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IOS UIAlertView IAP Cancel Button

I use StoreKit to implement a purchase in my application. My question is: how can I overlap the UIAlertView when the IAP dialog appears. I need to process the cancel button. I need to know when I click the "Cancel" button and notify the system about it. I need to process the cancel button that will appear in the warning window requesting my user data and password.

For example, if the user clicked the cancel button, he should call the callback method.

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1 answer

You can process it in SKPaymentTransactionObserver

Something like that

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
    for (SKPaymentTransaction *transaction in transactions)
    {
        switch (transaction.transactionState)
        {
            case SKPaymentTransactionStatePurchased:
                break;
            case SKPaymentTransactionStateFailed:
            {
               if (transaction.error.code == SKErrorPaymentCancelled)
               {
                   //user cancelled purchase
                }
             }  
                break;
            case SKPaymentTransactionStateRestored:
                break;
            default:
                break;
        }
    }
}
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