extension YourViewController: CSCardViewPresenter {
    var cardViewPresenterCard: UIView? {
        return cardView // Return the view that represents the start of your transition
    }
}

class YourViewController: UIViewController {
    ...
    // To enable the drag gesture to pop out the card view and go back to the parent view controller.
    lazy var cardTransitionInteractor: CSCardTransitionInteractor = CSCardTransitionInteractor(viewController: self)
    ...
}
extension YourViewController: CSCardPresentedView {
    ... // You will probably add certain methods here later.
}

class YourViewController: UIViewController {
    ...
    // /!\ Set the following var to the style of the status bar in you view controller (here: .default)
    private var currentStatusBarStyle: UIStatusBarStyle = .default
    override var preferredStatusBarStyle: UIStatusBarStyle { currentStatusBarStyle } // Overrides the status bar style
    ...
}
extension YourViewController: CSCardViewPresenter // Do the same for the CSCardPresentedView {
    ...
    /// Called when the status bar style should be updated to match the transition progress
    func cardViewPresenterShouldUpdateBar(to style: UIStatusBarStyle) {
        currentStatusBarStyle = style
        setNeedsStatusBarAppearanceUpdate() // Tell the OS to change the status bar style
    }
}

extension YourViewController: CSCardPresentedView {
    /// A Boolean indicating whether or not the card transition should occur.
    var cardTransitionEnabled: Bool { get }
        
    /// Called when the transition to this view controller just started.
    func cardPresentedViewDidStartPresenting() {}
    /// Called when the transition to this view controller is currently in progress
    /// - Parameter progress: The current progress of the transition (between 0 and 1)
    func cardPresentedViewDidUpdatePresentingTransition(progress: CGFloat) {}
    /// Called when the transition to this view controller is about to end.
    func cardPresentedViewWillEndPresenting() {}
        
    /// Called when the transition back to the parent view controller is about to start.
    func cardPresentedViewWillStartDismissing() {}
    /// Called when the transition back to the parent view controller has started.
    func cardPresentedViewDidStartDismissing() {}
    /// Called when the transition back to the parent view controller is about to be canceled.
    func cardPresentedViewWillCancelDismissing() {}
    /// Called when the transition back to the parent view controller is currently in progress.
    /// - Parameter progress: The current progress of the transition (between 0 and 1)
    func cardPresentedViewDidUpdateDismissingTransition(progress: CGFloat) {}
    /// Called when the transition back to the parent view controller is about to be completed.
    func cardPresentedViewWillEndDismissing() {}
}

extension YourViewController: CSCardViewPresenter {
    /// Called when the transition to the card view controller just started.
    func cardViewPresenterDidStartDismissing() {}
    /// Called when the transition to the card view controller is currently in progress
    /// - Parameter progress: The current progress of the transition (between 0 and 1)
    func cardViewPresenterDidUpdateDismissingTransition(progress: CGFloat) {}
    /// Called when the transition to the card view controller is about to end.
    func cardViewPresenterWillEndDismissing() {}
    
    /// Called when the transition back to this view controller is about to start.
    func cardViewPresenterWillStartPresenting() {}
    /// Called when the transition back to this view controller has started.
    func cardViewPresenterDidStartPresenting() {}
    /// Called when the transition back to this view controller is about to be canceled.
    func cardViewPresenterWillCancelPresenting() {}
    /// Called when the transition back to this view controller is currently in progress.
    /// - Parameter progress: The current progress of the transition (between 0 and 1)
    func cardViewPresenterDidUpdatePresentingTransition(progress: CGFloat) {}
    /// Called when the transition back to this view controller is about to be completed.
    func cardViewPresenterWillEndPresenting() {}
}