iOS - How to delay of showing message "purchase was successful" to wait until the validation receipt finished

Question

i've searched and can't find any way to create a delay of showing message: "Your purchase was successful" to wait until the validation receipt finished.

I've tried to quote the line SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction) but the message still fires.

 func paymentQueue(queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        print("Received Payment Transaction Response from Apple");

        for transaction:AnyObject in transactions {
            if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction{
                switch trans.transactionState {
                case .Purchased:
                    print("Product Purchased");
                    SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)

                    // validate receipt and update money
                    validateReceipt(trans.payment.productIdentifier)

                    break;
                case .Failed:
                    print("Purchased Failed");
                    SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)

                    self.indicator.Hide()
                    break;
                case .Restored:
                    print("restored")
                    SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
                    //[self restoreTransaction:transaction];

                    self.indicator.Hide()
                    break;
                default:
                    break;
                }
            }
        }
    }

Answer 1

Basically there is no way to delay the "purchase was successful" message.

But you can show an additional alert after validating the receipt, showing the results of validation to user.