I'm trying to implement that new paymentQueue(_:shouldAddStorePayment:for:) method so my app can handle IAPs directly from the App Store.
I'm using the itms-services:// url to test it, like it says here.
The thing is, my SKPaymentTransactionObserver is a specific view controller, and if it's not visible when I open the itms-services:// link the delegate method won't be called.
What can I do about that? I think I'd have to detect if the user is coming from the App Store to push the right view controller, but I don't know how. The only other option I can think of right now is to make the App Delegate an SKPaymentTransactionObserver, but that seems really cumbersome and I couldn't get it to work when I tried it. Is there any other way?
Here's a class I did that can help you achieve what you want, simply copy the code below and paste it inside a new file and then you can simply access the class StoreManager.shared to whatever method/variable you want to access.
1- To init this class, just call from your didFinishLaunchingWithOptions
StoreManager.shared.Begin() and then payment observer is added.
import Foundation
import StoreKit
class StoreManager: NSObject{
/**
Initialize StoreManager and load subscriptions SKProducts from Store
*/
static let shared = StoreManager()
func Begin() {
print("StoreManager initialized"))
}
override init() {
super.init()
// Add pyament observer to payment qu
SKPaymentQueue.default().add(self)
}
func requestProductWithID(identifers:Set<String>){
if SKPaymentQueue.canMakePayments() {
let request = SKProductsRequest(productIdentifiers:
identifers)
request.delegate = self
request.start()
} else {
print("ERROR: Store Not Available")
}
}
func buyProduct(product: SKProduct) {
print("Buying \(product.productIdentifier)...")
let payment = SKPayment(product: product)
SKPaymentQueue.default().add(payment)
}
func restorePurchases() {
SKPaymentQueue.default().restoreCompletedTransactions()
}
}
// MARK:
// MARK: SKProductsRequestDelegate
//The delegate receives the product information that the request was interested in.
extension StoreManager:SKProductsRequestDelegate{
func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
var products = response.products as [SKProduct]
var buys = [SKProduct]()
if (products.count > 0) {
for i in 0 ..< products.count {
let product = products[i]
print("Product Found: ",product.localizedTitle)
}
} else {
print("No products found")
}
let productsInvalidIds = response.invalidProductIdentifiers
for product in productsInvalidIds {
print("Product not found: \(product)")
}
}
func request(_ request: SKRequest, didFailWithError error: Error) {
print("Something went wrong: \(error.localizedDescription)")
}
}
// MARK:
// MARK: SKTransactions
extension StoreManager: SKPaymentTransactionObserver {
public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction in transactions {
switch (transaction.transactionState) {
case .purchased:
completeTransaction(transaction: transaction)
break
case .failed:
failedTransaction(transaction: transaction)
break
case .restored:
restoreTransaction(transaction: transaction)
break
case .deferred:
// TODO show user that is waiting for approval
break
case .purchasing:
break
}
}
}
private func completeTransaction(transaction: SKPaymentTransaction) {
print("completeTransaction...")
deliverPurchaseForIdentifier(identifier: transaction.payment.productIdentifier)
SKPaymentQueue.default().finishTransaction(transaction)
}
private func restoreTransaction(transaction: SKPaymentTransaction) {
guard let productIdentifier = transaction.original?.payment.productIdentifier else { return }
print("restoreTransaction... \(productIdentifier)")
deliverPurchaseForIdentifier(identifier: productIdentifier)
SKPaymentQueue.default().finishTransaction(transaction)
}
private func failedTransaction(transaction: SKPaymentTransaction) {
if let error = transaction.error as NSError? {
if error.domain == SKErrorDomain {
// handle all possible errors
switch (error.code) {
case SKError.unknown.rawValue:
print("Unknown error")
case SKError.clientInvalid.rawValue:
print("client is not allowed to issue the request")
case SKError.paymentCancelled.rawValue:
print("user cancelled the request")
case SKError.paymentInvalid.rawValue:
print("purchase identifier was invalid")
case SKError.paymentNotAllowed.rawValue:
print("this device is not allowed to make the payment")
default:
break;
}
}
}
SKPaymentQueue.default().finishTransaction(transaction)
}
private func deliverPurchaseForIdentifier(identifier: String?) {
guard let identifier = identifier else { return }
}
}
//In-App Purchases App Store
extension StoreManager{
func paymentQueue(_ queue: SKPaymentQueue, shouldAddStorePayment payment: SKPayment, for product: SKProduct) -> Bool {
return true
//To hold
//return false
//And then to continue
//SKPaymentQueue.default().add(savedPayment)
}
}