title: Get xcode 4.5 to warn about new API calls
body: <p>The answer to <a href="https://stackoverflow.com/questions/4676000/is-there-a-way-for-xcode-to-warn-about-new-api-calls">this question</a> does not appear to work on xcode 4.5. To summarise it, is there a way for XCode to warn about classes, methods and procedures that are only available a later version than the deployment target?</p>