Now that we have set up our Product ID for our In-App Purchase in iTunes Connect, we can implement it into our app to purchase the product we're going to sell. A sample menu app of Breakout was created to demonstrate how to purchase levels within an application. The app contains two levels in the level select screen. The first one is available by default and the second one is locked and can only be unlocked by purchasing it for $0.99. We're going to create a level select screen so it acts in that manner.
In the
Chapter 11folder, copy theBreakout In-App Purchase Demoproject folder to your desktop. You can download the project files accompanying this book from the Packt website. You will notice that the configuration, libraries, assets and.luafiles needed are included.Create a new levelselect.lua file and save it to the project folder.
Set up the scene with the following variables and saving/loading functions....