sonjh1217

class ChromecastExpandedViewController: UIViewController {
    private var dismissInteractiveTransition = InteracitveTransition()

    override func viewDidLoad() {
          super.viewDidLoad()

          addPanGestureRecognizer()
    }
}

sonjh1217

extension ChromecastExpandedViewController: UIViewControllerTransitioningDelegate {
    public func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return VerticalStackDismissAnimatedTransitioning()
    }
}

sonjh1217

class InteracitveTransition: UIPercentDrivenInteractiveTransition {
    var hasStarted = false
    var shouldFinish = false
}

sonjh1217

class IAPManager {
   func receipt() -> NSData? {
        if let receiptURL = Bundle.main.appStoreReceiptURL,
           FileManager.default.fileExists(atPath: receiptURL.path) {
            return NSData(contentsOf: receiptURL)
        }
        return nil
    }
}

sonjh1217

SKPaymentQueue.default().restoreCompletedTransactions()