Swift 3.0:对推送通知中成员'下标'问题的模糊引用

这是以下代码,但我在swift3中收到以下错误

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    notificationReceived(notification: userInfo as [NSObject : AnyObject])
}

func notificationReceived(notification: [NSObject:AnyObject]) {
        let viewController = window?.rootViewController
        let view = viewController as? ViewController
        view?.addNotification(
            title: getAlert(notification: notification).0,
            body: getAlert(notification: notification).1)
    }

    private func getAlert(notification: [NSObject:AnyObject]) -> (String, String) {
        let aps = notification["aps"] as? NSDictionary
        let alert = aps?["alert"] as? [String:AnyObject]
        let title = alert?["title"] as? String
        let body = alert?["body"] as? String
        return (title ?? "-", body ?? "-")
    }

但我得到以下错误" Swift 3.0:对成员'下标'问题的模糊引用 "在" 让aps = notification ["aps"]为"NSDictionary "

键入转换

将userInfo从NSDictionary更改为[String:Any].并尝试一次

let aps = notification["aps"] as? [String : Any]

或者写得像

let aps = notification["aps" as NSString] as? [String:Any]