As documentation mentioned that a RIB can be viewable or viewless, it is found that viewable RIB must be associated with UIViewController. However, I think it is not possible and most viewable RIB should be UIView-based as RIBs framework encouraging us to make reusable and micro components.

As the below image shown, are those viewable RIBs (Confirmation, Location Refinements, Menu) UIViewCont

For example we have ImageGalleryStory as a name of our module.

Then

ImageGalleryStoryViewController.swift

class ImageGalleryStoryViewController : UIViewController, ImageGalleryStoryViewInput

var output: ImageGalleryStoryViewOutput!

must be

@objc var output: ImageGalleryStoryViewOutput!

and

protocol ImageGalleryStoryViewOutput

must be

`@objc protocol ImageGalleryStoryViewOu