Notification Replacement

TVOS remote notification replacement

What part of the registration errors out for you? Notification dialogs and banners may not really make sense on tvOS, but can you send a silent push notification? All you need to do to register for these is

[application registerForRemoteNotifications];

You do not need to display the request dialog to the user for permission for silent notifications (you do need to have the remote notifications entitlement though.)

According to Apple's documents here, they allow CloudKit. CloudKit subscriptions rely on silent push notifications that I would assume would work on tvOS (without them it would severely cripple CloudKit)

If that still does't work, then you could create your own long polling connection (essentially, you would be making your own custom push notifications). It would only be able to send messages to devices that have the app opened however.

Apple Push Notifications in tvOS

tvOS supports only 2 types of notifications: badges and content-available. So you need to send one of these two types to APNS. Any of these types notification only changes badge number on App Icon. And only the lastest notification will be delivered to your application when you open the app. There is no visual presentation of notification as it was on iOS
How it looks see on presentation from WWDC 2016/Session 206/tvOS, start watching from 21:20

UPDATE:
On tvOS 11 appeared Silent notifications which wakes the application up and allow to refresh content in background

WWDC 2017 watch from 7:50

How to detect touches on UIViewController on tvOS

You can use touchesBegan and touchesEnded just like on iOS.

Can an iOS push notification selectively replace a prior notification?

Link: Local and Push Notification Programming Guide:

Quality of Service

Apple Push Notification service includes a default Quality of Service
(QoS) component that performs a store-and-forward function.

If APNs attempts to deliver a notification but the device is offline,
the notification is stored for a limited period of time, and delivered
to the device when it becomes available.

Only one recent notification for a particular application is stored.
If multiple notifications are sent while the device is offline, each
new notification causes the prior notification to be discarded. This
behavior of keeping only the newest notification is referred to as
coalescing notifications.

If the device remains offline for a long time, any notifications that
were being stored for it are discarded.

How to detect volume button press on tvOS remote

It is not clear all other code, but you have to keep reference to created observer.

Here is possible solution (tested with Xcode 12.1)

private var observer: NSKeyValueObservation?

// ... other code

self.observer = audioSession?.observe(\.outputVolume) { [weak self] (audioSession, _) in
    guard let `self` = self else { return }
    let mute = audioSession.outputVolume
    
    var isMuted = false
    if (mute == 0) && (!self.player.isMuted) {
        isMuted = true
    } else if (mute.isZero) && (self.player.isMuted) {
        isMuted = false
    }
    
    // do what's needed here with `isMuted`
}

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