paymentQueue - transaction fail - ios

Question

I am building an app with In-App Purchases. The app has 6 products for sale (all consumable).
The app is able to recognize the products (from itunes connect) available for purchase using the following code:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//Apple Store
appleStoreProducts = [productID, product5ID, product25ID, product100ID, product500ID, product1000ID]
SKPaymentQueue.default().add(self)
self.getProductInfo()
}
func getProductInfo() {
if SKPaymentQueue.canMakePayments() {
for product in appleStoreProducts {
let request = SKProductsRequest(productIdentifiers: NSSet(objects: product) as! Set<String>)
request.delegate = self
request.start()
}
} else {
// Tell user that In-App Purchase is disabled in settings
print("In-App Purchase is disabled in settings")
}
}
func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
var products = response.products
if (products.count != 0) {
let newProduct = products[0]
switch newProduct.localizedTitle {
case "DOLLAR":
product = newProduct
case "five dollars":
product2 = newProduct
case "twenty five":
product3 = newProduct
case "one hundred dollars":
product4 = newProduct
case "thousand dollars":
product5 = newProduct
default:
print("none of the above")
}
print("titile : \(newProduct.localizedTitle) \n description: \(newProduct.localizedDescription)")
}
else {
print("Product not found")
}
let invalids = response.invalidProductIdentifiers
for product in invalids {
print("Product not found: \(product)")
}
}
Then you can click a button to make the purchase of one of the items, for example:
#IBAction func productOne(_ sender: Any) {
let payment = SKPayment(product: product!)
SKPaymentQueue.default().add(payment)
}
My PROBLEM appears next, when the paymentQueue method is called:
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction in transactions {
switch transaction.transactionState {
case SKPaymentTransactionState.purchased:
// self.pointsBought()
SKPaymentQueue.default().finishTransaction(transaction)
case SKPaymentTransactionState.failed:
SKPaymentQueue.default().finishTransaction(transaction)
print("transaction failed")
default:
print("ESTDO: \(transaction.transactionState)")
break
}
}
}
This method is called twice when I click once the button. The first time the transactionState is neither "purchased" or "failed", so it calls the default option. The second time the result is "failed". However, I don't know what am I doing wrong.
Relevant information:
I am using an iOS device (iphone 6) to run the app
I am using the developer account (of the app) in my iphone

Answer 1

You are failing to cover every case. You need to cover all of them, and you need to call finishTransaction for certain cases. This is the format of a correct updatedTransactions method:
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for t in transactions {
switch t.transactionState {
case .purchasing, .deferred: break // do nothing
case .purchased, .restored:
let p = t.payment
if p.productIdentifier == whatever {
// ... do stuff ...
queue.finishTransaction(t)
}
case .failed:
queue.finishTransaction(t)
}
}
}