how to set iOS 6/7 Deltas programmatically

Question

I was developing a UISplitView app by using Xcode 4.6 when I left iOS6 I had design:

Answer 1

You can create a makro for solve this problem. it is useful for me.

#define iOS7Delta (([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0 ) ? 20 : 0 )