About rejected products:
I've got feedback from Apple about the invalidation, resp. rejection of the products:
This is the expected behavior. In-app purchases submitted for review using the app version binary are reviewed as part of the app review process. If the app is rejected, any in-app purchases associated with the app version binary are also rejected. [Translated from German language]
About Error code 301 when purchasing a product during app review:
I made these two changes after multiple rejections due to Error code 301:
1.) I missed to use a distribution provisioning profile, instead i used a developer provisioning profile (... ok my fault .... 🤓)
2.) During the TestFlight tests and the tests with the StoreKit test framework, the following code worked well:
SKMutablePayment *payment = [[SKMutablePayment alloc] init];
payment.productIdentifier = productid;
But as you can read here: Requesting a Payment from the App Store:
When the user selects a product to buy, create a payment request using the corresponding SKProduct object and set the quantity if needed, as shown below. The product object comes from the array of products returned by your app’s products request, as discussed in Fetching Product Information from the App Store.
Therefore I have changed my code accordingly:
SKMutablePayment *payment = [SKMutablePayment paymentWithProduct:_products[productid]];
with _products like this: NSMutableDictionary<NSString *,SKProduct *> *_products; it holds all the SKProduct objects.
** After these two changes, the app and products are now no longer rejected. 😌**
