好吧，我在Swift工作，我只是需要帮助。我已经遵循了4个不同的教程，关于如何使用Swift在sprite kit中实现应用购买，逐字复制代码，没有什么对我有用。
以下是我采取的步骤：
1.在iTunes Connect中消失，并在我的应用程序记录下创建了一个应用程序购买。我的应用内购买的产品ID为"GameOverSaveSavior"
1.在Xcode中，我已经将我的应用程序的应用程序内购买功能设置为ON，确保我的团队设置为我的帐户，并确保info下的Bundle Identifier设置为iTunes Connect中我的应用程序的捆绑包标识符
1.在编写任何代码之前，我的GameScene.swift文件中有import StoreKit
至于代码，这是我所做的：
(1)在Gamescene.swift中，在我的didMoveToView函数的末尾，我有：

// Set IAPS
        if(SKPaymentQueue.canMakePayments()) {
            println("IAP is enabled, loading")
            var productID:NSSet = NSSet(objects: "GameOverSaveSavior")
            var request: SKProductsRequest = SKProductsRequest(productIdentifiers: productID as Set<NSObject>)
            request.delegate = self
            request.start()
        } else {
            println("please enable IAPS")
        }

当应用程序运行时，输出"IAP is enabled, loading"。
(2)在GameScene.swift中，在类中但在didMoveToView之外，我有其他人在应用程序购买中使用的所有函数和变量：

var list = [SKProduct]()
var p = SKProduct()

    func purchaseMade() {
        println("they bought it!")
    }

    func buyProduct() {
        println("buy" + p.productIdentifier)

        var pay = SKPayment(product: p)
        SKPaymentQueue.defaultQueue().addTransactionObserver(self)
        SKPaymentQueue.defaultQueue().addPayment(pay as SKPayment)
    }
    func productsRequest(request: SKProductsRequest!, didReceiveResponse response: SKProductsResponse!) {
        println("product request")
        var myProduct = response.products

        for product in myProduct {
            println("product added")
            println(product.productIdentifier)
            println(product.localizedTitle)
            println(product.localizedDescription)
            println(product.price)

            list.append(product as! SKProduct)
        }
    }

    func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue!) {
        println("transactions restored")

        var purchasedItemIDS = []
        for transaction in queue.transactions {
            var t: SKPaymentTransaction = transaction as! SKPaymentTransaction

            let prodID = t.payment.productIdentifier as String

            switch prodID {
            case "GameOverSaveSavior":

                purchaseMade()

                //Right here is where you should put the function that you want to execute when your in app purchase is complete
            default:
                println("IAP not setup")
            }

        }

        var alert = UIAlertView(title: "Thank You", message: "Your purchase(s) were restored. You may have to restart the app before banner ads are removed.", delegate: nil, cancelButtonTitle: "OK")
        alert.show()
    }

    func paymentQueue(queue: SKPaymentQueue!, updatedTransactions transactions: [AnyObject]!) {
        println("add paymnet")

        for transaction:AnyObject in transactions {
            var trans = transaction as! SKPaymentTransaction
            println(trans.error)

            switch trans.transactionState {

            case .Purchased, .Restored:
                println("buy, ok unlock iap here")
                println(p.productIdentifier)

                let prodID = p.productIdentifier as String
                switch prodID {
                case "GameOverSaveSavior":

                    //Here you should put the function you want to execute when the purchase is complete
                    var alert = UIAlertView(title: "Thank You", message: "You may have to restart the app before the banner ads are removed.", delegate: nil, cancelButtonTitle: "OK")
                    alert.show()
                default:
                    println("IAP not setup")
                }

                queue.finishTransaction(trans)
                break;
            case .Failed:
                println("buy error")
                queue.finishTransaction(trans)
                break;
            default:
                println("default")
                break;

            }
        }
    }

    func finishTransaction(trans:SKPaymentTransaction)
    {
        println("finish trans")
    }
    func paymentQueue(queue: SKPaymentQueue!, removedTransactions transactions: [AnyObject]!)
    {
        println("remove trans");
    }

这将在运行应用程序时将"product request"输出到控制台。
(3)在GameScene.swift中，在我的touchesBegan函数中，当触摸右键时，我有以下内容：

//In app purchase
            if touchedNode == saveMeBtn {

                println("button touched!")
                for product in list {
                    var prodID = product.productIdentifier
                    if(prodID == "GameOverSaveSavior") {
                        p = product
                        buyProduct()  //This is one of the functions we added earlier
                        break;
                    }
                }

触摸按钮时输出"button touched!"。
我不知道我做错了什么。代码编译时没有错误，但当我的按钮被触摸时什么也没有发生。没有提醒要求用户登录或购买任何东西-什么都没有。我主要关注的是这个问题：在SKScene中购买应用
在写代码之前，我还需要做些什么吗？我的代码中缺少了什么吗？