如何在应用程序处于后台/终止状态时忽略远程/推送通知

Question

使用的技术：

• Firebase 云消息传递
• 斯威夫特 3.2
• Xcode 9.2

为了给您一个背景，这是我通过 FCM 在 api 服务器上发送的数据

{
    "priority": "high",
    "content_available": true,
    "alert": true,
    "sound": true,
    "registration_ids": [
         "<SOME_ID_HERE>", 
         "<SOME_ID_HERE>"
    ],
    "notification": {
        "title": "SOME TITLE",
        "body": "SOME BODY"
    },
    "data": {
        "some_key": "some_value",
        "some_key2": "some_value2"
    }
}

应用程序正确接收了这些方法，并且我以正确的方式正确使用这些方法

application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void)
messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage)
messaging(_ messaging: Messaging, didRefreshRegistrationToken fcmToken: String)
userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void)
userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)

有没有办法在应用处于后台/使用此示例代码终止时以某种方式忽略推送通知？

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    switch application.applicationState {
    case .inactive, .background:
        // Tell Firebase that we recieved the Push Notification
        self.messaging.appDidReceiveMessage(userInfo)
        // `PushNotification` is a model that parses the `userInfo` dictionary
        guard let pushNotification: PushNotification = PushNotification(userInfo) else {
            return // end code execution cause push cannot be parsed
        }
        if pushNotification.isSomeKindOfThing {
            // ignore
        } else {
            // do nothing so it will show
        }
    case .active:
        // handle when application is active
    }
}

我

的目标是，当我收到推送通知时，我可以根据"data"键中的内容忽略它。

Answer 1

如果从推送通知日期的正文中删除键"content_available"：true。然后，当应用程序处于后台或终止时，将不会收到推送通知。