swift - 迅速：completionHandler（UIBackgroundFetchResult.newData）不起作用

Question

我收到推送通知，但不显示通知：

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    print("Message ID2: \(userInfo)")
    completionHandler(UIBackgroundFetchResult.newData)
}

打印消息 ID2 没关系：

消息 ID2：[AnyHashable("google.cae"): 1, AnyHashable("TEXT"): NEXT, AnyHashable("gcm.notification.POSITION"): 票证, AnyHashable("POSITION"): 票证, AnyHashable("TITLE "): TEST, AnyHashable("gcm.message_id"): 0:1534328572978948%f6f48aeff6f48aef, AnyHashable("aps"): { alert = { body = NEXT; 标题=测试；}; 声音=默认；}]

也setting > app接受所有许可