Why does indexing of sprite-multiple object members begin with 1 instead of 0?

I have this sprite sheet split in 20 cells in the Sprite Editor.
If I do

stripIcons = Resources.LoadAll("spriteStrip");
iconSprite = stripIcons[0];
print(iconSprite);

I get the "InvalidCastException: Cannot cast from source type to destination type." error.

If I do instead

stripIcons = Resources.LoadAll("spriteStrip");
iconSprite = stripIcons[1];
print(iconSprite);

It prints out :

spriteStrip_0 (UnityEngine.Sprite)

and all is fine.

I can access all the members of the sprite sheet, from 1 to 20 instead of the 0-19 I would have expected.
What is it I don't get about sprite-multiple objects indexing?

 

Code (csharp):

1. function Start () {
2.     var stripIcons = Resources.LoadAll("SpriteStrip");
3.     var iconTexture = stripIcons[0];
4.     print(typeof(iconTexture));
5.     var iconSprite = stripIcons[1];
6.     print(typeof(iconSprite));
7. }

--Eric

 

Thanx.
So the first element in that object is a texture and the rest are sprites?!
Can you point me where in the doc I can have a look at this strange object?
I can't figure at what point what becomes an array...

 

Yes, the first entry is the texture, the rest are sprites. You can't have sprites without a texture. It's not defined anywhere that the first entry is always the texture, though, so it might be best not to take that for granted.

--Eric

 

In order to disambiguate this, load the resources with a type:

Code (CSharp):

1. stripIcons = Resources.LoadAll<Sprite>("spriteStrip");
2.  
3. iconSprite = stripIcons[0];