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2010-11-26 15:28:25|  分类: apple_IAP |  标签: |举报 |字号 订阅

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Above, we have defined two more notifications that will be sent out with the result of the purchase transaction. For the sake of this example, we are using the InAppPurchaseManager class again, just as we did when when fetching the product description.

// InAppPurchaseManager.m

#define kInAppPurchaseProUpgradeProductId @"com.runmonster.runmonsterfree.upgradetopro"

#pragma -
#pragma Public methods

//
// call this method once on startup
//
- (void)loadStore
{
    // restarts any purchases if they were interrupted last time the app was open
    [[SKPaymentQueue defaultQueueaddTransactionObserver:self];
    
    // get the product description (defined in early sections)
    [self requestProUpgradeProductData];
}

//
// call this before making a purchase
//
- (BOOL)canMakePurchases
{
    return [SKPaymentQueue canMakePayments];
}

//
// kick off the upgrade transaction
//
- (void)purchaseProUpgrade
{
    SKPayment *payment = [SKPayment paymentWithProductIdentifier:kInAppPurchaseProUpgradeProductId];
    [[SKPaymentQueue defaultQueueaddPayment:payment];
}

#pragma -
#pragma Purchase helpers

//
// saves a record of the transaction by storing the receipt to disk
//
- (void)recordTransaction:(SKPaymentTransaction *)transaction
{
    if ([transaction.payment.productIdentifier isEqualToString:kInAppPurchaseProUpgradeProductId])
    {
        // save the transaction receipt to disk
        [[NSUserDefaults standardUserDefaultssetValue:transaction.transactionReceipt forKey:@"proUpgradeTransactionReceipt" ];
        [[NSUserDefaults standardUserDefaultssynchronize];
    }
}

//
// enable pro features
//
- (void)provideContent:(NSString *)productId
{
    if ([productId isEqualToString:kInAppPurchaseProUpgradeProductId])
    {
        // enable the pro features
        [[NSUserDefaults standardUserDefaultssetBool:YES forKey:@"isProUpgradePurchased" ];
        [[NSUserDefaults standardUserDefaultssynchronize];
    }
}

//
// removes the transaction from the queue and posts a notification with the transaction result
//
- (void)finishTransaction:(SKPaymentTransaction *)transaction wasSuccessful:(BOOL)wasSuccessful
{
    // remove the transaction from the payment queue.
    [[SKPaymentQueue defaultQueuefinishTransaction:transaction];
    
    NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:transaction@"transaction" , nil];
    if (wasSuccessful)
    {
        // send out a notification that we’ve finished the transaction
        [[NSNotificationCenter defaultCenterpostNotificationName:kInAppPurchaseManagerTransactionSucceededNotification object:self userInfo:userInfo];
    }
    else
    {
        // send out a notification for the failed transaction
        [[NSNotificationCenter defaultCenterpostNotificationName:kInAppPurchaseManagerTransactionFailedNotification object:self userInfo:userInfo];
    }
}

//
// called when the transaction was successful
//
- (void)completeTransaction:(SKPaymentTransaction *)transaction
{
    [self recordTransaction:transaction];
    [self provideContent:transaction.payment.productIdentifier];
    [self finishTransaction:transaction wasSuccessful:YES];
}

//
// called when a transaction has been restored and and successfully completed
//
- (void)restoreTransaction:(SKPaymentTransaction *)transaction
{
    [self recordTransaction:transaction.originalTransaction];
    [self provideContent:transaction.originalTransaction.payment.productIdentifier];
    [self finishTransaction:transaction wasSuccessful:YES];
}

//
// called when a transaction has failed
//
- (void)failedTransaction:(SKPaymentTransaction *)transaction
{
    if (transaction.error.code != SKErrorPaymentCancelled)
    {
        // error!
        [self finishTransaction:transaction wasSuccessful:NO];
    }
    else
    {
        // this is fine, the user just cancelled, so don’t notify
        [[SKPaymentQueue defaultQueuefinishTransaction:transaction];
    }
}

#pragma mark -
#pragma mark SKPaymentTransactionObserver methods

//
// called when the transaction status is updated
//
- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
    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];
                break;
            default:
                break;
        }
    }
}

In order to test this jumble of new code, you will need to write the code that calls the loadStore,canMakePurchases, and purchaseProUpgrade methods as well.

As you can see, there’s a good bit of code required to support transactions. For a full explanation of the code, see the official In App Purchase Programming Guide –http://developer.apple.com/iphone/library/documentation/NetworkingInternet/Conceptual/StoreKitGuide/AddingaStoretoYourApplication/AddingaStoretoYourApplication.html#//apple_ref/doc/uid/TP40008267-CH101-SW1.

The code above has a few parts that are specific to my implementation. Most notably, inprovideContent:, the @"isProUpgradePurchased" BOOL field of NSUserDefaults is set to YES. All throughout the rest of the application, this BOOL is checked to determine whether or not to enable the pro features. If you are also implementing a free to pro upgrade product, I recommend using the same approach.

2. Add a Test User

In order to try out the mess of code you just added to your project, you will need to create a user in iTunes Connect for testing in app purchases. You can use this test account to purchase a product without being charged by Apple.

To create a test user, follow these steps:

  1. Log in to http://developer.apple.com/iphone
  2. Navigate to iTunes Connect
  3. Select “Manage Users” on the iTunes Conect home page
  4. Select “In App Purchase Test User”
  5. Select “Add New User”
  6. Fill out the user information. None of the information needs to be legit. I recommend a short, fake email address and a short password since you will need to type it in your phone during testing.
  7. Select “Save”

You will enter the email and password for this user on the iPhone during your testing.

3. Sign Out On Your Device

Before you can start testing in app purchases, you must sign out of the iTunes Store on your device. To sign out, follow these steps:

  1. Open the Settings App
  2. Tap the “Store” row
  3. Tap “Sign Out”

4. Test the Purchase

Now, you are finally ready to try out an in app purchase. Testing is simple:

  1. Run your app on your device
  2. Trigger the purchase
  3. When prompted for username and password, enter your test user details

If you repeat the purchase with the same account, you will be notified that you have already made the purchase. This is fine, just click “Yes” when prompted if you want to download the product again.

That’s a Wrap

Getting in app purchases to work is a lot more painful than it should be. It took several days of blood, sweat, and tears to get it working in my own application, and hopefully this post has helped short circuit that cycle of pain and suffering for you as well.

Posted in iPhone DevelopmentTagged in app purchasesstorekit

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