What can be the best approaches to start modular programming using Swift?

As we have various design patterns to develop iOS App. But which can do the best when we need to create modules.

For Example, if we are building the generic framework which have modules and has ability to grab modules based on the requirement, and app will not get affected if we add/replace new modules. So we can connect all the modules, to make app work as expected.

So my question is, which are the best approaches we can use or consider to create modules and they will get connected to each other, based on the modules loaded in workspace.

Also which will be better to use while doing modular programming, each separate storyboard for each module or Nib files for each class.

Modules can be multiple layouts for navigation, multiple layouts for detail views, and so on.

I went thought the Modular Programming articles http://ift.tt/1pGjzP4, http://ift.tt/22fdaIx, but all are just theoretical.