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swiftstorekit

Cannot assign value of type 'Product.SubscriptionInfo.Status??' to type 'Product.SubscriptionInfo.Status?'

I'm trying to implement StoreKit in my project, specifically, the auto-renewable subscriptions, using Apple's implementing StoreSit2 example.

I refactored Apple's project to only include a yearly subscription based on what I need for my app. I uploaded the refactored project on Github. I did everything exactly as the project is setup, however, I get this error in the files: Store and StatusInfoView at the following line: In "Store" line 214:

subscriptionGroupStatus = try? await subscriptions.first?.subscription?.status.first?.state

Error:

Cannot assign value of type 'Product.SubscriptionInfo.RenewalState??' to type 'RenewalState?' (aka 'Optional<Product.SubscriptionInfo.RenewalState>')

In "StatusInfoView" line 134:

 subscriptionStatus = try? await product.subscription?.status.last

Error:

Cannot assign value of type 'Product.SubscriptionInfo.Status??' to type 'Product.SubscriptionInfo.Status?'

  The project on Github Does not produce error It shows after I copy paste the files to my Xcode project.

I can't figure out how to fix value assignment.

Any help would be greatly appreciated

  @MainActor
    func updateCustomerProductStatus() async {
        var purchasedSubscriptions: [Product] = []

        //Iterate through all of the user's purchased products.
        for await result in Transaction.currentEntitlements {
            do {
                //Check whether the transaction is verified. If it isn’t, catch `failedVerification` error.
                let transaction = try checkVerified(result)

                //Check the `productType` of the transaction and get the corresponding product from the store.
                switch transaction.productType {

                case .autoRenewable:
                    if let subscription = subscriptions.first(where: { $0.id == transaction.productID }) {
                        purchasedSubscriptions.append(subscription)
                    }
                default:
                    break
                }
            } catch {
                print()
            }
        }



        //Update the store information with auto-renewable subscription products.
        self.purchasedSubscriptions = purchasedSubscriptions

        //Check the `subscriptionGroupStatus` to learn the auto-renewable subscription state to determine whether the customer
        //is new (never subscribed), active, or inactive (expired subscription). This app has only one subscription
        //group, so products in the subscriptions array all belong to the same group. The statuses that
        //`product.subscription.status` returns apply to the entire subscription group.
        //let storeProducts = try await Product.products(for: productIdToEmoji.keys)

        subscriptionGroupStatus = try? await subscriptions.first?.subscription?.status.first?.state
    }


struct StatusInfoView_Previews: PreviewProvider {
    @StateObject static var store = Store()
    @State static var subscription: Product?
    @State static var subscriptionStatus: Product.SubscriptionInfo.Status?
    
    static var previews: some View {
        Group {
            if let subscription, let subscriptionStatus {
                StatusInfoView(product: subscription, status: subscriptionStatus)
                    .environmentObject(store)
            }
        }
        .task {
            guard let product = store.purchasedSubscriptions.first else {
                return
            }
            subscription = product
            subscriptionStatus = try? await product.subscription?.status.last
        }
    }
Solution

  • I figured it out. The project from Apple was written in Swift 5. When I refactored the code and moved it to my project, which was written in Swift 4, it threw that syntax error at. I updated my project to Swift 5 and the error was gone. enter image description here