How to do authorization through VK iOS SDK?

Question

iOS

Good day! Please tell me, the situation is as follows:
There is a controller for authorization in the application via VK.
By pressing a button on the controller, the authorization method is called and the transition to the mob takes place. VK app to request permission. However, after pressing the "allow" button and returning to my application, the vkSdkShouldPresent method is called and not func vkSdkAccessAuthorizationFinished, which I need to get a token and further work with the VK API
. And I would also like to know how to solve the error (indicated in the console), as far as I understand somehow connected with the fact that when you go to the mob. application to request permission is my controller removed or something like that?
Thanks in advance!
Button for authorization

Delegate methods

Console

By the way, if you still implement VkShouldPresent, then a safari window pops up which, when you click the "allow" button, does not return me to the application, unlike trying to request permission in the VK app itself.

Answer 1

1) Move sdkInstance to the shared ViewController variables (under VK_APP_ID)
2) Remove the call to the initialize method from buttonLoginVKPressed and it is likely that the call to the authorize method should be rewritten to the variable that you initialize earlier.