Screen Space Overlay Issue

Unity Engine
1

I have a canvas set to screen space overlay with some UI elements that I would like to be able to interact with. These elements have colliders on them to detect the raycast hits.

My issue is that when I build the project, I cannot interact with the UI elements. However, when I change the Screen Space to Camera, the project works completely fine and I can click and interact with my UI elements. I was hoping someone might be able to shed some light on what I might be doing wrong.

Thanks!

2

When working with UI you don’t need colliders. UI elements have Rect Transforms which define the “Bounding Box” of the elements.
Use RectTransformUtility.RectangleContainsScreenPoint to check if a point is inside the given rectangle.

If you want to do more detailed raycast checks you can use use the method IsRaycastLocationValid on an component implementing ICanvasRaycastFilter (like Image – or you can write your own).

1 Like