Question

我跟着this tutorial来帮助我添加应用内购买。它工作得很好，除了现在我正在尝试添加另一个非消耗性IAP。我定义了我的第二个产品ID，并为购买按钮创建了一个方法，但是我不确定是否必须为这个额外的项目创建另一个SKProductsRequest，或者我是否使用相同的项目等...

这是我的完整代码。

#define kRemoveAdsProductIdentifier @"099"
#define kDoubleEarningRateProductIdentifer @"199"

- (void)removeAds{
    NSLog(@"User requests to remove ads");

    if([SKPaymentQueue canMakePayments]){
        NSLog(@"User can make payments");

        SKProductsRequest *productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:kRemoveAdsProductIdentifier]];
        productsRequest.delegate = self;
        [productsRequest start];

    }
    else{
        NSLog(@"User cannot make payments due to parental controls");
        //this is called the user cannot make payments, most likely due to parental controls
    }
}

- (void)doubleEarningRate{
    NSLog(@"User requests 2x earning rate");

    if([SKPaymentQueue canMakePayments]){
        NSLog(@"User can make payments");

        SKProductsRequest *productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:kDoubleEarningRateProductIdentifer]];
        productsRequest.delegate = self;
        [productsRequest start];

    }
    else{
        NSLog(@"User cannot make payments due to parental controls");
        //this is called the user cannot make payments, most likely due to parental controls
    }
}

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{
    SKProduct *validProduct = nil;
    int count = [response.products count];
    if(count > 0){
        validProduct = [response.products objectAtIndex:0];
        NSLog(@"Products Available!");
        [self purchase:validProduct];
    }
    else if(!validProduct){
        NSLog(@"No products available");
        //this is called if your product id is not valid, this shouldn't be called unless that happens.
    }
}

- (void)purchase:(SKProduct *)product{
    SKPayment *payment = [SKPayment paymentWithProduct:product];
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
}

- (void) restore{
    //this is called when the user restores purchases, you should hook this up to a button
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue
{
    NSLog(@"received restored transactions: %i", queue.transactions.count);
    for (SKPaymentTransaction *transaction in queue.transactions)
    {
        if(SKPaymentTransactionStateRestored){
            NSLog(@"Transaction state -> Restored");
            //called when the user successfully restores a purchase
            [self doRemoveAds];
            [self doubleEarningRate];
            [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
            break;
        }

    }

}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
    for(SKPaymentTransaction *transaction in transactions){
        switch (transaction.transactionState){
            case SKPaymentTransactionStatePurchasing: NSLog(@"Transaction state -> Purchasing");
                //called when the user is in the process of purchasing, do not add any of your own code here.
                break;
            case SKPaymentTransactionStatePurchased:
                //this is called when the user has successfully purchased the package (Cha-Ching!)

                [self doRemoveAds]; //you can add your code for what you want to happen when the user buys the purchase here, for this tutorial we use removing ads
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                NSLog(@"Transaction state -> Purchased");
                break;
            case SKPaymentTransactionStateRestored:
                NSLog(@"Transaction state -> Restored");
                //add the same code as you did from SKPaymentTransactionStatePurchased here
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;
            case SKPaymentTransactionStateFailed:
                //called when the transaction does not finnish
                if(transaction.error.code != SKErrorPaymentCancelled){
                    NSLog(@"Transaction state -> Cancelled");
                    //the user cancelled the payment ;(
                }
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;
        }
    }
}



-(void)doRemoveAds
{
    areAdsRemoved = true;
    NSLog(@"Ads Removed");
    [topBanner removeFromSuperview];
}

-(void)doDoubleEarningRate
{

}

我还阅读了苹果文档，其中向我解释了每个部分的功能，但我仍然对如何添加其他购买仍然毫无头绪，而且大多数其他教程都是以不同方式或过时方式完成的。所有的变量和间接对我来说都有点吓人。所以我希望有人能给我一个快速的分步指南，以便添加另一个购买。

为了更清楚，这种方法适用于购买应用程序中的一个。但是，我不知道如何添加更多，因为我不知道如何让程序识别正在选择哪个应用内购买。

感谢。

Answer 1

我通过创建一个名为provideContent:(NSString *)productId的方法来解决这个问题。然后，您可以使用switch语句或if语句来区分产品ID。无需创建多种类型的productRequest方法等...

添加更多应用内购买

1 个答案: