在用户选择购买按钮之前以应用价格显示

Question

我有一个应用内购买应用。一切按设计工作...在应用程序购买工作，但我试图显示本地价格之前用户选择立即购买按钮。

目前，我的代码只会在启动流程后显示价格......

这是代码

-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{

NSLog(@"IAP: Received Response");

// add wait text here
iAPnote.text = @"Connecting With App Store...";

SKProduct *validProduct = nil;
int count = [response.products count];

if (count>0) {

    NSLog(@"IAP: Available, starting transaction");

    validProduct = [response.products objectAtIndex:0];

    SKPayment *payment = [SKPayment paymentWithProduct:validProduct];
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
    [[SKPaymentQueue defaultQueue] addPayment:payment];

    // shows the cost of the in-app-purchase in the local currency (Canada / United States etc) using SKProduct+LocalizedPrice .h and .m helper files

    [self.iAPprice setText:[NSString stringWithFormat:
                            @"Price: %@",validProduct.localizedPrice]];


} else {

    NSLog(@"IAP: Item not found");

    UIAlertView *tmp = [[UIAlertView alloc]
                        initWithTitle:@"Internet Connection Required"
                        message:@"You must connect to a Wi-Fi  or cellular data network to perform an In-App Purchase."
                        delegate:self
                        cancelButtonTitle:nil
                        otherButtonTitles:@"Ok", nil];
        [tmp show];
}
}

您会在第一个屏幕截图中注意到价格未显示...这是初始视图...一旦用户点击解锁按钮，则启动操作以查找价格，然后显示它...如何在没有用户启动过程的情况下实现此操作...如何在用户点击该按钮之前显示价格？

我需要启动viewDidLoad中的某些内容吗？