I want to make my appliaction only in landscape orientation in ios (Both ios 5 and ios 6)

Question

I have use the Xcode 4.5.1 and use this conditions

#define IOS_OLDER_THAN_6 ( [ [ [ UIDevice currentDevice ] systemVersion ] floatValue ] < 6.0 )
#define         


        

Answer 1

Your approach is not healthy. The preprocessor blocks will only get compiled if #ifdef statements are true. What you have done is to make the preprocessor statements depend on runtime parameters.

You can try removing all preprocessor blocks. Make your deployment target 5.0.

Edit: FYI, these methods are callback methods so they will get called by system if needed. iOS5 will call shouldAutorotateToInterfaceOrientation method likewise iOS6 will call supportedInterfaceOrientations and iOS6's rotation methods accordingly. So you should handle all your system differences on runtime, not compile-time, unless you are compiling two different versions of app for two different systems on purpose.