需要在应用的Xcode项目中，添加能够处理应用内购买的代码。代码示例如下：

1.在AppDelegate.m文件中导入StoreKit库 #import

2.在AppDelegate.m文件中添加以下代码： @interface AppDelegate () //SKPaymentTransactionObserver 为 SKPaymentQueue 的代理

@end

@implementation AppDelegate

• (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch.

// 监听应用内购买操作 [[SKPaymentQueue defaultQueue] addTransactionObserver:self];

return YES; }

#pragma mark - SKPaymentTransactionObserver

• (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {

for (SKPaymentTransaction *transaction in transactions) { switch (transaction.transactionState) { case SKPaymentTransactionStatePurchasing: // 正在购买中 NSLog(@"Transaction purchasing"); break; case SKPaymentTransactionStatePurchased: // 购买成功 NSLog(@"Transaction purchased"); [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; break; case SKPaymentTransactionStateFailed: // 购买失败 NSLog(@"Transaction failed"); [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; break; case SKPaymentTransactionStateRestored: // 已经购买过该商品 NSLog(@"Transaction restored"); [[SKPaymentQueue defaultQueue] finishTransaction:transaction]; break; case SKPaymentTransactionStateDeferred: // 交易等待确认 NSLog(@"Transaction deferred"); break; default: break; } } }

@end

代码解释： 1.首先，在AppDelegate.m文件中导入StoreKit库。 2.然后，在AppDelegate.m文件中添加了一个遵守SKPaymentTransactionObserver协议的代理。该代理能接收并处理应用内购买的相关操作。 3.在AppDelegate.m文件的application:didFinishLaunchingWithOptions:方法中，监听了应用内购买操作