I am working on a crossword app.

I have a SquareView that contains a Text and TextField, to show the number and letter for a particular square.

A 2D array of those SquareViews forms the grid of the puzzle.

I can navigate back and forth horizontally through the TextFields using the tab key, and all the highlighting works (current square yellow, adjacent answer squares blue, all others white or black).

My problem arises when I want to toggle navigation, to move vertically. I thought that the order in which TextFields were navigated depended on the order in which they were added, so I toggled between a VStack of HStacks (across clues, running horizontally) and HStack of VStacks (for down clues, running vertically). Nope. SwiftUI always moves from left-to-right, top-to-bottom. How can I change this? I learned from this forum about Introspect, so I can access each TextField's underlying UITextField and change ... it's color 😀, but that's not what I need. I need to be able to change order in which first responders are chosen.

Any assistance would be most welcome!