how to save a field in custom Editor only?

Code (CSharp):

1. class mono : MonoBehaviour
2. {
3.  
4.     public int other;
5.  
6. }
7.  
8. [CustomEditor(typeof(mono), true)]
9. class monoEditor : Editor
10. {
11.  
12.     int someint;  // i want this int to be different for every instance of mono and to be saved when I restart Unity
13.  
14.     public override void OnInspectorGUI()
15.     {
16.         base.OnInspectorGUI();
17.         someint++;
18.         if (someint % 3 == 0)
19.         {
20.             ((mono)target).other = someint;
21.         }
22.     }
23.  
24. }

 

EditorPrefs is your friend here.

Code (CSharp):

1.  
2. public static int myValue
3.    {
4.        get { return EditorPrefs.GetInt("MyCustomEditor.MyValue", defaultValue); }
5.        set { EditorPrefs.SetInt("MyCustomEditor.MyValue", value); }
6.    }
7.  

Note that there probably is a performance cost to accessing EditorPrefs very frequently, but for editor code, you usually get to get away with such crimes.

Cheers

 

You'll need to use the instance id of the `target` as the pref key to get and set the preference.

Code (CSharp):

1. private void OnEnable()
2. {
3.     key = target.GetInstanceID();
4.     someint = EditorPrefs(key + ".someint", 0);
5. }

 

ty, guys

 

The instance ID isn't guaranteed to match across multiple sessions. That might work to store settings for multiple instances over a session, but you're going to fill up EditorPrefs with values that are never re-used. It's a leak situation.

Ideally, you'd assign each instance a unique id that is guaranteed to always be the same for that instance on every session. If they spawn by code, it could be a hash of the object name where the name gets an incremental value, like 'myObject_1', ',myObject_2' and so on.

Cheers

 

Yeah, having a lot of keys will become problematic for the registry due to leaks. So you could instead serialiaze a sequence of values into a single pref, like an array would, and if you manage to get a sequential ID assignment to every instance then you could possibly map it directly to the pref.