StoreKit：Catch恢复失败？ [英] StoreKit: Catch failed restore?

问题描述

我正在使用还原按钮实现应用程序内购买功能。

I'm implementing In-App purchase feature with Restore button.

我有一个全新的测试用户设置，没有任何付款。

I have a brand new test user set up, without any payments made.

当我点击恢复按钮，并使用新的测试用户登录时，我无法捕获告诉我的任何委派方法恢复交易失败（因为没有要恢复的内容）。

When I hit the restore button, and log in with the new test user, I cannot catch any delegated methods that tell me that the restoring transaction has failed (since there is nothing to restore).

唯一被调用的方法是 - （void）paymentQueueRestoreCompletedTransactionsFinished：（SKPaymentQueue *）queue ，但在恢复成功的情况下调用此方法。

The only method that get invoked is -(void)paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue*)queue, but this method gets called in the case when restoring was successful too.

什么可以我现在做的？我怎么能抓住这样的情况呢？

What can I do now? How can I catch such a case?

另外：我有一个进度指示器，上面写着联系App Store，以及我需要一个调用，我也可以在失败的情况下隐藏它。

Addition: I have a progress indicator that says "Contacting App Store", and I need an invocation where I can hide it in failed cases too.

推荐答案

Noah：这是给你的代码片段：

Noah: here's a code snippet for you:

-(void)restore {

    [self.delegate showLoadingScreen];
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];


}

以下方法：

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

    if (!queue.transactions || [queue.transactions count] == 0) {

        [self showAlertScreenWithTitle:@"Error Restoring Subscription" message:@"No subscription was found to restore."];

    } else {

        BOOL didRestore = NO;

        for (SKPaymentTransaction *t in queue.transactions) {

            if (t.transactionState == SKPaymentTransactionStateRestored || t.transactionState == SKPaymentTransactionStatePurchased) {

                NSTimeInterval now = [[NSDate date] timeIntervalSince1970] - _timeOffset;
                NSTimeInterval expire = [t.transactionDate timeIntervalSince1970] + kExplorerSubscriptionSecondLength;
                NSTimeInterval purchase = [t.transactionDate timeIntervalSince1970];

                if (purchase <= now && now <= expire) {

                    didRestore = YES;
                }

            }


        }

        if (!didRestore)
            [self showAlertScreenWithTitle:@"Error Restoring Subscription" message:@"No subscription was found to restore."];

    }    

    [self.delegate dismissLoadingScreen];

}

如果有帮助，请告诉我....

Let me know if that helps you....

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