A presentation controller which changes the container view size when the trait collection changes

DetailViewPresentationController.swift

class DetailViewPresentationController: UIPresentationController {
    
    override var frameOfPresentedViewInContainerView: CGRect {
        guard let containerView = containerView else {
            return super.frameOfPresentedViewInContainerView
        }
        
        if traitCollection.verticalSizeClass == .compact {
            return CGRect(x: 72, y: 64, width: containerView.frame.width - 144, height: containerView.frame.height)
        } else {
            return CGRect(x: 0, y: 0, width: containerView.frame.width, height: containerView.frame.height)
        }
    }
    
    override func containerViewWillLayoutSubviews() {
        presentedView?.frame = frameOfPresentedViewInContainerView
    }
    
}