不幸的是，基于这篇文章以及此最新的iOS版本(13.3)仍不支持渐进式Web应用程序的某些功能:

Unfortunately, based this post and also this the latest iOS version(13.3) still doesn't support some features of progressive web app:

• 网络推送通知
• 背景同步
• 页面生命周期
• WebViews上的服务人员
• 通用链接/链接捕获

直到现在，还没有消息说将在下一个版本14上实现.正如我在旧帖子中所说，我认为iOS不想在PWA中支持这些功能，因为这些功能有更大的机会被不必要地利用.(垃圾邮件等).而且，也许他们想强迫开发人员创建本机应用程序，而不是渐进式Web应用程序.

Until now, no news that says will be implemented on the next version 14. As I said in the old post, I think iOS doesn't want to support these in PWA because these features have a bigger chance to be unnecessary exploited(spam, etc). And also maybe they want to force developers to create the native application rather than the progressive web application.