Swift3 如何设置会话&；cookie并将其储存起来，与Alamofire、Swift 3一起使用

请有人给我一些指导，我在这方面是全新的。我正在制作一个具有登录选项的应用程序。一旦我登录，我想保存会话，这样我就不必反复登录，直到我注销并销毁会话。我正在为这个应用程序使用Alamofire和SwiftyJSON。这是我在按下“登录”按钮时的代码

    @IBAction func loginBtnPressed(_ sender: AnyObject) {

    let userID = self.userName.text! as String
    let password = self.passwordText.text! as String

    if userID.isEmpty || password.isEmpty {
        showMessage(myMessage: "username & password required")
        return
    }

    let postsEndpoint: String = "http://xxx/api/login/"
    let newPost = ["username": userID, "password": password] as [String : Any]

    Alamofire.request(postsEndpoint, method: .post, parameters: newPost, encoding: URLEncoding.httpBody)
        .responseJSON { response in
            guard response.result.error == nil else {
                // got an error in getting the data, need to handle it
                print("error calling GET on /posts/1")
                print(response.result.error!)
                return
            }
            if let value: AnyObject = response.result.value as AnyObject? {
                // handle the results as JSON, without a bunch of nested if loops
                let post = JSON(value)
                print("The User is: " + post.description)

                let username = post["display_name"].string
                if  ( username != nil ) {
                   // to access a field:
                   // print("The title is: " + username!)

                    let sb: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
                    let controllerLogin : UIViewController = sb.instantiateViewController(withIdentifier: "logInSB")
                    self.present(controllerLogin, animated: true, completion: nil)

                    } else {
                      self.showMessage(myMessage: "wrong username & password")
                }
            }
    }
}

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我知道什么是会话和cookies，如果有好心人告诉我如何使用Alamofire&Swift实现它，这将是我的救命稻草。我正在网上搜索，但找不到合适的答案。先谢谢你

我自己解决了。在我的loginBtnPressed功能中，我设置了一些键，如下所示

UserDefaults.standard.set(post["user_id"].int, forKey: "user_id")
UserDefaults.standard.set(post["user_email"].stringValue, forKey: "user_email")
UserDefaults.standard.set(post["display_name"].stringValue, forKey: "display_name")
UserDefaults.standard.synchronize()

最后，在AppDelegate中，我检查并如下调用它

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.

    UIApplication.shared.statusBarStyle = .lightContent

    let getUserID = UserDefaults.standard.string(forKey: "user_id")

    if getUserID != nil {

        let sb: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let controllerLogin : UIViewController = sb.instantiateViewController(withIdentifier: "SWRevealViewController") as! SWRevealViewController
        self.window?.rootViewController = controllerLogin
    }

    return true
}