[Solved] UI Button not working at all

My button won't even highlight on mouse over.

I have an EventSystem.
Tried with the EventSystem option Force Module Active.
I have only one Canvas.
The Canvas has a Graphic Raycaster component.
Canvas Render Mode is set to Screen Space - Overlay, also tried the other two with the camera, didn't work.
The button is a child object of the Canvas.
The button is marked as interactable and calls a function from a script.
There are no other HUD objects that are at the same place as the button.
I've added using UnityEngine.EventSystem; to my script.
Tried putting the button on different places in the hierarchy.
Tried playing the game and restarting Unity a couple of times.

There are a few more things I've tried for sure, can't remember everything at the moment.. getting desperate already.

 

don't the raycasters go on the camera? not sure if that's an issue or you just need one in the scene...

 

Hmm not sure, tried it now, if I add a Graphic Raycaster to the Camera component, it adds a Canvas component too, which should be on the Canvas GameObject. Also tried variations with this, changing the camera render mode with the Raycaster on Camera, no success once again..

 

What version of Unity, what OS are you building for? It often helps to narrow down the problem by stripping away everything then slowly adding things back. I would create a new empty test project. Add UI Button to the scene, it should automatically add a Canvas and an Event System. Then Create an Empty Game Object that is a root object in the hierarchy. Create a Script with one Public function called TestButton that just calls Debug.Log("I'm pressed"). Attach it to your GameObject, then attach the Button's OnClick to that Function in the editor. Play and press the button and see if you get the Debug Log in the console. I suspect you will.

I'd do all the above with the default settings Unity has for everything. Then change the settings to what your project has. Possibly adding more items and objects from your scene until it stops working.

 

After a long time I managed to find the problem, although it was already wrong in the tutorials default settings.

If anyone else will have a similar problem, select your Canvas GameObject and look at it's components. I had the following:
Canvas, Canvas Scaler, Graphic Raycaster, Canvas Group etc..
Select the Canvas Group component and check the boxes of "Interactable" and "Block Raycasts". It works like a charm now. Thanks everyone for your effort.

 

Hi to all,

I am using Unity 5.5.2 Personal and I've recently created a start up scene for my project. I've just put 2 UI buttons for which Unity has created a Canvas GameObject. The UI buttons are child of this Canvas.

What I've noticed is that by default the Canvas GameObject was created without the raycaster and group components (I don't remember if there was a scaler component at the initiation of the GameObject).

The solution for me was to add the 2 missing raycaster and group components with their default values (the 2 checkboxes that Sargaxon mentioned above).

Maybe my fault was that I've initially created a UI Image and a UI Text object making Unity to create the Canvas without these components. I really don't know.

 

I had this problem too, I solved my issue by enabling the Raycast Target check box in Image(Script) (button's Inspector)

 

I had this same problem though it was none of the above, i fixed mine cause i had a compile error not haveing horizontal and verticle in the inputs..

 

Good work! accidentally deleting a component and not knowing which one it was, caused the program to lock up its visual clickable functions. and re adding the component fixes it (Graphic Raycaster) thanks.

 

So, I had everything working fine. I had my Title menu and game over menu working, but only after I tried to add a pause menu in it, it made only the buttons in the scene I tried to put the pause in stop working. The Title menu works fine, but it doesn't have a event system or canvas group. I tried copying all the components from the Title menu into that game scene but then they stopped working.

 

///UPDATE///
After copying the title screen components into the game scene, even though I never altered the title components in the title screen (I just ctrl+c and ctrl+v the canvas into my game scene) they also stopped working. So now no buttons I use work. I have no clue whats wrong, because I didn't change anything, they just stopped working, and I made sure not to save, so I could go back and hard reset to my last save just in case, but after closing and reopening the project, none of the buttons work, even though Im opening from a file where they still worked.

 

Me too ! Can you help us, and I want to do a restart button who restart the scene, what is the code for that please ?

 

Same problem for me, as soon as I duplicate a button, all of the others buttons inside my Canvas stopped working… Does anyone have an idea to fix this?

It's pretty annoying since I have to re-create all the buttons any time I want to add another one.

 

Do you have your eventsystem, me I deleted it and that doesn't work... I create a new eventsystem and now all work !

 

HI,

check your event system item in the editor hierarchy, inside some check boxes are disabled after duplicating an button (thats was the problem at my side).

 

I have this problem, how i can adjust it?

 

Good sir or madam! I could give you a kiss... You fixed a lot of my issues!!! Thanks!

 

spent a good 20 minutes running through all the possibilities just to find that i had a 1000 by 1000 clear text object on the top layer that was blocking my button

 

I literally have the same exact problem with my game. Someone please help

 

Same problem with buttons , it stopped responding.

 

It worked only after removing and then attaching the button component and image component.
Interestingly never had any issue with legacy GUI

 

I was having this problem. I was developing an AR shooting game. The problem was that the Event System Game Object was moved in to Target Builder UI Game Object. I placed it outside, like it was not a child of any thing. And so the buttons started to work. Don't misplace Event System. Hope this helps.

 

I had a similar problem and thought I would share my solution.

I had a 'root' Canvas Game Object, which then had several child Canvas GameObjects.

In order for the Buttons to work, the Button's direct parent Canvas must have Graphic Raycaster component. It's not enough that the root Canvas has one.

Example:

Code (JavaScript):

1. Canvas1  // must have Graphic Raycaster for Button1 to work
2.   Button1
3.   SubCanvas1  // must have Graphic Raycaster for Button2 to work
4.     Button2
5.   SubCanvas2  // must have Graphic Raycaster for Button3 to work
6.     Button3

 

This solved it for me. Thanks! I was losing the ability to press buttons after changing scenes. It was because the event system was being destroyed when loading a new scene. DontDestroyOnLoad() solved that easy enough.

 

the problem was on event system

 

Life saver. reading yours made me realized i needed to give the canvas a higher sort order

 

In my case, the problem was in the hierarchy view.
In the Canvas, I created a GameObject.
The GameObject had 2 Button objects, and 3 another objects.
The objects inside the GameObject were not in the appropriate order.
Changing the order as it is in the scene worked for me.

 

My hierarchy goes:

CanvasMenu

 PanelMenu

  ButtonMainMenu

  ButtonRestart

(I renamed the UI element to fit the project)

 

Under Canvas in ur button check for interactable in the components

 

I did exactly the same thing because I was pretty new to Unity months ago. EventSystem is very necessary to get the UI elements work correctly in Unity.

 

UI elements under Canvas objects are rendered according to their hierarchy. Objects at the bottom will be rendered on top. So move your button to the bottom of the Canvas hierarchy, maybe something it is blocking it. Also move the Event System to the top of the hierarchy

 

OMG! You saved my life! I was almost exporting the whole project to a new one because suddenly buttons and scroll rects stop working and this answer was the best! I problably deleted it in some moment and I didn't realize it.

 

In my case i accidently deleted event system and then just forgot about it . After 4 hours i finally found what was cousing the error.

 

I F***ing love you

 

BLESS YOU!! I have been trying to figure out why my UI didn't work for literally the last 2 days. You are a lifesaver!!!

 

God swear I tried every f**king trick from the comments and nothing worked

 

Same maybe its a problem with a new version of Unity... Some scenes my buttons work and others they dont at all SO FRUSTRATING

 

For my case just now, something (nearly) transparent is blocking the button.haha

 

Works as charm, just added and all work

 

Thanks a lot @takatok was struggling to get UI button working - no where i could find step by step for UI button. Was struggling the whole day to get button click working, your steps mentioned here helped me. Thanks

 

For anyone else who stumbles across this thread and tries all the solutions listed here, and if it still doesn't fix your problem...
For me it was the Z position of my slider, it was too far on the negative Z. After zeroing it the slider worked, what was annoying was the fact that the slider still picked up on being pressed (as the slider handle changed colour when I pressed it) but wouldn't move. Just another possible fix for anyone...

 

Unity UI is a joke (tm).

I got prefab (green arrow) with canvas group on it - of course it's interactable and blocking raycasts: everything on true
It's the last object in the hierarchy.
Button (red arrow) is interactable.
There's a "Event System" component on the root object in the hierarchy, on the top of the hierarchy.
There are no other UI elements that could possible block raycasts.

And?

F***ing button does not work! And off you go, making a game.... nothing mentioned above is working. I tried to delete / create Eventsystem multiple times, I tried to delete/create button again - NOTHING.

Z values are at 0 on the button.

Make a game w/ unity - go nuts! (tm)

 

I had an image covering the whole canvas, it was supposed to be a fade out + text for the scene but it ended up blocking all the mouse clicks since it was drawn first i guess. I unchecked the raycast target on that image alone
Found the issue after reading @vinay_vidhani 's answer, ty

 

@joasus12345 Not in my case - I got all UI components placed on their respective canvas groups, so I can easily control who's blocking raycasts and who's iteractable. I don't have "free-floating" images in the hierarchy.

The way I workaround my issue above I moved button from the prefab and place it in scene hierarchy in the same level.

 

I had all of the above, including all checked indicators with the eventsystem. I believe its a weird bug. If all the above failed, try creating a new scene, which will produce an eventsystem along with it. Copy and paste that eventsystem into your current scene. I checked and compared both eventsystems from my current and the new one. They had no differences on the ui, so it may be code/buggy related.

 

i have a problem with unity 2019.3.1 somone help me!!!!!

 

i have a problem with unity 2019.3.1 somone help me!!!!!
View attachment 612970 View attachment 612973 View attachment 612970 View attachment 612973

 

I had this problem turns out I had accidentally deleted my event system.

 

was exactly the same issue in mine lol Im dumb.. Thanks btw.

 

Make sure there are no canvas component in the child except the parent