Prefab created at runtime is missing sprite reference? (original object is not)

I've started work on a very simple tile importer and have hit a bit of a snag.

I can easily create the sprites and the game objects, add sprite rendere to the game object and connect the sprite to the sprite rendere. But when I create a prefab from the game object, the reference to the sprite is lost?

Do I need to store the created sprites in some way? Or are there some parameters I must provide when creating the sprites?

Here's what I got so far.

Code (csharp):

1. public class PrefabTest : MonoBehaviour
2. {
3.     public Texture2D TilesTexture;
4.  
5.     private float TILEWIDTH = 64f;
6.     private float TILEHEIGHT = 64f;
7.  
8.     private int FRAMES_X = 16;
9.     private int FRAMES_Y = 16;
10.  
11.     private List<Sprite> spriteList;
12.  
13.     void Awake()
14.     {
15.         spriteList = new List<Sprite>();
16.         Vector2 pv = new Vector2(0f, 0f);
17.         for (int y = 0; y < FRAMES_Y; y++)
18.         {
19.             for (int x = 0; x < FRAMES_X; x++)
20.             {
21.                 Rect loc = new Rect(x * TILEWIDTH, (FRAMES_Y - (y + 1)) * TILEHEIGHT, TILEWIDTH, TILEHEIGHT);
22.                 Sprite s = Sprite.Create(TilesTexture, loc, pv, 64f);
23.                 s.name = "sprite" + (x + y * FRAMES_Y).ToString("d4");
24.                 spriteList.Add(s);
25.             }
26.         }
27.     }
28.  
29.     // Use this for initialization
30.     void Start()
31.     {
32.         for (int y = 0; y < FRAMES_Y; y++)
33.         {
34.             for (int x = 0; x < FRAMES_X; x++)
35.             {
36.                 GameObject newTile = new GameObject();
37.                 SpriteRenderer spriteRenderer = (SpriteRenderer)newTile.AddComponent<SpriteRenderer>();
38.                 spriteRenderer.sprite = spriteList[x + y * FRAMES_Y];
39.                 newTile.transform.position = new Vector3(x, -y, 0f);
40.                 newTile.name = "Tile" + (x + y * FRAMES_Y).ToString("d4");
41.                 PrefabUtility.CreatePrefab("Assets/Temporary/" + newTile.gameObject.name + ".prefab", newTile, ReplacePrefabOptions.ConnectToPrefab);
42.             }
43.         }
44.     }
45. }

All the created game objects (not the prefabs) are shown perfectly..

Any help would be appreciated.

- Henning

 

Solved.. The created sprites does not exist when the script exits. So by loading the sprites via Resources.LoadAll<Sprite>(name) the sprite objects exists, and to instantiate the prefabs from script, I found that I had to use PrefabUtility.InstantiatePrefab instead of the normal Instantiate function.

After a lot of hours searching the internet and trying out IRC #Unity3d, without success, I finally found the right combinations to make it work. I'll post the full script on http://incd021.com in the near future.

- Henning

 

Congrats on fixing it! And thanks for coming back to post the answer you found.

 

Hmmm... I have not been able to find the script on http://incd021.com.
On which page is it, please?

 

Hi Henning - I am running into the exact issue you described, but I also am having trouble finding the script on http://incd021.com. Can you provide a direct link? It would be much appreciated!

 

Never mind, found it! http://incd021.com/pyxel-edit-first-impression-and-importer/