问sceneDidEnterBackground上的URL请求(iOS13)

EN

func sceneDidEnterBackground(_ scene: UIScene)
{
    DispatchQueue.global().async {
        self.identifier = UIApplication.shared.beginBackgroundTask(withName: "Going to background") {
            UIApplication.shared.endBackgroundTask(self.identifier)
            self.identifier = UIBackgroundTaskIdentifier.invalid
        }
        let baseUrl = Bundle.main.object(forInfoDictionaryKey: "Base URL") as! String
        let url = URL(string: "\(baseUrl)/Client/background")!
        var request = URLRequest(url: url)

        request.httpMethod = "GET"
        let cookie = self.settings.string(forKey: "cookie")
        request.setValue(cookie, forHTTPHeaderField: "cookie")

        let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
            print("got response \(response)")
        }
        task.resume()
    }
}