为什么在恢复中断的 IAP 恢复后不调用 paymentQueueRestoreCompletedTransactionsFinished？
我的恢复实施似乎基本有效。
从 paymentQueue:updatedTransactions: 中，我使用模态活动指示器阻止 UI，为每个恢复的交易向我们的服务器发出请求，获取响应，告诉我相应（非消耗性）项目的 id被下载。我关闭交易。最后，paymentQueueRestoreCompletedTransactionsFinished 或 restoreCompletedTransactionsFailedWithError: 是我删除活动指示器的提示，如果需要的话。开始下载。到目前为止，一切都很好。有用。
如果恢复过程被中断（应用程序退出），当应用程序再次启动时， paymentQueue:updatedTransactions: 仍然可以正常工作，但我没有收到 paymentQueueRestoreCompletedTransactionsFinished 事件。因此，我错过了删除活动指示器并开始下载的提示。
有人知道这可能是什么原因造成的吗？
我的解决方法是完全忽略 paymentQueueRestoreCompletedTransactionsFinished ，而是使用 paymentQueue:removedTransactions: 来跟踪队列中的项目数量，当没有更多项目时采取相应的操作。尽管确实提供了显示更多信息的进度消息的选项，但我觉得这并不是特别优雅。
My restore implementation appears to be basically working.
From paymentQueue:updatedTransactions: I block the UI with a modal activity indicator, fire off requests to our server for each restored transaction, get responses back telling me the id of the respective (non-consumable) item to be downloaded. I close the transaction. Finally, paymentQueueRestoreCompletedTransactionsFinished or restoreCompletedTransactionsFailedWithError: is my cue to remove the activity indicator and if nec. to start downloading. So far so good. It works.
If the restore process is interrupted (app exits), paymentQueue:updatedTransactions: is still doing it's job fine when the app is started up again but I'm not getting the paymentQueueRestoreCompletedTransactionsFinished event. Thus, I'm missing the cue to remove the activity indicator and start downloading.
Anybody know what could be causing this?
My workaround is to ignore paymentQueueRestoreCompletedTransactionsFinished altogether and instead use paymentQueue:removedTransactions: to track the number of items in the queue, act ing accordingly when no more items. Doesn't strike me as particularly elegant, although does open up the option of displaying a more informative progress message.
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