I want to associate another storyboard NavigationController with ViewController

If the target on Xcode7 is iOS9, you can now view another Storyboard from the Storyboard

https://developer.apple.com/library/prerelease/ios/recipes/xcode_help-IB_storyboard/Chapters/AddSBReference.html

However, it is not available on iOS prior to iOS9, so the only way to see another storyboard is to call it by code.For example, the UIStoryboard class method storyboardWithName:bundle:

Cannot set segment between storyboards.All you have to do is do it on the code.