SwiftyDropbox "unlinkClients" not present in package, can't clear session

I should note that the session still persists even when I uninstall and re-install the app.

Also the docs say you should call DropboxClient.unlinkClients but I can't find that on the package code, only

        DropboxClientsManager.unlinkClients() 

works

Hi, thanks for the fast reply. I didn't see any errors when I used an iPad (model A1403) , but I tried an iPod (A1421) the login flow works just fine, it goes straight to the login form. Other users have reported this error on a similar iPad and iPad pro. We're all on iOS version 9.3.5. 

Thanks, since this is only occurring on some devices, there may be something device-specific, or specific to certain instances or versions of your app.

Is there anything unusual about how your app is set up with respect to the Keychain? It sounds like perhaps the SDK isn't able to clear the access tokens from the keychain as intended when calling unlinkClients. (That's what I was looking for when asking for error messages.)

If you can share the relevant code snippets, or ideally a sample project that demonstrates the issue, that would be helpful.

Alternatively, can you try running this earlier than applicationWillTerminate? From the documentation there:

"Your implementation of this method has approximately five seconds to perform any tasks and return. If the method does not return before time expires, the system may kill the process altogether."

If that takes a long time to run for some reason, it may not complete in time.

Hi,

these are code snippets in AppDelegate.swift containing Dropbox login/logout functionality 

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        UIApplication.shared.isStatusBarHidden = true
        // Setup Drobox app Key
        DropboxClientsManager.setupWithAppKey(dropboxKey)
        return true
    }


    func applicationDidFinishLaunching(_ application: UIApplication) {
       
        if DropboxClientsManager.authorizedClient != nil {
            storyBoard = UIStoryboard(name: Constants.controllerName.mainController, bundle: nil)
            tabBarViewController = storyBoard.instantiateViewController(withIdentifier: Constants.controllerName.tabBar) as! UITabBarController
            tabBarViewController.delegate = self
            window?.rootViewController = tabBarViewController
            switchController(tabBarViewController)
        } else {
            switchController(loginViewController)

        }
    }

    func applicationWillTerminate(_ application: UIApplication) {
        DropboxClientsManager.unlinkClients()
        self.sessionCleanup(entity: "EntityName") 
    }

    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        // Manage Dropbox redirect to Login
        if let authResult = DropboxClientsManager.handleRedirectURL(url) {
            switch authResult {
            case .success:
                print("Info: Success! User is logged into Dropbox.")
                UserDefaults.standard.set(true, forKey: "HasLaunchedOnce")
                UserDefaults.standard.synchronize()
            case .cancel:
                print("Cance: Authorization flow was manually canceled by user!")
            case .error(_, let description):
                print("Error: \(description)")
            }
        }
        return true
    }

I was able to delete everything in the keychain and that worked as well. Right now I'm looking into the github repo for Swifty dropbox and checking if I can just delete the dropbox token explicitly since I really would like to preserve the functionality of logout on app close.

Thanks for the information! Can you elaborate on what exactly you did to clear the Keychain to get that working though? (This is supposed to be done automatically for you.)

You can see where this is done in the SDK in the following stack of DropboxClientsManager.unlinkClients -> DropboxOAuthManager.clearStoredAccessTokens - > Keychain.clear:

• https://github.com/dropbox/SwiftyDropbox/blob/345f460558cd1b1c4faf8c6c5fff80f5809044d1/Source/SwiftyDropbox/Shared/Handwritten/DropboxClientsManager.swift#L149
• https://github.com/dropbox/SwiftyDropbox/blob/345f460558cd1b1c4faf8c6c5fff80f5809044d1/Source/SwiftyDropbox/Shared/Handwritten/OAuth.swift#L260
• https://github.com/dropbox/SwiftyDropbox/blob/345f460558cd1b1c4faf8c6c5fff80f5809044d1/Source/SwiftyDropbox/Shared/Handwritten/OAuth.swift#L442

Also, did you get a chance to review the questions in my last reply? E.g., did you try moving the call to see if it's a timing issue?