I'm developing iPhone application which was created on Xcode 4.6. Now I'm running same application in Xcode 5.0 which works fine for me on iOS 7 also. Now I have to create an Universal application from existing application. I have google for it and found 2-3 solutions which talks about creating new xibs for iPad and change target to universal application. I want to know what is the easiest way to achieve this. My application was created on Xcode 4.6 with xibs for iPhone.
If you are building a universal app that supported for both iPhone and iPad then the best approach is to use Size classes. You can also customize your layout for a specific device (iPhone/iPad) by using size classes.