inmyapp purchase

i have application first this application is used by customer in demo mode and if he/she want to buy it then how i can make this type application 开发者_如何转开发or how can i use inmyapp purchase in my application or please explain in detail what is inapp purchasse...please help me....

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You can use this tutorial for InappPurchase

http://www.raywenderlich.com/2797/introduction-to-in-app-purchases

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At first you should check Getting Started with In App Purchase on iPhone OS

And for more details: In App Purchase Programming Guide

This should answer most of your questions

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and after you are done with the apple provided documentation you should have a look at In App Purchases: A full Walkthrough by Troy Brant.