I have a basic drill down interface for iOS devices.
A -> B -> C -> D
The problem is that the following interface would work equally well:
A -> C -> B -> D
What I need is some kind of diamond shaped UI.
A -> (B and C) -> D
How can I design a UI for iOS with a diamond shaped drill down interface?
P.S. Both B and C must have a selection made, it is not an B or C situation.