I am trying to implement a simple notification application, I have a xcode 4.5 on my machine. I have created a empty application and added a class which is derived from NSObject, but when i want to implement a NSUserNotificationCenter protocol for my class, compiler throwing the error : Cannot find protocol declaration for NSUserNotificationCenter. I did checked Foundation/foundation.h file and in that file if i try to go to the source of NSUserNotification.h file it says Symbol not found.
I am newbie in IPhone development, how do i make sure i have a right sdk/ framework for NSUserNotificationCenter.
Thanks in advance.