In app purchase at SKScene

Question

Is it possible to implement an in-app purchase in SKScene ? If so, how? I am trying to use SKSpriteNode as a buy button with no luck. I am not sure if the code is needed in SKScene or the view controller. I looked through a lot of tutorials, but they all seem to target single view applications, not SpriteKit.

Answer 1

First, put this in the line of your game scene and make sure you import the "StoreKit" infrastructure

 class GameScene: SKScene, SKPaymentTransactionObserver, SKProductsRequestDelegate { 

Then you want to put these lines in your didmovetoview. Keep in mind that after the "objects:" The line that you put should be the purchase ID of the application that you configured using the iTunes connection.

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

Outside of any other functions, but still in the game scene, insert these functions and variables

 //In App Purchases var list = [SKProduct]() var p = SKProduct() 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 "IAP id here": //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 "IAP id here": //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"); } 

Then you should call node you need to do iAP

 whateverYourNodeIs.name = "inAppPurchaseNode" 

Finally do it in touchsBegan

  let touch = touches.first as? UITouch let positionInScene = touch!.locationInNode(self) let touchedNode = self.nodeAtPoint(positionInScene) if let name = touchedNode.name { if name == "inAppPurchaseNode" { for product in list { var prodID = product.productIdentifier if(prodID == "iAp id here") { p = product buyProduct() //This is one of the functions we added earlier break; } } } } 

You will also want this in your touch to start restoring purchases with another node.

  if let name = touchedNode.name { if name == "restore" { SKPaymentQueue.defaultQueue().restoreCompletedTransactions() SKPaymentQueue.defaultQueue().addTransactionObserver(self) } }