iPhone 3G 4.2.1 - SKProductsRequest 委托(delegate)方法未被调用

Question

我的应用程序 FourFourTwo Stats Zone 今晚刚刚在 App Store 上线:

我已经请一些人测试应用程序内购买并在除 iPhone 3G(运行 4.2.1 - 没有测试其他 iOS 版本)以外的所有设备上都取得了成功。我试过在我拥有的设备上调试它，似乎没有调用任何 SKProductsRequest 委托(delegate)方法。这是我的代码:

- (void)requestPurchaseOfCompetition:(Competition*)competition {
    DLog("");

    if ([SKPaymentQueue canMakePayments]) {
        DLog(@"do store");

        NSString* productIdentifier = [NSString stringWithFormat:@"%@%@_%@", kPRODUCT_IDENTIFIER_PREFIX, competition.competitionId, competition.season];

        SKProductsRequest *request= [[SKProductsRequest alloc] initWithProductIdentifiers: [NSSet setWithObject:productIdentifier]];

        [[NSNotificationCenter defaultCenter] postNotificationOnMainThread:[NSNotification notificationWithName:kStoreKitHandlerNotificationRequestProductInfo object:nil userInfo:[NSDictionary dictionaryWithObject:request forKey:@"request"]]];
        request.delegate = self;
        [request start];
        [request release];
    } else {
        DLog(@"no store");

        // Warn the user that purchases are disabled.
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Store", @"Store") message:NSLocalizedString(@"In app purchasing is disabled for this device (in Settings > General > Restrictions).  Please enable this setting to purchase more competitions.", @"In app purchasing is disabled for this device (in Settings > General > Restrictions).  Please enable this setting to purchase more competitions.") delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
        [alertView release];
    }   
}

...

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
    DLog(@"response: %@", response);
    DLog(@"invalid product identifiers: %@", response.invalidProductIdentifiers);

    for (SKProduct *product in response.products) {
        DLog(@"product: %@", product);

        [[NSNotificationCenter defaultCenter] postNotificationOnMainThread:[NSNotification notificationWithName:kStoreKitHandlerNotificationGotProductInfo object:nil userInfo:[NSDictionary dictionaryWithObject:product forKey:@"product"]]];

        SKPayment *payment = [SKPayment paymentWithProduct:product];

        SKPaymentQueue *paymentQueue = [SKPaymentQueue defaultQueue];
        [paymentQueue addTransactionObserver:self];
        [paymentQueue addPayment:payment];
    }
}

- (void)request:(SKRequest *)request didFailWithError:(NSError *)error {
    DLog(@"request failed: %@,  %@", request, error);

    [[NSNotificationCenter defaultCenter] postNotificationOnMainThread:[NSNotification notificationWithName:kStoreKitHandlerNotificationRequestProductInfoFailed object:nil userInfo:[NSDictionary dictionaryWithObject:error forKey:@"error"]]];
}

- (void)requestDidFinish:(SKRequest *)request {
    DLog(@"request finished: %@", request);
}

三个委托(delegate)方法中的日志消息均未出现。

这在 3GS、iPhone 4、iPad 等上运行良好，但在运行 4.2.1 的 iPhone 3G 上运行不正常。

谁能提供任何见解？

Answer 1

您不应该在开始请求后立即释放 SKProductsRequest *request，但应该在两个委托(delegate)方法中都释放它。检查the documentation对于父 SKRequest 类，它说:

When this method (requestDidFinish or request:didFailWithError:) is called, your delegate receives no further communication from the request and can release it.

我不知道为什么这在较新版本的 SDK 中对您有用，但严格查看您的代码，可能会在响应调用委托(delegate)方法之前释放请求。

我会这样做:

- (void)requestPurchaseOfCompetition:(Competition*)competition {
    DLog("");

    if ([SKPaymentQueue canMakePayments]) {
        DLog(@"do store");

        NSString* productIdentifier = [NSString stringWithFormat:@"%@%@_%@", kPRODUCT_IDENTIFIER_PREFIX, competition.competitionId, competition.season];

        SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers: [NSSet setWithObject:productIdentifier]];

        [[NSNotificationCenter defaultCenter] postNotificationOnMainThread:[NSNotification notificationWithName:kStoreKitHandlerNotificationRequestProductInfo object:nil userInfo:[NSDictionary dictionaryWithObject:request forKey:@"request"]]];
        request.delegate = self;
        [request start];

    } else {
        DLog(@"no store");

        // Warn the user that purchases are disabled.
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Store", @"Store") message:NSLocalizedString(@"In app purchasing is disabled for this device (in Settings > General > Restrictions).  Please enable this setting to purchase more competitions.", @"In app purchasing is disabled for this device (in Settings > General > Restrictions).  Please enable this setting to purchase more competitions.") delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
        [alertView release];
    }   
}

...

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
    DLog(@"response: %@", response);
    DLog(@"invalid product identifiers: %@", response.invalidProductIdentifiers);

    for (SKProduct *product in response.products) {
        DLog(@"product: %@", product);

        [[NSNotificationCenter defaultCenter] postNotificationOnMainThread:[NSNotification notificationWithName:kStoreKitHandlerNotificationGotProductInfo object:nil userInfo:[NSDictionary dictionaryWithObject:product forKey:@"product"]]];

        SKPayment *payment = [SKPayment paymentWithProduct:product];

        SKPaymentQueue *paymentQueue = [SKPaymentQueue defaultQueue];
        [paymentQueue addTransactionObserver:self];
        [paymentQueue addPayment:payment];
    }
    [request release];
}

- (void)request:(SKRequest *)request didFailWithError:(NSError *)error {
    DLog(@"request failed: %@,  %@", request, error);

    [[NSNotificationCenter defaultCenter] postNotificationOnMainThread:[NSNotification notificationWithName:kStoreKitHandlerNotificationRequestProductInfoFailed object:nil userInfo:[NSDictionary dictionaryWithObject:error forKey:@"error"]]];
    [request release];
}