Unity项目中查找所有使用某一张图片的材质球，再查找所有使用材质球的预设

废话少说，直接上代码。

using UnityEditor;
using UnityEngine;

public class FindDependencies : MonoBehaviour
{
    static bool m_bIsSaveFile = false;
    static TextWriteHelper m_szMaterialList = new TextWriteHelper();
    static TextWriteHelper m_szPrefabList = new TextWriteHelper();
    [MenuItem("Assets/FindImageDependencies")]
    static void FindDepend()
    {
        m_szMaterialList.ClearData();
        string imagePath = GetObjPath(); // "Assets/Path/To/Your/Image.png";
        string[] guids = AssetDatabase.FindAssets("t:Material");
        foreach (string guid in guids)
        {
            string assetPath = AssetDatabase.GUIDToAssetPath(guid);
            Material material = AssetDatabase.LoadAssetAtPath(assetPath);

            if (material != null && HasTexture(material, imagePath))
            {
                Debug.Log(string.Format("Material referencing the image: {0}， and path = {1}", material.name, assetPath));
                //m_szMaterialList.AddContent(string.Format("Material referencing the image: {0}， and path = {1}", material.name, assetPath));
                FindPrefab(assetPath);
            }
        }
        if (m_bIsSaveFile)
        {
            m_szMaterialList.SaveFile("MaterialReferenceList");
            m_szPrefabList.SaveFile("PrefabReferenceList");
        }
    }
    static string GetObjPath()
    {
        string path = AssetDatabase.GetAssetPath(Selection.activeInstanceID);
        return path;
    }
    static bool HasTexture(Material material, string texturePath)
    {
        SerializedObject serializedMaterial = new SerializedObject(material);
        SerializedProperty texturesProperty = serializedMaterial.FindProperty("m_SavedProperties.m_TexEnvs");

        for (int i = 0; i < texturesProperty.arraySize; i++)
        {
            SerializedProperty textureProperty = texturesProperty.GetArrayElementAtIndex(i);
            SerializedProperty textureValueProperty = textureProperty.FindPropertyRelative("second.m_Texture");

            if (textureValueProperty != null)
            {
                Texture texture = textureValueProperty.objectReferenceValue as Texture;
                if (texture != null && AssetDatabase.GetAssetPath(texture) == texturePath)
                {
                    return true;
                }
            }
        }
        return false;
    }

    static void FindPrefab(string materialPath)
    {
        //string materialPath = "Assets/Path/To/Your/Material.mat";
        string[] guids = AssetDatabase.FindAssets("t:Prefab");
        foreach (string guid in guids)
        {
            string assetPath = AssetDatabase.GUIDToAssetPath(guid);
            GameObject prefab = AssetDatabase.LoadAssetAtPath(assetPath);

            if (prefab != null && HasMaterialReference(prefab, materialPath))
            {
                Debug.Log(string.Format("Prefab referencing the material: {0}，and prefab path ={1} ", prefab.name, assetPath));
                //m_szPrefabList.AddContent(string.Format("Prefab referencing the material: {0}，and prefab path ={1} ", prefab.name, assetPath));
            }
        }
    }

    static bool HasMaterialReference(GameObject gameObject, string materialPath)
    {
        Renderer[] renderers = gameObject.GetComponentsInChildren(true);

        foreach (Renderer renderer in renderers)
        {
            foreach (Material material in renderer.sharedMaterials)
            {
                if (material != null && AssetDatabase.GetAssetPath(material) == materialPath)
                {
                    return true;
                }
            }
        }

        return false;
    }
}

上述代码中，我们首先使用AssetDatabase.FindAssets方法通过过滤类型（"t:Material"）获取所有材质球的GUID。然后遍历每个GUID，加载对应的材质球，判断该材质球是否引用了指定的图片。我们定义了一个辅助方法HasTexture来检查材质球中的纹理是否引用了目标图片，通过检查SerializedProperty来判断纹理是否匹配。

上述代码中，我们首先使用AssetDatabase.FindAssets方法通过过滤类型（"t:Prefab"）获取所有预设的GUID。然后遍历每个GUID，加载对应的预设，并判断该预设是否引用了指定的材质球。我们定义了一个辅助方法HasMaterialReference来检查预设及其子物体的渲染组件是否使用了目标材质球，通过遍历渲染组件的sharedMaterials数组来进行匹配。

综上所诉，我们也可以通过相似的方式去查找其他类型的资源引用。好了大功告成。。。