Unity IOS IAP

http://gods2000.tistory.com/entry/Unity3D-iOS-In-App-Purchase  // full

http://www.phonesdevelopers.com/1754306/ 

http://game.dapps.net/gamedev/in-app-purchase/3080.html

http://www.360doc.com/content/13/0719/15/12282510_301089691.shtml