读取getDeliveredNotifications(completionHandler:)方法中的推送通知负载详细信息

这是我的推送通知负载。

{
    "userId":"QA-207-222820",
    "title":"Push new Notification",
    "message":"New Notification",
    "deviceId":"70",
    "deviceName":"R70",
    "notificationType":"1"
}

无法读取内部通知对象中的上述有效负载键和值 getDeliveredNotifications ios10中的方法。

下面是通知对象的详细信息 获取交付通知 方法

<UNNotification: 0x1742389a0; date: 2017-12-13 09:34:59 +0000,

 request: <UNNotificationRequest: 0x1742389c0; identifier: 067437A1-E8F3-4805-B6D9-
A57BE48E9554, 

content: <UNNotificationContent: 0x17410ba30; title: (null), 
subtitle: (null), body: New Notification 
, categoryIdentifier: , launchImageName: , peopleIdentifiers: (
), threadIdentifier: , attachments: (
), badge: (null), 

sound: <UNNotificationSound: 0x1740b75e0>, 
hasDefaultAction: YES, defaultActionTitle: (null), shouldAddToNotificationsList: YES,
shouldAlwaysAlertWhileAppIsForeground: NO, shouldLockDevice: NO, shouldPauseMedia: NO, 
isSnoozeable: NO, fromSnooze: NO, darwinNotificationName: (null), darwinSnoozedNotificationName: (null), 

trigger: <UNPushNotificationTrigger: 0x17400e2a0; contentAvailable: YES, mutableContent: NO>>>

推送通知中没有关于我发送的有效负载的信息,除了我的通知消息“New notification”,该消息存在于通知对象的body key中,是否有任何方法可以读取通知对象中的所有有效负载键。任何帮助都将不胜感激。