在应用中实现In-App Purchase
,遇到两个问题
这是我的实现代码:
- (IBAction)buyProduct1:(id)sender {
SKPayment *payment = [SKPayment paymentWithProduct:product1];
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
[[SKPaymentQueue defaultQueue] addPayment:payment];
}
- (IBAction)restorePurchases:(id)sender {
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}
- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
for (SKPaymentTransaction *transaction in transactions) {
switch (transaction.transactionState) {
case SKPaymentTransactionStatePurchasing:
break;
case SKPaymentTransactionStatePurchased:
//Can I be 100% sure that this method is only called when the product is bought?
[self product1Bought:transaction];
break;
case SKPaymentTransactionStateRestored:
//What code should I have here to safely restore product1 if the product is bought?
break;
case SKPaymentTransactionStateFailed:
break;
default:
break;
}
}
}
- (void)product1Bought:(SKPaymentTransaction *)transaction {
NSString *string = @"Product1";
[[NSUserDefaults standardUserDefaults] setObject:string forKey:@"Product1"];
NSLog(@"Product1 is bought");
[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
}
1.我想保证productBought 方法是交易成功后唯一被调用的方法。
2.如何检测product1先交易,然后再调用product1Bought 方法?