In-App Purchase Programming Guide - Apple Developer

Retrieving Product Information
Getting a List of Product Identifiers
If your app has a fixed list of products, such as an in-app purchase to remove ads or enable functionality, embed
the list in the app bundle. If the list of product identifiers can change without your app needing to be updated,
such as a game that supports additional levels or characters, have your app fetch the list from your server.
There’s no runtime mechanism to fetch a list of all products configured in iTunes Connect for a particular app.
You’re responsible for managing your app’s list of products and providing that information to your app. If you
need to manage a large number of products, consider using the bulk XML upload/download feature in iTunes
Connect.
Embedding Product IDs in the App Bundle
Include a property list file in your app bundle containing an array of product identifiers, such as the following:
com.example.level1
com.example.level2
com.example.rocket_car
To get product identifiers from the property list, locate the file in the app bundle and read it.
NSURL *url = [[NSBundle mainBundle] URLForResource:@"product_ids"
withExtension:@"plist"];
NSArray *productIdentifiers = [NSArray arrayWithContentsOfURL:url];
Fetching Product IDs from Your Server
Host a JSON file on your server with the product identifiers. For example:
[
"com.example.level1",
"com.example.level2",
"com.example.rocket_car"
2013-10-22 | Copyright © 2013 Apple Inc. All Rights Reserved.
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