SimplePurchase is a lightweight wrapper for in-app purchases on the iOS platform. It is inspired by Parse's in-app purchase API. However, unlike Parse, SimplePurchase:

• Does less. No verification of receipts, no handling of downloadable content, no UI for a store, etc.
• Does not depend on the Facebook SDK.
• Is available as a CocoaPod.

Although Parse felt a little too heavy for the project from which this library was extracted, I strongly suggest checking them out. Here's a link to Parse's in-app purchase documentation.

Installation

Add the following to your Podfile and run the pod command to install:

pod 'SimplePurchase', '~> 0.0.1'

If you're not using CocoaPods, copy all of the files inside the Classes subdirectory into your project.

Example Usage

First, register an observer for your product. This should be done right after the app has launched:

[SimplePurchase addObserverForProduct:@"com.example.MyApp.pro"
                                block:^(SKPaymentTransaction *transaction)
{
    // the purchase has been made; make a record of it and perform whatever
    // changes neccessary in the app.
}];

Second, when the user has requested to make the purchase, initiate the purchase and notify the user of any error:

[SimplePurchase buyProduct:@"com.example.MyApp.pro" block:^(NSError *error)
 {
    if (error)
    {
        [[[UIAlertView alloc] initWithTitle:@"Purchase Error"
                                    message:error.localizedDescription
                                   delegate:nil
                          cancelButtonTitle:@"OK"
                          otherButtonTitles:nil] show];
    }
 }];