The feature is enabled by default and can be configured in the iOS Settings app under Notifications Apple TV Remote Keyboard. From here, users can opt to allow notifications, show alerts in notifications center, enable sounds, activate lock screen access and select their desired alert style. My Apple TV 4 is updated to the latest tvOS. Change Notifications preferences on Mac. On your Mac, use Notifications System Preferences to specify when you don’t want to be disturbed by notifications, and to control how apps show notifications and how they’re sorted in Notification Center. Music, TV, and podcasts take center stage. ITunes forever changed the way people experienced.
View notifications in Notification Center
To open Notification Center, click in the upper-right corner of your screen, or swipe left with two fingers from the right edge of your trackpad.
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Customize alerts or turn them off
You can also control other features here, such as whether notifications appear on your lock screen or include a preview. A preview contains a portion of the email, chat, or other content associated with the notification. You can choose to show previews never, always, or only when you unlock your Mac.
To allow or disallow notifications for specific websites, or to prevent websites from asking for permission to send notifications, learn how to customize website notifications in Safari.
Use Do Not Disturb
Do Not Disturb silences incoming calls and notifications. It automatically turns on when your Mac is connected to a TV or projector.
To choose when Do Not Disturb turns on and off, choose Apple menu > System Preferences, then click Notifications. Do Not Disturb settings are at the top of the sidebar:
Learn More
For more information about Notifications, click in Notifications preferences.
APNs Overview
Apple Push Notification service (APNs) is the centerpiece of the remote notifications feature. It is a robust, secure, and highly efficient service for app developers to propagate information to iOS (and, indirectly, watchOS), tvOS, and macOS devices.
On initial launch of your app on a user’s device, the system automatically establishes an accredited, encrypted, and persistent IP connection between your app and APNs. This connection allows your app to perform setup to enable it to receive notifications, as explained in Configuring Remote Notification Support.
The other half of the connection for sending notifications—the persistent, secure channel between a provider server and APNs—requires configuration in your online developer account and the use of Apple-supplied cryptographic certificates. A provider is a server, that you deploy and manage, that you configure to work with APNs. Figure 6-1 shows the path of delivery for a remote notification.
With push notification setup complete on your providers and in your app, your providers can then send notification requests to APNs. APNs conveys corresponding notification payloads to each targeted device. On receipt of a notification, the system delivers the payload to the appropriate app on the device, and manages interactions with the user.
If a notification for your app arrives with the device powered on but with the app not running, the system can still display the notification. If the device is powered off when APNs sends a notification, APNs holds on to the notification and tries again later (for details, see Quality of Service, Store-and-Forward, and Coalesced Notifications).
Provider Responsibilities
Your provider servers have the following responsibilities for participating with APNs:
For each remote notification request a provider sends, it must: How to download wildlands beta.
Using Multiple Providers
Figure 6-2 depicts the sort of virtual network that APNs enables for the devices running your apps. To handle the notification load, you would typically deploy multiple providers, each one with its own persistent and secure connection to APNs. Each provider can then send notification requests targeting any device for which the provider has a valid device token.
Quality of Service, Store-and-Forward, and Coalesced Notifications
Apple Push Notification service includes a Quality of Service (QoS) component that performs a store-and-forward function. If APNs attempts to deliver a notification and the destination device is offline, APNs stores the notification for a limited period of time and delivers it when the device becomes available again. This component stores only the most recent notification per device and per app. If a device is offline, sending a notification request targeting that device causes the previous request to be discarded. If a device remains offline for a long time, all its stored notifications in APNs are discarded.
To allow the coalescing of similar notifications, you can include a collapse identifier within a notification request. Normally, when a device is online, each notification request that you send to APNs results in a notification delivered to the device. However, when the
apns-collapse-id key is present in your HTTP/2 request header, APNs coalesces requests whose value for that key is the same. For example, a news service that sends the same headline twice could use the same collapse identifier value for both requests. APNs would then coalesce the two requests into a single notification for delivery to the device. For details on the apns-collapse-id key, see Table 8-2.
Security Architecture
APNs enforces end-to-end, cryptographic validation and authentication using two levels of trust: connection trust and device token trust.
Connection trust works between providers and APNs, and between APNs and devices. Playing spotify with excellent download quality.
For a provider to communicate with APNs, it must employ a valid authentication key certificate (for token-based connection trust) or SSL certificate (for certificate-based connection trust). You obtain either of these certificates from your online developer account, as explained in “Configure push notifications” in Xcode Help. To choose between the two certificate types, read Provider-to-APNs Connection Trust. Whichever certificate type you choose, provider connection trust is prerequisite to a provider sending push notification requests to APNs.
Device token trust Windows 10 pro iso 64 bit with crack full version. works end-to-end for each remote notification. It ensures that notifications are routed only between the correct start (provider) and end (device) points.
A device token is an opaque
NSData instance that contains a unique identifier assigned by Apple to a specific app on a specific device. Only APNs can decode and read the contents of a device token. Each app instance receives its unique device token when it registers with APNs, and must then forward the token to its provider, as described in Configuring Remote Notification Support. The provider must include the device token in each push notification request that targets the associated device; APNs uses the device token to ensure the notification is delivered only to the unique app-device combination for which it is intended.
APNs can issue a new device token for a variety of reasons:
As a result, apps must request the device token at launch time, as described in APNs-to-Device Connection Trust and Device Tokens. For code examples, see Registering to Receive Remote Notifications.
Important
To protect user privacy, do not use device tokens to identify user devices.
Provider-to-APNs Connection Trust
There are two schemes available for negotiating connection trust between your provider servers and Apple Push Notification service:
Important
To establish HTTP/2-based TLS sessions with APNs, you must ensure that a GeoTrust Global CA root certificate is installed on each of your providers. If a provider is running macOS, this root certificate is in the keychain by default. On other systems, this certificate might require explicit installation. You can download this certificate from the GeoTrust Root Certificates website. Here is a direct link to the certificate.
If you are instead using the legacy binary interface to APNs, you must ensure that each of your providers has an Entrust Certification Authority (2048) root certificate, available from the Entrust SSL Certificates website.
Token-Based Provider-to-APNs Trust
Token-based provider trust employs a certificate of type “Apple Push Notification Authentication Key (Sandbox & Production).” You configure and obtain this certificate using your online developer account, as explained in “Generate a universal provider token signing key” in Xcode Help. This certificate has the following characteristics:
Figure 6-3 illustrates using the HTTP/2-based APNs provider API to establish trust, and using JWT provider authentication tokens for sending notifications.
As shown in Figure 6-3, token-based provider trust works as follows:
Certificate-Based Provider-to-APNs Trust
A certificate-based provider connection is valid for delivery to one specific app, identified by the topic (the app bundle ID) specified in the provider certificate (which you must have previously created, as explained in “Generate a universal APNs client SSL certificate” in Xcode Help). Depending on how you configure and provision the certificate, the trusted connection can also be valid for delivery of remote notifications to other items associated with your app, including Apple Watch complications for your apps, and for voice-over-Internet Protocol (VoIP) status notifications for your apps. APNs delivers these notifications even when those items are running in the background. See Communicating with APNs for details, and see Voice Over IP (VoIP) Best Practices in Energy Efficiency Guide for iOS Apps.
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With certificate-based trust, APNs maintains a certificate revocation list; if a provider’s certificate is on the revocation list, APNs can revoke provider trust (that is, APNs can refuse the TLS initiation connection).
Figure 6-4 illustrates the use of an Apple-issued SSL certificate to establish trust between a provider and APNs. Unlike Figure 6-3, this figure does not show a notification push itself, but stops at the establishment of a Transport Layer Security (TLS) connection. In the certificate-based trust scheme, push notification requests are not authenticated but they are validated using the accompanying device token.
As shown in Figure 6-4, certificate-based provider-to-APNs trust works as follows:
![]() APNs-to-Device Connection Trust and Device Tokens
Trust between APNs and each device is established automatically, without participation by your app, as described in this section.
Each device has a cryptographic certificate and a private cryptographic key, provided by the operating system at initial device activation and stored in the device’s keychain. During activation, APNs authenticates and validates the connection to the device, based on the certificate and key, as shown in Figure 6-5.
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As shown in Figure 6-5, APNs-to-device trust works as follows:
With a TLS connection established between APNs and the device, apps on the device can register with APNs to receive their app-specific device tokens for remote notifications. For details and code examples, see Registering to Receive Remote Notifications in Configuring Remote Notification Support.
After receiving the device token, an app must connect to the app’s associated provider and forward the token to it. This step is necessary because a provider must include the device token later when it sends a notification request, to APNs, targeting the device. The code you write for forwarding the token is also shown in Registering to Receive Remote Notifications.
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Whether a user is activating a device for the first time, or whether APNs has issued a new device token, the process is similar and is shown in Figure 6-6.
Mac Tv App Notifications
Obtaining and handling an app-specific device token works as follows:
Important
APNs device tokens are of variable length. Do not hard-code their size.
When your provider sends a push notification request to APNs, it includes a device token that identifies a unique app-device combination. This step is shown in the “Token, Payload” arrow between the provider and APNs in Figure 6-7. APNs decrypts the token to ensure the validity of the request and to determine the target device. If APNs determines that the sender and recipient are legitimate, it then sends the notification to the identified device.
After the device receives the notification (and after the final step shown in Figure 6-7), the system forwards the remote notification to your app.
Provisioning Procedures
APNs is available to apps distributed through the iOS App Store, tvOS App Store, and Mac App Store, as well as to enterprise apps. Your app must be provisioned and code signed to use APNs. If you are developing as part of a team, most of these configuration steps can be performed only by a team agent or administrator.
For information on how to configure push notification support in Xcode and in your online developer account, read “Configure push notifications” in Xcode Help.
Copyright © 2018 Apple Inc. All rights reserved. Terms of Use | Privacy Policy | Updated: 2018-06-04
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