Custom editor does not register changes to my object

I have a simple object with an array of data:

Code (CSharp):

1. [Serializable]
2. public class MapGenerator : MonoBehaviour
3. {
4.     [SerializeField]
5.     private int mapHeight = 0;
6.  
7.     [SerializeField]
8.     private int mapWidth = 0;
9.  
10.     [SerializeField]
11.     public TileTypes[] Tiles;
12. }

I started (like many others) with creating a 2D array, but have realized Unity doesn't work well with 2D arrays.
Anyway. I then created a simpleeditor:

Code (CSharp):

1. [CustomEditor(typeof(MapGenerator))]
2. public class MapEditor : Editor
3. {
4.     public override void OnInspectorGUI()
5.     {
6.         MapGenerator map = target as MapGenerator;
7.  
8.         map.MapHeight = EditorGUILayout.IntSlider("Map Height", map.MapHeight, 0, 15);
9.         map.MapWidth = EditorGUILayout.IntSlider("Map Width", map.MapWidth, 0, 15);
10.  
11.         for (int row = 0; row < map.MapHeight; row++)
12.         {
13.             for (int column = 0; column < map.MapWidth; column++)
14.             {
15.                 map.Tiles[(row * map.MapWidth) + column] = (TileTypes)EditorGUILayout.EnumPopup(map.Tiles[(row * map.MapWidth) + column]);
16.             }
17.         }
18.  
19.         SceneView.RepaintAll();
20.     }
21. }

All this works a little bit. If I change a few tiles it does it correctly in the code and it shows correctly when playing. Unfortunately it doesn't save when closing. No matter what I change on the map, whenever I close Unity, Unity closes down without saving any of the changes. It obviously doesn't register I have made a change. Even if I manually click on the Save button before I close Unity, it will not save any changes made
On the other hand, if I make a few changes on the map, then in the scene make a change to another object (e.g. move the camera a bit) and closes Unity, it will ask if I want to save the changes. If I press yes to save the changes, it will also save the changes to the map.

Any idea on why it will only save changes to my map, if I make changes to other objects in the scene?

 

You need to set the object as dirty when it was modified:

Code (CSharp):

1. EditorGUI.BeginChangeCheck ();
2. ...
3. if( EditorGUI.EndChangeCheck())
4.     EditorUtility.SetDirty(map);

 

Thanks, but it doesn't seem to make any difference. The SetDirty(map) code is called when making a chance, but Unity still does not register any change on the object and closing Unity will still leave it unsaved

Edit:

By searching for your code, I managed to find this code that fixes the problem:

Code (CSharp):

1. UnityEditor.SceneManagement.EditorSceneManager.MarkAllScenesDirty();

Thanks for the help