问题描述
我想更好地控制向我的用户显示哪些通知，并有选择地将其中一些通知静音.为了做到这一点，我在我的应用程序中实现了一个 UNNotificationServiceExtension应用程序，即使我的应用程序未运行，它也允许我拦截和修改通知.然而，问题是即使我不调用 didReceive(_:withContentHandler:) 系统仍然会在大约 30 秒后显示远程通知.我怎样才能防止这种情况发生?
I'd like to better control what notifications are being displayed to my users and selectively silence some of them. In order to do this I have implemented a UNNotificationServiceExtensionin my app, which allows me to intercept and modify notifications even when my app is not running. The problem however is that even if I don't call didReceive(_:withContentHandler:) the system will still display the remote notification after approximately 30 seconds. How can I prevent this from happening?
推荐答案
自 iOS 11 起，无法使用 UNNotificationServiceExtension 抑制显示推送通知.
As of iOS 11, it is not possible to suppress push notifications from being displayed using a UNNotificationServiceExtension.
在 WWDC 17 的 Best Practices以及用户通知中的新增功能，Teja 明确表示无法执行此类操作(从 22:17 分钟开始):
In WWDC 17's Best Practices and What’s New in User Notifications, Teja states explicitly that such a thing cannot be done (starting at 22:17 min):
所有工作都应该与修改或增强此通知有关.服务扩展也无权删除此通知或阻止其显示.此通知将发送到设备.相反，如果您想在后台启动您的应用程序并运行一些额外的处理，您应该发送一个静默通知.您还可以发送静默通知并在后台启动您的应用，如果您想显示条件通知，您的应用可以决定是否安排本地通知.
来自 iOS 13.3 通知服务权利 com.apple.developer.usernotifications.filtering 允许过滤通知(如 Aviharsh Shukla 的评论中指出的那样).
From iOS 13.3 the notification service entitlement com.apple.developer.usernotifications.filtering allows for filtering notifications (as pointed out in Aviharsh Shukla's comment).
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