iOS应用内购买永远不会完成

我正在尝试为我的应用创建应用内购买，但我遇到了问题 . 付款流程开始，用户必须输入密码;但是，付款从未实际完成 . 我知道我在iTunesconnect中设置了正确的标识符，我还创建了一个测试帐户来购买应用内购买 .

当我运行下面的代码时，我得到以下消息输出：

“用户可以付款”

“产品可用”

“交易状态 - >采购”

输入密码后，系统会提示我在Sandbox环境中确认我的应用程序内购买 . 我点击购买，提示消失;但是我从来没有得到实际购买的消息 . 只是没有任何反应 . 没有启用附加组件，没有 . 这在模拟器和实际设备上都会发生 . 但是，如果我按取消而不是购买，我会收到“交易状态 - >已取消”消息 .

知道我做错了什么吗？

- (void)buyTapped {
    if ([SKPaymentQueue canMakePayments]) {
        NSLog(@"User can make payments");
        SKProductsRequest *productRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:kLineColorProductIdentifier]];
        [productRequest setDelegate:self];
        [productRequest start];
    }
    else {
        NSLog(@"User cannot make payments");
    }
}

#pragma mark - SKProductsRequestDelegate

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
    validProduct = nil;
    int count = (int)[response.products count];
    if (count > 0) {
        validProduct = [response.products objectAtIndex:0];
        NSLog(@"Products are available");
        SKPayment *payment = [SKPayment paymentWithProduct:validProduct];
        [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
        [[SKPaymentQueue defaultQueue] addPayment:payment];
    }
    else if (!validProduct)
    {
        NSLog(@"Product not available");
    }
}

- (void)restore {
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue
{
    NSLog(@"received restored transactions: %lu", (unsigned long)queue.transactions.count);
    for(SKPaymentTransaction *transaction in queue.transactions){
        if(transaction.transactionState == SKPaymentTransactionStateRestored){
            //called when the user successfully restores a purchase
            NSLog(@"Transaction state -> Restored");

            [self enableLineColors];
            [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
            break;
        }
    }
}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
    for(SKPaymentTransaction *transaction in transactions){
        //[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
        switch(transaction.transactionState){
            case SKPaymentTransactionStatePurchasing:
                NSLog(@"Transaction state -> Purchasing");
                break;

            case SKPaymentTransactionStatePurchased:
                [self enableLineColors];
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                NSLog(@"Transaction state -> Purchased");
                break;

            case SKPaymentTransactionStateRestored:
                NSLog(@"Transaction state -> Restored");
                [self enableLineColors];
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;

            case SKPaymentTransactionStateFailed:
                if(transaction.error.code == SKErrorPaymentCancelled){
                    NSLog(@"Transaction state -> Cancelled");
                    //the user cancelled the payment ;(
                }

                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;

            case SKPaymentTransactionStateDeferred:
                NSLog(@"Transaction state -> Deferred");
        }
    }
}