ScreenSpace canvas not working

Questions & Answers
1

Hi, I am upgrading the UI of my program, but it seems like I cannot work with screen space canvas (either camera or overlay). Objects in world space canvases work fine. GameObjects show in my “Game” screen, so I am a bit confused as to what the problem may be. To be clear: objects show in the “Game” screen, but not when I press the “play” button.

I attach a composite screenshot with information about one of the objects, the canvases and the camera.

Thanks a lot!

Pablo

71335-noseeobjects.png
71335-noseeobjects.png2634×956 355 KB

2

I think I now understand what the problem is. Apparently screen-space canvases (either overlay or camera) can ONLY work with UI-specific game objects. I still do not know why other sorts of elements can be added as children of these canvases (and specially why they correctly show in the Game-preview screen!)

Even if I am missing something deeper here, using elements from the UI folder works where others don’t. I thought perhaps someone could find that useful.

3

also, if like me you only have an image on your canvas, make sure the image colour alpha is not 0!

4

I found this after an update. And the solution was:

  • Go to your Event System Game Object
  • Notice that (in Unity 2018) the Event System component script is not attached
  • Add the Event System component.
  • And Activate the StandaloneInputModule component.