Toggle compent's OnValueChanged event not working.

Unity Engine
,
1

I have a Toggle. When the user presses it, I see “IsOn” checking on/off. But the events in OnValueChanged are not triggered.

Here’s a demonstration of the toggle not working:
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And here are the functions I’m calling from the OnValueChanged:

using UnityEngine;

public class TestDebugOfToggle : MonoBehaviour
{

    public void IsThisWorking(bool value)
    {
        if (value)
        {
            print("Yes, it's working. Truth.");
        }
        else
        {
            print("Yes, it's still working, and we're false.");
        }
    }

    public void SaySomething()
    {
        print("Something");
    }
}
2

Sorry - I just realized, I’m not sure if should have used the Bug prefix in the thead title, or Help Wanted. There are threads with similar issues, but those are years and years old.
Am I missing something? Or is this a years-old Unity bug?

3

Hi there, just pinging back.
Does anyone have any ideas?

4

I’ve changed the handle of this thread’s title to ‘bug’.
Hoping for some support.

5

I got the same issue, fwiw. It works fine in build, or if I attach the debugger to the editor, but it does not work in play mode.

6

If I toggle the ‘isInteractible’ property on the toggle component, at runtime, then it starts to work properly. So there is clearly a unity bug.

I found a repro - it happens if your toggle is inside a scroll view. I filed a bug report.

7

Ok for anyone else who finds this - a workaround while we wait for Unity to fix the issue is to set your toggles/sliders to send events in Editor + Runtime. Toggling the isInteractible property in a script won’t work.

8

Old one but just had the same issue and found what was going on:

Watch this:

When selecting the method in the OnValueChange field you should select the from the Dynamic Bool options.

8817160--1199977--upload_2023-2-18_23-6-44.png
8817160--1199977--upload_2023-2-18_23-6-44.png528×558 26.4 KB

2 Likes
9

Hi, I just bumped into this (or a similar) issue myself and I’ve found the problem.

UNITY 2019.4.31f1

It seems that my issue was related to the Experimental “Enter Play Mode” settings:

9108211--1262974--upload_2023-6-27_16-3-1.png

Having those settings on result in the toggles not working at all until you “wake them up” by changing ANY properties of the toggle at runtime.

Haven’t tested this on any other Unity versions, and this may be another type of bug, but hope posting this here will help someone. :heart:

10

I’ve been going nuts trying to figure out why OnValueChanged is being invoked even when the gameobject is inactive!
I guess at some point I enabled that Enter Play Mode Options. If it weren’t for your post on the very same thread I started two years ago, I’d still be pulling my hair out. Thank you @xthewhitel !