How to Add In App Purchase to iPhone App
I'm making an app and I need to add in-app purchases. My app is a trivia(question) game, I need to add the option for the user to be able to purchase an answer sheet for $0.99. Whenever they buy it I want for the user to unlock a button and an image, I don't need them to download anything from the web, everything is going to be inside the app. Does anyone have a sample code of how to do this, or how I can do this? 
How to Add In App Purchase to iPhone App
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I'm making an app and I need to add in-app purchases. My app is a trivia(question) game, I need to add the option for the user to be able to purchase an answer sheet for $0.99. Whenever they buy it I want for the user to unlock a button and an image, I don't need them to download anything from the web, everything is going to be inside the app. Does anyone have a sample code of how to do this, or how I can do this? 