[Question] ViewModel protocol

[AYastrebov]

So, my idea is to hide ViewModel implementation with protocol

something like this: protocol PostsViewModelType: ViewModelType {}

final class PostsViewModel: PostsViewModelType {}

And then, in viewController, access the viewModel like so: var viewModel: PostsViewModelType

But I am getting the folowing error, when accessing viewModel Protocol 'PostsViewModelType' can only be used as a generic constraint because it has Self or associated type requirements

This happens because of associatedtype, but unfortunately I couldn't figure out how to resolve this. Do you have any thoughts about this?

[sergdort]

I wonder why do you want to hide it with protocol?

The idea is that ViewController receive concrete implementation of view model, where all other dependencies can be injected via ViewModel initializer

[AYastrebov]

Ok, I've got it

[wikwie]

I guess - for the sake of easily testing View Controller with UI / Snapshot tests.