ios - 使用 SKPayment 未完成交易

Question

我还没有在我的应用程序中完成交易，所以当我尝试使用这个 ID 购买应用程序内时，我收到了这条消息:

this in app purchase has already been bought it will be restored for free

但是当我按下确定按钮时，委托(delegate)方法从未被调用。

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

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

我怎样才能捕捉到一些事件来完成这个交易？

Answer 1

当用户尝试购买某物时，为什么不首先检查该购买是否已在队列中？

BOOL alreadyInProgress = NO;
for (SKPaymentTransaction *tx in [[SKPaymentQueue defaultQueue] transactions])
{
    alreadyInProgress |= [tx.transactionIdentifier isEqualToString:productId];
}
if (alreadyInProgress)
{
    // Alert that the purchase is already active
}
else
{
    // Your purchase flow
}