Swift 3: Saving login information

Question

I'm working on a simple webview app in Xcode 8.2.1.

Yes, I know. There's a newer version available, but the Mac I have assigned won't update to High Sierra. I'm stuck with El Capitan. So, I've followed some simple tutorials and I've come to develop a simple app that will load my website. The app itself works, but there's a slight big issue: when the users close the app, the cookies will destroy themselves and the user will have to login again. I don't want to make them login again if they accidentally close the app or something like that. How can I do this? I read here that I could use

@UIApplicationMain 
class AppDelegate: UIResponder, UIApplicationDelegate 
    {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    HTTPCookieStorage.shared.cookieAcceptPolicy = HTTPCookie.AcceptPolicy.always
        return true
    }

but, unfortunately it won't work and the login information will clear after the app is closed.

This is ViewController.swift

import UIKit

class ViewController: UIViewController, UIWebViewDelegate {


    @IBOutlet weak var myWebView: UIWebView!
    @IBAction func backButton(_ sender: Any)
    {
        if myWebView.canGoBack{
            myWebView.goBack()
        }
    }
    @IBAction func refreshButton(_ sender: Any)
    {
        myWebView.reload()
    }

    @IBAction func forwardButton(_ sender: Any)
    {
        if myWebView.canGoForward{
            myWebView.goForward()
        }
    }

    func webViewDidStartLoad(_ webView: UIWebView) {
        UIApplication.shared.isNetworkActivityIndicatorVisible = true
    }

    func webViewDidFinishLoad(_ webView: UIWebView) {
        UIApplication.shared.isNetworkActivityIndicatorVisible = false
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        myWebView.loadRequest(URLRequest(url: URL(string: "myURL")!))

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }


}

And this is AppDelegate.swift

import UIKit

@UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        HTTPCookieStorage.shared.cookieAcceptPolicy = HTTPCookie.AcceptPolicy.always
        return true
    }

    func applicationWillResignActive(_ application: UIApplication) {

    }

    func applicationDidEnterBackground(_ application: UIApplication) {

    }

    func applicationWillEnterForeground(_ application: UIApplication) {

    }

    func applicationDidBecomeActive(_ application: UIApplication) {

    }

    func applicationWillTerminate(_ application: UIApplication) {

    }

    func saveCookies() {
        guard let cookies = HTTPCookieStorage.shared.cookies else {
            return
        }
        let array = cookies.flatMap { (cookie) -> [HTTPCookiePropertyKey: Any]? in
            cookie.properties
        }
        UserDefaults.standard.set(array, forKey: "cookies")
        UserDefaults.standard.synchronize()
    }

    func loadCookies() {
        guard let cookies = UserDefaults.standard.value(forKey: "cookies") as? [[HTTPCookiePropertyKey: Any]] else {
            return
        }
        cookies.forEach { (cookie) in
            guard let cookie = HTTPCookie.init(properties: cookie) else {
                return
            }
            HTTPCookieStorage.shared.setCookie(cookie)
        }
    }

}

This app won't be published on the appstore and it's intended just for three users in my company. This is why I decided to do a simple thing and not something big-scaled.

Answer 1

I just needed to re-set the cookies.

NSData *cookiesdata = [[NSUserDefaults standardUserDefaults] objectForKey:@"MySavedCookies"];
if([cookiesdata length]) {
    NSArray *cookies = [NSKeyedUnarchiver unarchiveObjectWithData:cookiesdata];
    NSHTTPCookie *cookie;

    for (cookie in cookies) {
        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
    }
}