当交易不存在时，无法恢复交易 应用内购买和目标 c

Question

我有一个应用程序正在开发中。整个购买过程都在进行，当使用Apple ID进行活动购买时，恢复也在进行。但是，当用户使用登录的Apple帐户没有活动购买时单击"恢复购买"UIButton时，我想处理这种情况。

在我的AppDelegate中，我有：

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{    
for (SKPaymentTransaction *transaction in transactions)
{
switch (transaction.transactionState)
{
case SKPaymentTransactionStatePurchased:
{
// unlock the full version
[self unlockFullVersion:transaction];
[[SKPaymentQueue defaultQueue]finishTransaction:transaction];
[self saveReceipts];
break;
}
case SKPaymentTransactionStatePurchasing:
{
// currently purchasing
break;
}
case SKPaymentTransactionStateRestored:
{
[self restoreTransaction:transaction]; 
[[SKPaymentQueue defaultQueue]finishTransaction:transaction];
break;
}
case SKPaymentTransactionStateFailed:
{
// it didn't work
break;
}
case SKPaymentTransactionStateDeferred:
{
// deferred
break;
}
}
}
}
- (void)restoreTransaction:(SKPaymentTransaction *)transaction
{
if (transaction)
{
if ([transaction.payment.productIdentifier isEqualToString:@"com.company.Unlimited"])
{
[[NSNotificationCenter defaultCenter] postNotificationName:@"CheckProVersion" object:self userInfo:nil];
[[NSUserDefaults standardUserDefaults]setBool:YES forKey:@"IAPSuccessful"];

[[NSUserDefaults standardUserDefaults]synchronize];
}
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Restore Successful" message:@"Your restore was successful." delegate:nil cancelButtonTitle:@"Thanks" otherButtonTitles:nil, nil];
[alertView show];
}
else
{
NSLog(@"The transaction does not exist");
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Restore Unsuccessful" message:@"Your Apple ID doesn't have an active purchase for upgrading to Envylope Pro. " delegate:nil cancelButtonTitle:@"Thanks" otherButtonTitles:nil, nil];
[alertView show];
}
}

在这种特殊情况下，如果事务不存在，则不会调用restoreTransaction方法中的第二个UIAlertView。

我设置了一个断点，但它永远不会被调用。我在SKPaymentTransactionStateFailed案例中设置了一个断点，我看到了这一点，当我没有活跃的购买时，它会被击中。然而，这将从AppDelegate中实际执行我想要的操作(如UIAlertView)，并且我只希望它在单独的InAppPurchaseViewController中运行。

问题

从这个InAppPurchaseViewController(离它只有几个屏幕)，我有一个恢复UIButton，我想要的是在点击按钮的过程中执行一个测试，看看是否存在这个Apple ID的事务。这样的事情可能吗？

更新

在SKPaymentTransactionStateFailed中，我放置了：

NSString * const SKErrorDomain;
NSLog(@"The error is %@", SKErrorDomain);

我得到(null)作为错误。

Answer 1

尝试添加此方法，它可以处理没有购买要恢复的情况：

- (void)paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue {
if (queue.transactions.count == 0){
NSLog(@"The transaction does not exist");
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Restore Unsuccessful" message:@"Your Apple ID doesn't have an active purchase for upgrading to Envylope Pro. " delegate:nil cancelButtonTitle:@"Thanks" otherButtonTitles:nil, nil];
[alertView show];
}
}