How to programmatically change sprite sheet sub-sprite name

Question

I am trying to change the name of the sub-sprites of a sprite sheet. I have searched and tried everything I can think of and cannot get it to work, which makes me think it can't be done at this point in time.

Let's say I have a sprite sheet that has already been split up into individual sprites inside of Unity.

I am attempting to change the sub-sprite names programmatically.

I tried using

AssetDatabase.RenameAsset (...)

on the sprite sheet asset, which only changes the sprite sheet name and not sub-sprites.

I then thought to obtain a sub-sprite and attempt to change its name using the below code.

            if (AssetDatabase.IsSubAsset (subSprite))
            {
                AssetDatabase.RenameAsset (AssetDatabase.GetAssetPath (subSprite), "newSprite" + i.ToString ());
            }

However, this too only changes the sprite sheet name.

I'm not sure where else I can take this to achieve my desired outcome, apart from programmatically copying the original sprite sheet and using that to create a copy. But even then, I still am unable to alter the sub-sprite names.

I also tried changing subSprite.name, but this just changes the internal name and not the asset name.

Any ideas?

Answer 1

Ok so based on @Rouze comment regarding the sprite slice renamer, I've managed to mock something up quickly that does the job.

Here is the quick mockup I did if anyone else is looking for a quick and dirty way to change the subsprite names. In my research for this subject, it appears I was referring to them as Sub-Sprites when the more known name is Sprite Slices... Probably why I couldn't find anything on this subject.

using UnityEngine;
using UnityEditor;
using System.Collections;

public class SubSpriteRenamer : MonoBehaviour 
{
    public Texture2D texture2D;
    public string newName;

    private string path;
    private TextureImporter textureImporter;

    void Start () 
    {
        path = AssetDatabase.GetAssetPath (texture2D);
        textureImporter = AssetImporter.GetAtPath (path) as TextureImporter;
        SpriteMetaData[] sliceMetaData = textureImporter.spritesheet;

        int index = 0;
        foreach (SpriteMetaData individualSliceData in sliceMetaData)
        {
            sliceMetaData[index].name = string.Format (newName + "_{0}", index);
            print (sliceMetaData[index].name);

            index++;
        }

        textureImporter.spritesheet = sliceMetaData;
        EditorUtility.SetDirty (textureImporter);
        textureImporter.SaveAndReimport ();

        AssetDatabase.ImportAsset (path, ImportAssetOptions.ForceUpdate);
    }

    void Update () 
    {

    }
}

Answer 2

I had the same problem - a quick fix is to open the meta file in a good editor and do a find / replace on the name fragment. In my case I needed AbilityIcon_0X changed to UpgradeNodeIcon_0X. So I did these steps:

• Find "AbilityIcon_"
• Replace all with "UpgradeNodeIcon_".

A scripted solution if there is a batch is always great. If you just need to do a handful this might be easiest

Answer 3

I found this sprite slice renamer online. It's the closest thing I could find but the source is provided and might be of some use.