根据苹果在 2021 年 4 月 1 日之前发出的新通知，所有应用程序都需要使用基于 HTTP/2 的 API，因为我们使用 FCM 进行云消息传递，因此需要确认 Firebase 服务将来也能正常工作，
The HTTP/2-based Apple Push Notification service (APNs) provider API lets you take advantage of great features, such as authentication with a JSON Web Token, improved error messaging, and per-notification feedback. If you send push notifications with the legacy binary protocol, we strongly recommend upgrading to the APNs provider API.
To give you additional time to prepare, the deadline to upgrade to the APNs provider API has been extended to March 31, 2021. APNs will no longer support the legacy binary protocol after this date. https://developer.apple.com/news/?id=c88acm2b
最佳答案
刚刚收到来自 Firebase 支持的消息，我们不需要采取任何行动。
The details about Updated APNs provider API deadline will not have any performance impact or issues on FCM, and there’s no action item needed on your end in relation to Apple Push Notification service server certificate update.
Let me know if you have any clarifications.
关于ios - Google FCM 是否支持基于 HTTP 2 的 Apple APNs API？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/66256804/