.swift

 // Prepare your view controller for the interaction to handle.
    func configureView(for parameters: Set<INParameter>, of interaction: INInteraction, interactiveBehavior: INUIInteractiveBehavior, context: INUIHostedViewContext, completion: @escaping (Bool, Set<INParameter>, CGSize) -> Void) {
        
        guard let intent = interaction.intent as? OrderCoffeeIntent else {
            completion(false, Set(), .zero)
            return
        }
        
        // clear out all the views
        for childView in view.subviews {
            childView.removeFromSuperview()
        }
        
        var desiredSize = CGSize.zero
        
        if interaction.intentHandlingStatus == .ready {
            desiredSize = displayInvoice(name :intent.coffeeName!, deliveryLocation :intent.deliveryLocation!)
        } else if interaction.intentHandlingStatus == .success {
            desiredSize = displayConfirm(name :intent.coffeeName!)
        }
        
        // Do configuration here, including preparing views and calculating a desired size for presentation.
        completion(true, parameters, desiredSize)
    }