How to get 'object touched' (Non-GUI)?

Please forgive if asked/answered, so many posts!

I have some in-scene (NOT GUI!) objects I need to know if the user touches (clicks).

In my Win/Mac version I have a collider on my object which repsonds to OnMouseDown

What’s the equivalent for iPhone, if any? I’ve seen the GUI solutions, not what I need.

Use raycasting maybe ?

I did something for a House scene where my menu was actually object in this scene.

you could also look at EZGUI cause he use a raycasting system also that allow you to interact with object other that the GUI look type one.

Thats exactly what you must do

OnMouseDown has no counterpart as it is very heavy on calculation, nothing to pull off on a mobile

Thanks, just the ticket.