我在应用程序购买中解锁2级并且它可以工作，但如何在应用程序购买中添加另一个解锁3级？我是否必须创建新功能并添加level3的代码？我不知道该怎么做。谢谢！
func unlockLevel() {
if SKPaymentQueue.canMakePayments() {
var productID:NSSet = NSSet(object: "unlockLevelTwo")
var productsRequest:SKProductsRequest = SKProductsRequest(productIdentifiers: productID as Set<NSObject>)
productsRequest.delegate = self
productsRequest.start()
println("Fetching products...")
}
else {
println("Can't make purchases")
}
}
func buyProduct(product: SKProduct) {
println("Sending the Payment Request to Apple");
var payment = SKPayment(product: product)
SKPaymentQueue.defaultQueue().addPayment(payment);
}
func productsRequest(request: SKProductsRequest!, didReceiveResponse response: SKProductsResponse!) {
var count : Int = response.products.count
if (count>0) {
var validProducts = response.products
var validProduct: SKProduct = response.products[0] as! SKProduct
if (validProduct.productIdentifier == "unlockLevelTwo") {
println(validProduct.localizedTitle)
println(validProduct.localizedDescription)
println(validProduct.price)
buyProduct(validProduct);
}
else {
println(validProduct.productIdentifier)
}
}
else {
println("nothing")
}
}
func request(request: SKRequest!, didFailWithError error: NSError!) {
println("Error fetching product info")
}
func RestorePurchases() {
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
}
func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue!) {
for item in queue.transactions {
if let transaction = item as? SKPaymentTransaction {
if transaction.transactionState == .Restored {
unlockLevel()
SKPaymentQueue.defaultQueue().finishTransaction(transaction)
break
}
}
}
if queue.transactions.count == 0 {
println("not restored")
displayRestoreAlert()
}
}
func displayRestoreAlert() {
let alertController = UIAlertController(title: "Level Two has not been purchased on this account.", message: nil, preferredStyle: .Alert)
let OKAction = UIAlertAction(title: "OK", style: .Default, handler: nil)
alertController.addAction(OKAction)
self.viewController.presentViewController(alertController, animated: true, completion: nil)
}
func paymentQueue(queue: SKPaymentQueue!, updatedTransactions transactions: [AnyObject]!) {
println("Received Payment Transaction Response from Apple");
for transaction:AnyObject in transactions {
if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction{
switch trans.transactionState {
case .Purchased:
println("Product Purchased");
SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
NSUserDefaults().setBool(true, forKey: "Leavel2")
unlockLevelTwo()
break;
case .Failed:
println("Purchased Failed");
SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
break;
case .Restored:
println("Already Purchased");
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
default:
break;
}
}
}
}