8.0AssetPostprocessor控制资源导入管线

AssetPostprocessor脚本需要继承自AssetPostprocessor类。如下：

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

public class AssetImportPipeline : AssetPostprocessor
{
    //导入模型资源之前调用
    private void OnPreprocessModel()
    {
    }
    //导入模型资源之后调用
    private void OnPostprocessModel(GameObject g)
    {
    }
    //导入任意资源之前调用
    private void OnPreprocessAsset()
    {
    }
    //导入任意资源之后调用
    private static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets,
        string[] movedFromAssetPaths)
    {
    }
    //还有animation，audio等资源的ProcessAsset方法，这里不一一列举了，下面以Texture为例
    //导入图片资源之前调用
    private void OnPreprocessTexture()
    {
        if (assetPath.StartsWith("Assets/Art/Bg"))
        {
            PreprocessBg();
        }
    }
    //导入图片资源之后调用
    private void OnPostprocessTexture(Texture2D texture)
    {
        //输出路径
        Debug.Log(assetPath);
    }
    private void PreprocessBg()
    {
        TextureImporter importer = assetImporter as TextureImporter;
        if (importer != null)
        {
            //设置贴图类型为Spite
            importer.textureType = TextureImporterType.Sprite;
            TextureImporterSettings texSettings = new TextureImporterSettings();
            importer.ReadTextureSettings(texSettings);
            //设置精灵的pivot
            texSettings.spriteAlignment = (int)SpriteAlignment.BottomLeft;
            //不开启mipmap
            texSettings.mipmapEnabled = false;
            importer.SetTextureSettings(texSettings);
        }
    }
}

AssetPostprocessor脚本在使用时，最好做成dll链接库，避免资源导入时，因为其他脚本编译错误，而导致AssetPostprocessor脚本不运行，dll链接库制作请自行百度。