如何从恢复的交易中获得产品标识符？

Question

我已设法恢复应用内交易并从原始交易中获取交易标识符，但如何识别交易中购买的产品？ 是否可以获取以前购买的应用内商品的产品标识符？

Answer 1

，如果你的意思是你要检查所购买的物品已经用户买..是的，你可以像这样

- (void) checkPurchasedItems 
{ 
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions]; 
}//You Call This Function 

//Then this delegate Function Will be fired 
- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue 
{ 
purchasedItemIDs = [[NSMutableArray alloc] init]; 

NSLog(@"received restored transactions: %i", queue.transactions.count); 
for (SKPaymentTransaction *transaction in queue.transactions) 
{ 
    NSString *productID = transaction.payment.productIdentifier; 
    [purchasedItemIDs addObject:productID]; 
} 
} 

Answer 2

SWIFT版本：

一旦你获得了代表

func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue!) { 
    var productIds = [String]() 
    for transcation in queue.transactions{ 
     if let productID = transcation.payment?.productIdentifier{ 
     productIds.append(productID) 
     } 
    }