I am trying to develop something on the lines of the Uber app. I have to keep the 2 view controllers in separate storyboards. I need to pull up a drawer like in Uber over a View controller which has a scnview. In simpler term and taking Uber as an example, I need a way to accomplish the same interaction where the mapViewController is in one storyboard and the drawer having the driver details to be in another storyboard.
You can implement this feature in many other ways as well,
But answer to your question is - Yes you can display more than one controller at the same time on screen.
You can use ContainerView
like this :
And using Storyboard reference, you can contain UIViewController of another storyboard's controller.