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Question by DuxDucis · Jul 26, 2013 at 02:42 AM · editorfunctionload

Is there any way to call OnLevelLoaded when loading a scene in editor?

Hey, I need to run some code when I open a scene in the editor. Is there anything similar to OnLevelLoaded that gets called when I do that? Or any workouround to do this would also be appreciated. Thanks.

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Answer by Jamora · Jul 26, 2013 at 01:36 PM

I couldn't find a callback for scene changes, so I used the OnHierarchyChange callback instead, a that (should) change when a new scene is loaded.

Now, It loads itself on Editor startup, and also creates a menuitem for turning it off/on. It is sort of hard to tell when it's running, so you might want to make a marker of some sort so you know when it's on.

 using UnityEngine;
 using UnityEditor;
 
 [InitializeOnLoad]
 public static class SceneChangeDetector 
 {
     static string loadedLevel;
     static bool working = false;
     
     static SceneChangeDetector(){
         Constructor();
     }
     
     [MenuItem("Detectors/SceneDetector")]    
     static void Constructor(){
         loadedLevel = EditorApplication.currentScene;
         if(!working){
             EditorApplication.hierarchyWindowChanged += OnHierarchyChange;
             Debug.Log("Turning Scene Detector on...");
             working = true;
         }else{
             Debug.Log("Turning Scene Detector off...");
             working = false;
             EditorApplication.hierarchyWindowChanged -= OnHierarchyChange;
         }
     }
     
     static void OnHierarchyChange(){
         if(EditorApplication.currentScene != loadedLevel){
             loadedLevel = EditorApplication.currentScene;
             /*Scene has changed; implementation here*/
         }
     }
 }
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avatar image DuxDucis · Jul 26, 2013 at 01:43 PM 0
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This worked perfectly thank you so much :)

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Answer by TonyLi · Jul 26, 2013 at 01:20 PM

Try adding ExecuteInEditMode to the script that contains OnLevelWasLoaded().

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avatar image Jamora · Jul 26, 2013 at 01:43 PM 0
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I couldn't get that to work. I think OnLevelWasLoaded is called from Appliaction.LoadLevel. At least Application.loadedLevel etc. only change when that is called.

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