iOS custom UITabBar with Separators

Question

I have to implement a custom if let row = EventTable.rowControllerAtIndex(index) as EventDescription{ exactly like this one.

For the categories, I've used a jason cpp component. That's my current status:

The problem is that I don't know how to add the Keyboard (left/right) and the border at the bottom when one UITabBar is selected.

I've also tried some external Separator like that one: RKTabView

I've seen these posts: post 1 post 2 but I don't think adding aUITabBarItem libraries with the background would solve the problem, because it also has to look fine inImage mode.

Any ideas? Thanks