Are private frameworks supported on iOS?

Question

Recently I started to modularize my applications much more aggresively than I used to, separating pieces of code into frameworks or libraries.

I like the concept of

Answer 1

It appears that custom frameworks are now supported by Xcode 6:

iOS developers can now create dynamic frameworks. Frameworks are a collection of code and resources to encapsulate functionality that is valuable across multiple projects. Frameworks work perfectly with extensions, sharing logic that can be used by both the main application, and the bundled extensions.