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对于我的应用程序，我有足够的能力，它会要求确认并说明应用内购买，但我不知道如何在购买完成后启用该项目。

SKPayment *payment = [SKPayment paymentWithProductIdentifier:@"com.silver.tapp.page2"];

[[SKPaymentQueue defaultQueue] addPayment:payment];

这就是我到目前为止所拥有的

[[p2Controller tabBarItem] setEnabled:TRUE];

这是我要执行的代码

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1 回答 1

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首先，您应该真正返回并查看 Apple 提供的应用内购买文档- 他们详细概述了这一点，了解他们正在做的事情很有用。

您缺少的是 SKPaymentTransactionObserver - 您有责任实现这个观察者，您将其添加为 SKPaymentTransactionQueue 的观察者。Apple 建议您将应用程序启动时的观察者添加到默认队列，以便它能够观察您的应用程序运行时发生的所有事务。

本质上，您需要编写自己的类来实现 SKPaymentTransactionObserver 协议。这个类的作用是观察在 iTunes 商店处理付款时从付款队列中捕获回调，并让您捕获成功和失败事件。

这是支付观察者的框架：

PaymentObserver.h

#import <StoreKit/StoreKit.h>

@interface PaymentObserver : NSObject <SKPaymentTransactionObserver> {  
}

- (void) completeTransaction: (SKPaymentTransaction *)transaction;
- (void) restoreTransaction: (SKPaymentTransaction *)transaction;
- (void) failedTransaction: (SKPaymentTransaction *)transaction;

@end

PaymentObserver.m

#import "PaymentObserver.h"
@implementation PaymentObserver

- (void)paymentQueue:(SKPaymentQueue *)queue removedTransactions:(NSArray *)transactions
{
  // handle payment cancellation
}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
  // handle the payment transaction actions for each state
  for (SKPaymentTransaction *transaction in transactions)
  {
    switch (transaction.transactionState)
    {
      case SKPaymentTransactionStatePurchased:
        [self completeTransaction:transaction];        
        break;
      case SKPaymentTransactionStateFailed:
        [self failedTransaction:transaction];        
        break;
      case SKPaymentTransactionStateRestored:
        [self restoreTransaction:transaction];        
      default:
        break;
    }
  }
}



- (void) completeTransaction: (SKPaymentTransaction *)transaction;
{
  // Record the transaction
  //...

  // Do whatever you need to do to provide the service/subscription purchased
  //...

  // Remove the transaction from the payment queue.
  [[SKPaymentQueue defaultQueue] finishTransaction: transaction];

}

- (void) restoreTransaction: (SKPaymentTransaction *)transaction
{
  // Record the transaction
  //...

  // Do whatever you need to do to provide the service/subscription purchased
  //...

  [[SKPaymentQueue defaultQueue] finishTransaction: transaction];
}

- (void) failedTransaction: (SKPaymentTransaction *)transaction
{  
  if (transaction.error.code != SKErrorPaymentCancelled)
  {
    // Optionally, display an error here.    
  }
  [[SKPaymentQueue defaultQueue] finishTransaction: transaction];
}

@end

实现 PaymentObserver 后，您需要将一个实例添加到默认支付队列中作为事务观察者。

// Done at app launch...
PaymentObserver *paymentObserver = [[PaymentObserver alloc] init];
[[SKPaymentQueue defaultQueue] addTransactionObserver:paymentObserver];
于 2009-10-26T00:10:10.913 回答