注册 登录  
 加关注
   显示下一条  |  关闭
温馨提示!由于新浪微博认证机制调整,您的新浪微博帐号绑定已过期,请重新绑定!立即重新绑定新浪微博》  |  关闭

vs-yanguo的博客

 
 
 

日志

 
 
 
 

In App Purchases: A Full Walkthrough  

2010-11-26 15:27:38|  分类: apple_IAP |  标签: |举报 |字号 订阅

  下载LOFTER 我的照片书  |


By Troy on January 17, 2010

At first glance, adding in-app purchases seems like it would be a walk in the park. Apple providesplenty of documentation that should get developers up and running in no time.

So, why is adding in-app purchases such a royal pain in the arse?

Because, inevitably, something will go wrong. And when that moment arrives, you’re screwed. Apple provides a beastly amount of documentation on in-app purchases, but they don’t provide the right kind of documentation. Nowhere is there mention of the setup steps you have to take to get in-app purchases to work. Nowhere is there a checklist you can reference if your StoreKitintegration doesn’t work. Nowhere is there an NSError object that tell you exactly why your product ID is invalid.

You are left to flounder and flail like a wet noodle as you exhaustively try every possible solution on the web.

Losing days of productivity on this is ridiculous. To save you the pain and suffering I went through, this post details every step you need to take to implement in-app purchases. It’s detailed. It’s long. It’s probably overly-detailed and overly-long. But, unlike the Apple docs, it contains every single step necessary for any developer to implement in-app purchases.

Without further ado, let’s get started.

Overview

Ok, folks, here’s the secret to getting in-app purchases working: break it into two distinct steps:

  1. Create and fetch a product description
  2. Purchase a product

The first step is where you will likely run into problems. Once you can successfully fetch a product description in code, writing the code to purchase the product is cake.

We’ll tackle the product description step first.

Create and Fetch a Product Description

Here is a (very) rough overview of each step required to create a new product and fetch its description:

  1. Create a unique App ID
  2. Generate and install a new provisioning profile
  3. Update the bundle ID and code signing profile in Xcode
  4. If you haven’t already, submit your application metadata in iTunes Connect
  5. If you haven’t already, submit your application binary in iTunes Connect
  6. Add a new product for in-app purchase
  7. Write code for fetching the product description
  8. Wait a few hours

The code for fetching a product description is really simple. The setup steps, on the other hand, are rife with peril.

NOTE: You do NOT need to create an in-app test user in iTunes Connect to fetch a product description.

1. Create a Unique App ID

To support in-app purchases, your App ID cannot include a wildcard character (“*”). To see if your App ID contains a wildcard, log in to http://developer.apple.com/iphone, and navigate to the iPhone Developer Program Portal. Select “App IDs” from the menu on the left, and look for your App ID.

This is a unique App ID:

    7DW89RZKLY.com.runmonster.runmonsterfree

This is not a unique App ID:

    7DW89RZKLY.com.runmonster.*

If you don’t have a unique App ID, create one as follows:

  1. On the App IDs tab in the developer portal, select “New App ID”
  2. Fill in the following information:
    • Display name: Pick a different App ID name than you were using before. You can’t edit or delete old App IDs, so just give your App ID a new name to avoid confusion.
    • Prefix: Generate a new one, or choose an existing one if your app is one of a suite of apps that can share data via the Keychain Services API
    • Suffixcom.companyname.appname (this is the usual format – note lack of wildcard)
  3. Click “Save”
  4. Click the “Configure” link next to your App ID
  5. Check box next to “Enable In App Purchase”
  6. Click “Done”

2. Create a New Provisioning Profile

Now that you have a new App ID, you need to generate a new provisioning profile that points to the App ID.

Here’s the painfully detailed step-by-step for generating and installing a new provisioning profile:

  1. In the iPhone Developer Portal, select the Provisioning tab on the left
  2. Make sure you’re on the Development tab, and click “New Profile” in the top-right corner
  3. Fill in the requested information, and point to the unique App ID you just created
  4. If see “Pending” in the Actions column, just click the Development tab title to refresh
  5. Click “Download” to pull down the new profile
  6. Drag the profile onto the Xcode icon in the Dock to install
  7. Alternatively, if you want to preserve the name of the provisioning profile on disk, you can install the profile manually as follows:
    1. In Xcode, select Window > Organizer
    2. Select “Provisioning Profiles” category on the left
    3. Ctrl-click an existing profile > Reveal in Finder
    4. Drag and drop the new profile into the profile Finder window

3. Update Xcode Settings

After the profile is installed in Xcode, you need to make a couple edits to the project to use the provisioning profile:

  1. Edit your project’s .plist file so the Bundle ID entry matches the App ID. Ignore the alphanumeric sequence at the beginning of the ID. For instance, if your App ID is “7DW89RZKLY.com.runmonster.runmonsterfree” in the Developer Portal, just enter “com.runmonster.runmonsterfree” for the Bundle ID.
  2. Edit your project’s target info to use the new provisioning profile:
    1. Select Project > Edit Active Target
    2. Select the “Build” tab at the top
    3. Select the configuration you want (usually Debug)
    4. Select your new provisioning profile for the row labeled Code Signing Identity
    5. Select your new provisioning profile for the row directly underneath the Code Signing Identity row (probably labeled Any iPhone OS Device)

4. Add your Application

If your application is already available on the App Store, you can skip this step.

Before you can add a product in iTunes Connect, you must add the application the product is for. Don’t worry if you aren’t a 100% done with your app. You can still submit your app wtih stub data and add the real details later.

NOTE: Only the SKU and version fields are permanent and cannot be changed later.

  1. Navigate to http://developer.apple.com/iphone, and log in
  2. Follow the right-hand link to iTunes Connect
    • NOTE: you MUST be logged in to developer.apple.com first, or bad things will happen
  3. On the iTunes Connect homepage, click the “Manage Your Applications” link
  4. In the top-right corner, click “Create New Application”
  5. Fill out all the requested information for your app. When asked for your application binary, check the box indicating you will upload it later.

5. Add the App Binary

This detail is not mentioned anywhere in Apple’s documentation, but is a requirement nonetheless. You must submit a binary for your application in order to successfully test in-app purchases. Even if you aren’t 100% done, you need to submit a binary. However, you can immediately reject the binary so it won’t go through the review process.

This was the crucial step I missed that caused me hours of grief and frustration. Follow these steps to add the binary:

  1. Build your application for App Store distribution
    • If you don’t know how, navigate to the iPhone Developer Portal, click on the Distribution tab on the left, and make sure you are in the “Prepare App” tab. Now, follow the instructions in the following blue links:
      • Obtaining your iPhone Distribution Certificate
      • Create and download your iPhone Distribution Provisioning Profile for App Store Distribution
      • Building your Application with Xcode for Distribution
  2. Navigate to your app’s page in iTunes Connect
  3. Select “Upload Binary”
  4. Upload your .zip compressed application
  5. If you aren’t 100% ready for your app to be reviewed, then click the “Reject Binary” link on your app homepage in iTunes Connect. The app’s status should update to “Developer Rejected”.

Have no fear. Apple will not review this version of the app once it is “Developer Rejected”. You can submit a new version of your app at any point, and having the status “Developer Rejected” doesn’t affect the wait time for your future submissions in the slightest.

6. Add the Product

After all that setup, we are finally ready to add the product itself to iTunes Connect.

  1. Make sure you are logged in to http://developer.apple.com/iphone
  2. Navigate to the iTunes Connect homepage
  3. Click the “Manage Your in App Purchases” link
  4. Click “Create New”
  5. Select your application
  6. Fill in the production information:
    • Reference Name: common name for the product. I used “Pro Upgrade”. This name is non-editable, and it will not be displayed in the App Store.
    • Product ID: unique id for your app. Typically of the formcom.company.appname.product, but it can be whatever you want. It does not need to have your app’s App ID as a prefix.
    • Type: You have 3 choices:
      • Non-consumable: only pay once (use this if you want a free-to-pro-upgrade product)
      • Consumable: pay for every download
      • Subscription: recurring payment
    • Price Tier: price of the product. See the price matrix for the different tiers.
    • Cleared for Sale: check this now. If you don’t, you will get back an invalid product ID during testing.
    • Language to Add: Pick one. The following two fields will appear:
      • Displayed Name: Name of your product shown to your user. I chose “Upgrade to Pro”.
      • Description: What the product does. The text you enter here is sent along with the Displayed Name and Price when you fetch an SKProduct in code.
    • Screenshot: Your feature in action. Despite the text on the screen about the screenshot submission triggering the product review process (a very sloppy design choice, IMHO), you can safely add the screenshot now without the product being submitted for review. After saving the product, just choose the “Submit with app binary” option. This will tie the product to the app binary, so when you finally submit the 100% complete app binary, the product will be submitted as well.
  7. Click “Save”

7. Write Code

Now, we finally write the code the fetches the product information we just added in iTunes Connect. To access the product data, we need to use the StoreKit framework.

NOTE: StoreKit does not work on the Simulator. You must test on a physical device.

  1. Add the StoreKit framework to your project.
  2. Add a reference to a SKProduct to your .h file:
// InAppPurchaseManager.h

#import <StoreKit/StoreKit.h>

#define kInAppPurchaseManagerProductsFetchedNotification @"kInAppPurchaseManagerProductsFetchedNotification"

@interface InAppPurchaseManager : NSObject <SKProductsRequestDelegate>
{
    SKProduct *proUpgradeProduct;
    SKProductsRequest *productsRequest;
}

NOTE: InAppPurchaseManager is a singleton class that handles every in app purchase for our app. It’s used throughout this post as an example implementation.

  1. Request the product, and implement the delegate protocol in the corresponding .m file:
// InAppPurchaseManager.m

- (void)requestProUpgradeProductData
{
    NSSet *productIdentifiers = [NSSet setWithObject:@"com.runmonster.runmonsterfree.upgradetopro" ];
    productsRequest = [[SKProductsRequest allocinitWithProductIdentifiers:productIdentifiers];
    productsRequest.delegate = self;
    [productsRequest start];
    
    // we will release the request object in the delegate callback
}

#pragma mark -
#pragma mark SKProductsRequestDelegate methods

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
    NSArray *products = response.products;
    proUpgradeProduct = [products count] == 1 ? [[products firstObjectretain] : nil;
    if (proUpgradeProduct)
    {
        NSLog(@"Product title: %@" , proUpgradeProduct.localizedTitle);
        NSLog(@"Product description: %@" , proUpgradeProduct.localizedDescription);
        NSLog(@"Product price: %@" , proUpgradeProduct.price);
        NSLog(@"Product id: %@" , proUpgradeProduct.productIdentifier);
    }
    
    for (NSString *invalidProductId in response.invalidProductIdentifiers)
    {
        NSLog(@"Invalid product id: %@" , invalidProductId);
    }
    
    // finally release the reqest we alloc/init’ed in requestProUpgradeProductData
    [productsRequest release];
    
    [[NSNotificationCenter defaultCenterpostNotificationName:kInAppPurchaseManagerProductsFetchedNotification object:self userInfo:nil];
}

A couple notes about the code above:

  • When specifying the product identifier, you must use the full product id. For instance, “com.runmonster.runmonsterfree.upgradetopro” is used above. “upgradetopro” alone will not work.
  • If response.products is nil in productsRequest:didReceiveResponse: and your product id shows up in the response.invalidProductIdentifers array, then prepare yourself mentally for a wild goose chase. The StoreKit API offers no help, no indication as to why your identifier was invalid, just that it is. Lovely, isn’t it?
  • The SKProduct class conveniently offers localized versions of your app title and description, but not price. To handle this omission, here’s a category that will provide a localized price string for the product as well:
// SKProduct+LocalizedPrice.h

#import <Foundation/Foundation.h>
#import <StoreKit/StoreKit.h>

@interface SKProduct (LocalizedPrice)

@property (nonatomicreadonlyNSString *localizedPrice;

@end

// SKProduct+LocalizedPrice.m

#import "SKProduct+LocalizedPrice.h"

@implementation SKProduct (LocalizedPrice)

- (NSString *)localizedPrice
{
    NSNumberFormatter *numberFormatter = [[NSNumberFormatter allocinit];
    [numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
    [numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
    [numberFormatter setLocale:self.priceLocale];
    NSString *formattedString = [numberFormatter stringFromNumber:self.price];
    [numberFormatter release];
    return formattedString;
}

@end

After adding all the code above, give it a shot. You should see the product information gloriously regurgitated in your console window. However, you are more than likely getting back an invalid product ID. My next post addresses exactly how to go about debugging this problem, but the very next section may in fact hold your solution.

8. Wait a Few Hours

Have you followed all the steps above to the letter, and your product is still reported as invalid? Have you painstakingly double, triple, quadruple-checked to make sure you have followed every step? Have you despaired from finding frighteningly little in-app purchase information on the web?

Then, you may just need to wait.

It takes a while for the product you added to iTunes Connect to permeate Apple’s distributed in-app sandbox environment. For me, I gave up in despair after the umpteenth time my product came back as invalid. 24 hours later, I hadn’t changed a line a code, but my IDs were coming back valid. I think it really only took a few hours for the product to propagate through Apple’s distributed network, but if you can afford to wait, you may want to give it 24 hours like I did.

Purchase a Product

At this point, you should be able to successfully fetch an SKProduct description for your product. Adding support for purchasing the product is relatively simple compared to getting the description. There are only three steps required:

  1. Write code for supporting transactions
  2. Add an in app test user in iTunes Connect
  3. Sign out of your iTunes Store account on your phone
  4. Test the purchase

We’ll start off by taking a look at the code required to support transactions.

1. Write Code for Supporting Transactions

First, a word of warning: you are responsible for developing the user interface for purchasing your product. StoreKit offers absolutely zero interface elements. If you want your purchase view to look like the App Store’s, well, you have to build it yourself.

All the code below is for the backend of the transaction process. It is a single class with a simple API that an outside class (like a view controller) can call to make the purchase. I recommend a similar approach if you are figuring out how best to integrate in app purchases in your app.

First, you need to conform to the SKPaymentTransactionObserver protocol:

// InAppPurchaseManager.h

// add a couple notifications sent out when the transaction completes
#define kInAppPurchaseManagerTransactionFailedNotification @"kInAppPurchaseManagerTransactionFailedNotification"
#define kInAppPurchaseManagerTransactionSucceededNotification @"kInAppPurchaseManagerTransactionSucceededNotification"

@interface InAppPurchaseManager : NSObject <SKProductsRequestDelegate, SKPaymentTransactionObserver>
{
    …
}

// public methods
- (void)loadStore;
- (BOOL)canMakePurchases;
- (void)purchaseProUpgrade;

@end


  评论这张
 
阅读(269)| 评论(0)
推荐 转载

历史上的今天

评论

<#--最新日志,群博日志--> <#--推荐日志--> <#--引用记录--> <#--博主推荐--> <#--随机阅读--> <#--首页推荐--> <#--历史上的今天--> <#--被推荐日志--> <#--上一篇,下一篇--> <#-- 热度 --> <#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->
 
 
 
 
 
 
 
 
 
 
 
 
 
 

页脚

网易公司版权所有 ©1997-2018