处理 iPhone 上的应用内购买（或恢复购买）时显示进度指示器
如何在 iPhone 上处理应用内购买过程中显示进度指示器？我知道如何显示进度/活动指示器本身，但我需要知道何时启动它。如果我在调用方法后立即启动它，
[[SKPaymentQueue defaultQueue] addPayment:payment];
当用户出现 iTunes 帐户密码提示时，我将看到该指示器。我想在这个提示已经通过后开始进度。另外，恢复已完成的交易也是如此：
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
我尝试将指示器连接到 SKPaymentTransactionStatePurchasing 状态
paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
，但仍然在密码提示之前启动它。有什么建议吗？
How do I show a progress indicator during processing of in-app purchase on iPhone? I know how to display progress/activity indicator itself, but I need to know when to start it. If I start it right after calling
[[SKPaymentQueue defaultQueue] addPayment:payment];
method I will see the indicator when user is presented with iTunes account password prompt. I would like to start the progress when this prompt has been already passed. Also, the same thing for restoring completed transactions:
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
I tried to hook up the indicator to SKPaymentTransactionStatePurchasing state within
paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
but still get it started before the password prompt. Any suggestions?
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我不认为交易有进展通知。我为 IAP 所做的就是抛出一个旋转器。唯一可以真正显示进度的情况是购买包含下载，您可以从中自行跟踪下载进度。
I do not believe that there is a progress notification for the transaction. What I do for IAP is to throw up a spinner. The only time you can really display progress is if the purchase includes a download, from which you can track download progress on your own.