应用终止时处理通知(iOS) [英] Handle Notifications when app is terminated(iOS)

问题描述

我正在开发接收通知的应用程序(使用苹果推送通知).我正在存储这些通知并在一个控制器中显示为列表.据我了解，每当收到通知时都会调用 didReceiveRemoteNotification.当应用程序处于前台和后台时，我可以通过 didReceiveRemoteNotification 方法将通知存储在 Db 中.但是当应用程序终止时，我如何存储通知?

I am working on app which receives notifications(using apple push notifications). I am storing these notifications and showing as list in one controller. As far as I understand whenever notification is received didReceiveRemoteNotification is called. When app is in foreground and background I am able to store notification in Db from didReceiveRemoteNotification method. But when app is terminated how can I store notifications?

如果用户在应用程序终止时点击通知，我可以使用 lauch 选项存储通知.但是如果用户在应用程序终止时没有点击通知，我该如何存储通知?

If user taps on notification when application is terminated I am able to store notification by using lauch options. But if user does not tap the notification when app is terminated how do I store the notification?

推荐答案

您是否尝试过使用 getDeliveredNotifications(completionHandler:)?您可以在例如调用以下代码您在其中显示收到的通知的控制器的 viewDidLoad 方法.

Have you tried using getDeliveredNotifications(completionHandler:)? You can call the following code in e.g. the viewDidLoad method of the controller in which you display the received notifications.

请注意，如果用户在通知中心清除收到的通知，这将不起作用.您必须按照您在评论中链接的问题的已接受答案中所述进行操作.

Note that if the user clears the received notifications in the notification center this won't work. You'll have to do as mentioned in the accepted answer of the question you linked in your comment.

UNUserNotificationCenter.current().getDeliveredNotifications { notifications in

    // notifications: An array of UNNotification objects representing the local
    // and remote notifications of your app that have been delivered and are still
    // visible in Notification Center. If none of your app’s notifications are
    // visible in Notification Center, the array is empty.

    // As said in the documentation, this closure may be executed in a background
    // thread, so if you want to update your UI you'll need to do the following:
    DispatchQueue.main.sync { /* or .async {} */ 
        // update UI
    }
}

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