GUI Button, doesn't work in World Space.

So,

If i'm in "Screen space - Overlay " mode in canvas. Button works.

And if i'm in "World Space", button does'nt react.

Any idea ? (I tried five time from scratch with almost all the setting I see ><)

 

Problem Solved :

You have to select a camera, in "Canvas < Render Mode < Event Camera"

 

thanks had the same problem!

 

Thanks was having same problem.

 

Thank you so much Otactu, I've been having this problem for weeks now and thought about the RayCaster and button texts and Canvas's, also backrounds and about the canvas being in the negative in the scale, but this was the problem all along. Thanks much!!!!

 

here better tutorial
https://unity3d.com/learn/tutorials/topics/user-interface-ui/ui-canvas?playlist=17111

 

If its not the case also try removing check on Graphic Raycaster > Ingore Reversed Graphics on WorldSpace Canvas which worked for me.

 

Oh this worked for me! Thanks a lot

 

If you still having this issue check if your event camera is in front of your world space canvas. It may be able to see behind because of Clipping Planes parameters.

 

Totally work for me!!
Thank you very much!!

 

This works for me as well

 

ALSO -> Make sure you do not have a VR headset plugged in!

 

Thanks . it solved my problem

 

I’m having the same problems but the above solutions does not help. Ive read through and looked at the various unity docs and videos.

The event camera is set and I have tried setting the ignore reversed graphics checkbox. Are there any other considerations i might have missed?

I can’t see anything that might block the camera view and the buttons are visible. Is there a way to debug what the selection ray hits?
____
edit:
solved it, had another canvas on top of the one I was trying to interact with. It was in screen overlay mode. When going through the scene view and trying to figure out if anything blocked the rays it didn't show (quite obvious since it was in overlay mode).

 

The problem for me was that the ARCamera in scene was culling everything except UI. I changed the Layer of the canvas to default and it fixed the problem.

 

If turning on reverse raycasting worked for you, you probably rotated the world space canvas so that its forward vector it pointing away from the camera. You can fix this by rotating it around so that the green translation gizmo points towards the camera. Turning on reversed raycasting will fix the problem, but you may get weird behavior in more complicated setups!

 

If any of this still isn't working, try moving the EventHandler so that it isn't inside the Canvas inside the hierarchy.
Also make sure you've got one aswell.

 

That worked for me, thanks!

 

If all of this still isn't working for you, try increasing the "Order in Layer" on the Canvas.

 

Another issue could be colliders blocking the ray. If possible, move the collider behind the UI.

More details here:
https://forum.unity.com/threads/object-with-boxcollider2d-seems-to-block-ui-interaction.447224/

 

When I encountered this issue (except even when changing to Screen Space - Overlay it still wasn't working) through some copy+paste error, I managed to not bring the EventSystem object over and so the buttons didn't work. Silly mistake.

 

Make sure your button looks in the right direction. It must look along with the camera forward vector. Not face the camera.
Or
Uncheck 'Ignore Reversed Graphics' on GraphicRaycaster

 

thanks this one solved my problem lmao

love how 5 different problem types got solved because someone solved his own problem

 

Chiming in to ad... make sure there is a Graphics Raycaster component on your canvas. This was my problem all along.

 

GUYS IF ANY OF YOU ARE HAVING THIS PROBLEM AND FOUND NO FIX:
I was sitting here over 2 weeks trying to find a solution

MAKE SURE THE ROOT OBEJCT OF THE CANVAS DOES NOT HAVE A RIGIDBODY ATTECHED

If it has a Rigidbody, simply freeze the x,y,z positions of it

I hope I saved you some time...

 

I had the same issue, but solution was a bit different.
In our project we have VR plugins, but I was just testing things with mouse, so Camera component by default had "Target Eye" set to "Both". Setting it to "None" fixed the issue.

 

This did it for me! Thanks!

 

Thank you so much! It worked for me. Took me 2 hours to solve this.

 

Well that fixed my problem thank you and agree wih you with all my cells ))

 

Finally fixed my issue. Thanks and wow. Would have not been able to figure it out on my own.

 

Thanks for that.

 

Thanks!

 

Absolute life saver. Had my players UI in the way even though nothing was showing on it. Disabled that when I needed to access the world space canvas, worked flawlessly. Thank you!!!!

 

In addition to the things people suggested above: In 2021.3 if you have VR enabled (i.e. you have VR packages enabled in the package manager), world space canvases won't respond to mouse input until you change Target Eye to None (Main Display).