Why aren't users getting in-app-purchase confirmation in Swift iOS? - ios

Question

I am presenting IAP options in an alert view, and here is the code that I use to do that:
paidAlert.addAction(UIAlertAction(title: "Purchase", style: UIAlertAction.Style.default, handler: { (action) in
IAPHandler.shared.purchaseMyProduct(index: 0)
}))
paidAlert.addAction(UIAlertAction(title: "Restore", style: UIAlertAction.Style.default, handler: { (action) in
IAPHandler.shared.restorePurchase()
}))
paidAlert.addAction(UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: { (action) in
}))
I handle the actual IAP in another Swift file, which is posted here:
import UIKit
import StoreKit
enum IAPHandlerAlertType{
case disabled
case restored
case purchased
func message() -> String{
switch self {
case .disabled:
let notificationFeedbackGenerator = UINotificationFeedbackGenerator()
notificationFeedbackGenerator.prepare()
notificationFeedbackGenerator.notificationOccurred(.error)
return "Purchases are disabled on your device."
case .restored:
let notificationFeedbackGenerator = UINotificationFeedbackGenerator()
notificationFeedbackGenerator.prepare()
notificationFeedbackGenerator.notificationOccurred(.success)
return "Unlimited strategies have been successfully unlocked. You can restore this purchase using this Apple ID on other devices."
case .purchased:
let notificationFeedbackGenerator = UINotificationFeedbackGenerator()
notificationFeedbackGenerator.prepare()
notificationFeedbackGenerator.notificationOccurred(.success)
return "Unlimited strategies have been successfully unlocked. You can restore this purchase using this Apple ID on other devices."
}
}
}
class IAPHandler: NSObject {
static let shared = IAPHandler()
let NON_CONSUMABLE_PURCHASE_PRODUCT_ID = "com.isaranjha.opc.fullversion"
fileprivate var productID = ""
fileprivate var productsRequest = SKProductsRequest()
fileprivate var iapProducts = [SKProduct]()
var purchaseStatusBlock: ((IAPHandlerAlertType) -> Void)?
// MARK: - MAKE PURCHASE OF A PRODUCT
func canMakePurchases() -> Bool { return SKPaymentQueue.canMakePayments() }
func purchaseMyProduct(index: Int){
if iapProducts.count == 0 { return }
if self.canMakePurchases() {
let product = iapProducts[index]
let payment = SKPayment(product: product)
SKPaymentQueue.default().add(self)
SKPaymentQueue.default().add(payment)
print("PRODUCT TO PURCHASE: \(product.productIdentifier)")
productID = product.productIdentifier
} else {
purchaseStatusBlock?(.disabled)
}
}
// MARK: - RESTORE PURCHASE
func restorePurchase(){
SKPaymentQueue.default().add(self)
SKPaymentQueue.default().restoreCompletedTransactions()
}
// MARK: - FETCH AVAILABLE IAP PRODUCTS
func fetchAvailableProducts(){
// Put here your IAP Products ID's
let productIdentifiers = NSSet(objects: NON_CONSUMABLE_PURCHASE_PRODUCT_ID
)
productsRequest = SKProductsRequest(productIdentifiers: productIdentifiers as! Set<String>)
productsRequest.delegate = self
productsRequest.start()
}
}
extension IAPHandler: SKProductsRequestDelegate, SKPaymentTransactionObserver{
// MARK: - REQUEST IAP PRODUCTS
func productsRequest (_ request:SKProductsRequest, didReceive response:SKProductsResponse) {
if (response.products.count > 0) {
iapProducts = response.products
for product in iapProducts{
let numberFormatter = NumberFormatter()
numberFormatter.formatterBehavior = .behavior10_4
numberFormatter.numberStyle = .currency
numberFormatter.locale = product.priceLocale
let price1Str = numberFormatter.string(from: product.price)
print(product.localizedDescription + "\nfor just \(price1Str!)")
}
}
}
func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue) {
purchaseStatusBlock?(.restored)
}
// MARK:- IAP PAYMENT QUEUE
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction:AnyObject in transactions {
if let trans = transaction as? SKPaymentTransaction {
switch trans.transactionState {
case .purchased:
print("purchased")
SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction)
purchaseStatusBlock?(.purchased)
break
case .failed:
print("failed")
SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction)
break
case .restored:
print("restored")
SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction)
break
default: break
}}}
}
}
However, multiple users (but not all users) have reported that they are able to purchase the IAP fine (it charges them and everything), but they do not get any confirmation that I have coded in (alert saying that the purchase was successful etc.) and therefore none of the purchased features. The only workaround we've been able to find is that the user needs to kill the app from multitasking, get to the initial IAP purchase alert again, but select Restore, and then it prompts accordingly and the features are unlocked.
I can't figure out where I am going wrong with this, but seeing as how Restore functionality seems to work, I'm assuming I'm missing something for actual purchasing that will call the case .purchased properly and display the alert.
Any help is appreciated.