Show Prefabs in custom Editor Window

Hey, im working on some "Tools" that help me whit Level creation. I made a custom Editor Window and want to show Prefabs from a specific folder in it, so i can drag and drop it from there to the world.

Until now i cant find a solution for that.

Can anyone help?

 

You can use the File.IO classes to list asset files on the specified path - and then AssetDatabase.LoadMainAssetAtPath to get a reference to the asset data. Use UnityEditor.EditorGUI.ObjectField or UnityEditor.DragAndDrop to create GUI with draggable references to those prefabs.

 

Awesome, thanks. Cant wait till i was at home

 

i get so far that i get the filenames of my prefabs, now i try to put them to an array but i always get a
NullReferenceException: Object reference not set to an instance of an object error.

Code (CSharp):

1. private static GameObject[] prefabs = null;
2.  
3.   private static void getPrefabs()
4.     {
5.      
6.          string[] search_results = System.IO.Directory.GetFiles("Assets/Prefabs/", "*.prefab",       System.IO.SearchOption.AllDirectories);
7.  
8.              for (int i = 0; i < search_results.Length; i++ )
9.              {
10.                  Object prefab = null;
11.                  prefab = AssetDatabase.LoadAssetAtPath(search_results[i], typeof(GameObject));
12.                  prefabs[i] = prefab as GameObject;
13.  
14.                  Debug.Log(prefabs[i].name + " " + prefabs.Length);
15.              }
16.    }

I dont know what im doing wrong here.


Here is the whole Script if anyone is interested:
http://pastebin.com/QF8khq7A

 

First, verify which reference is null. Second, use "AssetDatabase.LoadMainAssetAtPath (path) as GameObject" in stead.

 

oh, i didnt realize that i have to set a size to the array. Now its clear to me why i got a null reference error.

 

Ah yes, the prefabs array has to be initialised. This may come as a surprise, as Unity will do this for you in the case of serialised (public) arrays on MonoBehaviours.

 

Well, now i know^^