如何提供storekit内容？

Question

对于我的应用程序，我已经足够了，它将要求确认和帐户的应用程序内购买，但我不知道如何启用购买完成后的项目。

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

[SKPaymentQueue defaultQueue addPayment:支付]；

这就是我到目前为止所拥有的

[[p2Controller tabBarItem] setEnabled:TRUE];

这是我想要执行的代码

Answer 1

首先，你应该回顾一下苹果提供的In App purchase documentation -他们详细地描述了这一点，这对了解他们正在做什么很有用。

您缺少的是SKPaymentTransactionObserver --您需要负责实现这个观察者，它是您作为SKPaymentTransactionQueue的观察者添加的。Apple建议您将应用启动时的观察者添加到默认队列中，以便它能够观察到您的应用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。当iTunes商店处理支付时，这个类要做的是观察、捕获支付队列中的回调，并捕获成功和失败事件。

以下是Payment Observer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

一旦实现了PaymentObserver，就需要将一个实例作为事务观察者添加到默认支付队列中。

// Done at app launch...
PaymentObserver *paymentObserver = [[PaymentObserver alloc] init];
[[SKPaymentQueue defaultQueue] addTransactionObserver:paymentObserver];