ios - 恢复应用内购买错误 : restores even if not purchased

Question

一位(诚实的)用户刚刚告诉我，即使尚未购买应用内购买，只需按“恢复”按钮即可“购买”我的应用程序的应用内购买。这是我正在使用的代码(我认为这已经足够了......但我错了):

 - (IBAction) restore {

            [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
            [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
    }


- (void) paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *) transactions {

    for (SKPaymentTransaction *transaction in transactions) {

        switch(transaction.transactionState){

            case SKPaymentTransactionStatePurchasing:

                NSLog(@"Transaction state -> Purchasing ...");

                break;

            case SKPaymentTransactionStatePurchased:

                NSLog(@"Transaction state -> Purchased");

                [self activatePurchase];

                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                break;

            case SKPaymentTransactionStateRestored:

                NSLog(@"Transaction state -> Restored");

                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];


                break;

            case SKPaymentTransactionStateFailed:

                NSLog(@"Transaction state -> Cancelled");

                if(transaction.error.code == SKErrorPaymentCancelled) {

                    //the user cancelled the payment ;(
                }

                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];

                break;

            case SKPaymentTransactionStateDeferred:

                NSLog(@"Transaction state -> Deferred");

                break;
        }
    }
}




- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue {

    [self activatePurchase];

}

我有什么遗漏的吗？

Answer 1

付款观察者方法 paymentQueueRestoreCompletedTransactionsFinished 会在付款队列完成恢复交易时调用，无论是否实际恢复了任何交易。每次调用 restoreCompletedTransactions 时，您都会收到一次对 paymentQueueRestoreCompletedTransactionsFinished 的调用，即使对 updatedTransactions 的调用次数为 0 次。

因此，即使没有购买，您也会调用 activatePurchase。

激活购买的正确位置是 updateTransactions 中的 SKPaymentTransactionStateRestored 案例；就像您对 SKPaymentTransactionStatePurchased 案例所做的那样。