SKPayment.quantity member not accessible

[cleofasv]

Platform

• iOS
• macOS
• tvOS

In app purchase type

• Consumable
• Non-consumable
• Auto-Renewable Subscription
• Non-Renewing Subscription

Environment

• Sandbox
• Production

Version

0.4.0

Related issues

None

Report

Issue summary

The framework does not provide a way to access the SKPayment.quantity member during purchase. A workaround is to do multiple single purchase transactions to match the quantity, but this would generate multiple receipts.

What did you expect to happen

Enable users to access SKPayment.quantity to support multiple purchases in one purchase transaction to receive just one transaction receipt.

What happened instead

Could not find a way to access the SKPayment.quantity.

[bizz84]

I plan to implement this soon. The new API will likely look like this:

SwiftyStoreKit.purchaseProduct(productId, atomically: atomically, quantity: quantity)

I will also look into exposing the quantity parameter of SKProduct in the Product object returned by the purchase method.

[cleofasv]

Thanks so much @bizz84! I'll keep posted on future releases of SwiftyStoreKit. Also, if ever you need a hand on implementation, I'm very willing to contribute.

[bizz84]

@cleofasv I have added the quantity option when making purchases. This is also returned as part of Payment when the callback is called.

You can test this on the latest develop branch.

As for contributing, as soon as I can get some issues ready with some implementation specs it would be great to get you on board!

[cleofasv]

Thank you so much, @bizz84! I won't be able to test this just yet. Our code base is still Swift2.3, and migration to Swift3 is set to start on June/July. For now, I will be using the workaround.

Edit: @bizz84 , is it possible to port this support for Swift2.3? After further analysis, we found that it is inconvenient for the users to tap on the Purchase confirmation dialog multiple times if we use the workaround(multiple single transaction.) I understand that support for 2.3 has already stopped, but we're hoping that you'd reconsider.

[bizz84]

@cleofasv While I don't have bandwidth to support Swift 2.3, implementing this on your own fork is fairly straightforward:

• Locate the startPayment() method in InAppProductPurchaseRequest, and add the following line:

let payment = SKMutablePayment(product: product)
payment.applicationUsername = applicationUsername
payment.quantity = quantity // new code

• Add a quantity parameter to InAppProductPurchaseRequest.startPayment()
• Add a quantity parameter to SwiftyStoreKit.purchase(), and pass that to InAppProductPurchaseRequest.startPayment()

This should be all you need for the purchase path. Any compiler errors can be fixed by passing thequantity parameter to various places if missing.

If you also want to see the quantity in your callback, you could just modify PurchaseResult and pass along the quantity from your SKProductTransaction as needed:

public enum PurchaseResult {
        case Success(productId: String, quantity: Int)
        case Error(error: PurchaseError)
}

[bizz84]

Closing this issue as this is now available on pod version 0.9.0

[cleofasv]

Oh alright @bizz84, we'll just fork 2.3 and do our modifications there. Thank you so much for the support!