Custom Editor Window not displaying anything

Questions & Answers
1

Hello Everyone!

I’ve been trying recently to implement a ScriptableObject in my game that will store all items pertaining to a certain type. That way, whenever I want to make a crafting recipe (in a separate code), I can just go to the respective asset and search it’s list of items.

My ItemGroup (what I decided to call this ScriptableObject) script looks like this:

[CreateAssetMenu(fileName = "New Item Group", menuName = "Item Group", order = 0)]
    public class ItemGroup : ScriptableObject
    {
        public int type;
        public List<Item> itemGroup = new List<Item>();

        Item SearchByID(int searchId)
        {
            Item tempItem = null;
            foreach (Item item in itemGroup)
            {
                if (item.id == searchId)
                {
                    tempItem = item;
                }
            }

            if (tempItem != null)
            {
                return tempItem;
            } else
            {
                Debug.LogError("No Item with ID " + searchId + " found in ItemGroup!");
                return null;
            }
        }
    }

The ItemGroupViewer Script looks like this:

[CustomEditor(typeof(ItemGroup))]
public class ItemGroupViewer : Editor {

    Vector2 scroll = new Vector2();

    public override void OnInspectorGUI()
    {
        EditorUtility.SetDirty(target);

        //base.OnInspectorGUI();
        ItemGroup ig = (ItemGroup)target;

        EditorGUILayout.BeginVertical();

        EditorGUILayout.BeginHorizontal();
        EditorGUILayout.PrefixLabel("Item Type:");
        ItemType selected = (ItemType)ig.type;
        ig.type = (int)(ItemType)EditorGUILayout.EnumPopup(selected);
        EditorGUILayout.EndHorizontal();

        EditorGUILayout.Space();

        scroll = EditorGUILayout.BeginScrollView(scroll, GUILayout.Height(250f));
        foreach(Item item in ig.itemGroup)
        {
            ItemField(item);
        }
        EditorGUILayout.EndScrollView();
        if (GUILayout.Button("Add New Item"))
        {
            CreateNewItem(ig);
            Debug.Log(ig.itemGroup.Count);
        }

        EditorGUILayout.EndVertical();
    }
}

Everything is working fine and dandy, because it is displaying everything properly at this point. But when I close Unity and reopen it, the Inspector does not display anything at all for the ItemGroup assets, not even the file names. It only comes back when I change something in the ItemGroupViewer script, forcing Unity to reload the Inspector.

Is there a way to avoid this? Going to the script and changing it is time consuming and annoying. Besides, sometimes not even changing it works, forcing me to create a new ItemGroup and fill it with all the item names again!

PS: If it is important, the Item class present in the ItemGroup script is marked as Serializable.

2

There’s multiple things wrong with your editor script.

  1. Why does the first editor line set the target as dirty? That isn’t a thing you should do.
  2. Why are you not using PropertyField with serializedObject? It’s way better than using these other methods with target. Check the link for a nice little example.
  3. What probably causes your problem: You’re not calling ApplyModifiedProperties. Again, check the link for an example.