是否可以防止显示远程通知? [英] Is it possible to prevent a remote notification from being displayed?

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.

All work should be either about modifying or enhancing this notification. The service extension also doesn't have the power to drop this notification or prevent it from being displayed. This notification will get delivered to the device. If instead you want to launch your application in the background and run some additional processing, you should send a silent notification. You can also send a silent notification and launch your app in the background and your app can determine whether or not to schedule a local notification if you want to present a conditional notification.

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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