iphone - StoreKit:捕获失败的恢复？

Question

我正在使用恢复按钮实现应用内购买功能。

我设置了一个全新的测试用户，但没有支付任何费用。

当我点击恢复按钮并使用新的测试用户登录时，我无法捕获任何委托(delegate)方法来告诉我恢复事务已失败(因为没有任何内容可以恢复)。

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

我现在能做什么？我怎样才能捕获这样的案例？

<小时/>

补充:我有一个进度指示器，上面写着“正在联系 App Store”，并且我需要一个调用，以便在失败的情况下也可以隐藏它。

Answer 1

诺亚:这是给您的代码片段:

-(void)restore {

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


}

以及以下方法:

-(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];

}

请告诉我这是否对您有帮助......