//This method will parse push notification userinfo data
    func parseNotification(userInfo: [AnyHashable: Any]) {
        print(">>>parseNotificationCalled ")
        if let notification = userInfo["payload"] as? String,
            let jsonData = notification.data(using: .utf8),
            let dict = try? JSONSerialization.jsonObject(with: jsonData, options: .allowFragments) as? NSDictionary {
            //This is the point where we need to save push notification
            savePushNotification(payloadDict: dict ?? [:])
            print("APS PAYLOAD DICTIONARY \(dict)")
        }

就我而言，有效载荷字典采用字符串格式.解决了.​​

As in my case payload dictionary coming in string format. Solved.