How does sceneClosing callback work?

This is what I'm doing right now:

Code (csharp):

1.  
2. [ExecuteInEditMode]
3. public class SomeScript : MonoBehaviour {
4.    void Start ()
5.    {
6.       UnityEditor.SceneManagement.EditorSceneManager.sceneClosing += SceneClosing;
7.    }
8.  
9.    void SceneClosing(Scene scene, bool removingScene)
10.    {
11.       Debug.Log("It's working");
12.    }
13. }
14.  

I would expect when scene is closed, I would see "It's working" on the console. But I get nothing.

 

I just tested the following code and all events do work, except sceneClosing and sceneClosed. I guess it's a bug in the editor, I tested 2017.3.0p2.

EDIT: I was able to reproduce this issue with 2018.1.0b7 as well and submitted a bug-report:
https://issuetracker.unity3d.com/is...-are-not-called-when-switching-between-scenes

Code (CSharp):

1. [InitializeOnLoad]
2. class SceneClosingCallbackTest
3. {
4.     static SceneClosingCallbackTest()
5.     {
6.         UnityEditor.SceneManagement.EditorSceneManager.sceneClosing += SceneClosing;
7.         UnityEditor.SceneManagement.EditorSceneManager.sceneClosed += SceneClosed;
8.         UnityEditor.SceneManagement.EditorSceneManager.sceneOpening += SceneOpening;
9.         UnityEditor.SceneManagement.EditorSceneManager.sceneOpened += SceneOpened;
10.         UnityEditor.SceneManagement.EditorSceneManager.newSceneCreated += NewSceneCreated;
11.     }
12.  
13.     static void SceneClosing(UnityEngine.SceneManagement.Scene scene, bool removingScene)
14.     {
15.         Debug.Log("SceneClosing");
16.     }
17.  
18.     static void SceneClosed(UnityEngine.SceneManagement.Scene scene)
19.     {
20.         Debug.Log("SceneClosed");
21.     }
22.  
23.     static void SceneOpening(string path, UnityEditor.SceneManagement.OpenSceneMode mode)
24.     {
25.         Debug.Log("SceneOpening");
26.     }
27.  
28.     static void SceneOpened(UnityEngine.SceneManagement.Scene scene, UnityEditor.SceneManagement.OpenSceneMode mode)
29.     {
30.         Debug.Log("SceneOpened");
31.     }
32.  
33.     static void NewSceneCreated(UnityEngine.SceneManagement.Scene scene, UnityEditor.SceneManagement.NewSceneSetup setup, UnityEditor.SceneManagement.NewSceneMode mode)
34.     {
35.         Debug.Log("NewSceneCreated");
36.     }
37. }

 

Hey! Thank you so much.

 

Did this get fixed? Having a little trouble digging up @Peter77 's ticket. i'm on 2018.3.2f1 and still not seeing it firing.

I suspect this *probably* works if you call `UnityEditor.SceneManagement.EditorSceneManager.CloseScene`, but that seems to require multiple scenes to be loaded. This is conjecture on my part based on the warning unity gives when calling CloseScene on the active scene.

I really just want a hook when the current scene is about to close so i can clean up some garbage monobehaviours before it's saved.

 

Nope, it's not marked as "Fixed" yet:
https://issuetracker.unity3d.com/is...-are-not-called-when-switching-between-scenes

 

Guys, vote for this issue, please, or it will never be fixed.

 

the only 2 that work in 2019.2 are SceneOpening and SceneOpened

 

Was this issue also affecting 2020.1?
Just tested on 2020.1.0a22 and it seems to be working.

Edit: If you use "discard changes" in a scene, it seems to call the close/closing twice.
The seconds call will have invalid scenes (can be seem below: "scene.name" is empty)