[游戏开发]U3D Editor模式批量修改Sprite导入参数

Sprite的导入参数是无法在运行时修改的，如果要批量导入或者批量修改成特定格式，一张一张图片修改肯定会很慢。

Unity3D允许用C#扩展编辑器功能，可以很方便的执行批量导入和修改。

编辑器扩展代码放在Asserts/Editor目录下，一个cs脚本可以写多个编辑器扩展，每个扩展函数必须是static，通过[MenuItem(“Tools/auto SpriteSet &c”)]注释菜单路径，Unity3D编辑器会在对应位置增加扩展菜单，点击菜单即可执行对应的编辑器扩展函数
如

[MenuItem("Tools/auto SpriteSet &c")]
static void BatchSpriteSet()
{
  //...
}

以下代码批量设置Sprite为可读写、非压缩格式，用于运行时读取Sprite文件。

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

public class MySpriteSet : Editor
{
  // 批量设置选中Sprite导入属性
  [MenuItem("Assets/MyEditor/SpriteSet &c")]
  static void SpriteSet()
  {
    if (Selection.objects.Length > 0)
    {
      foreach (Texture texture in Selection.objects)
      {
        string selectionPath = AssetDatabase.GetAssetPath(texture);
        TextureImporter textureIm = AssetImporter.GetAtPath(selectionPath) as TextureImporter;

        textureIm.textureType = TextureImporterType.Sprite;
        textureIm.spriteImportMode = SpriteImportMode.Single;
        textureIm.isReadable = true;
        var setting = textureIm.GetDefaultPlatformTextureSettings();
        setting.format = TextureImporterFormat.RGBA32;
        textureIm.SetPlatformTextureSettings(setting);

        AssetDatabase.ImportAsset(selectionPath);
      }
    }
  }
  // 批量设置选中目录下所有Sprite导入属性
  [MenuItem("Assets/MyEditor/batch SpriteSet &c")]
  static void FolderSpriteSet()
  {
    List<string> paths = new List<string>();
    foreach (Object obj in Selection.objects)
    {
      string selectionPath = AssetDatabase.GetAssetPath(obj);
      paths.Add(selectionPath);
    }
    string[] allPath = AssetDatabase.FindAssets("t:Sprite", paths.ToArray());
    EditorApplication.update = delegate ()
    {
      for (int i = 0; i < allPath.Length; i++)
      {
        string path = AssetDatabase.GUIDToAssetPath(allPath[i]);
        bool isCancel = EditorUtility.DisplayCancelableProgressBar("执行中...", path, (float)i / allPath.Length);
        if (isCancel)
        {
          break;
        }
        TextureImporter textureIm = AssetImporter.GetAtPath(path) as TextureImporter;
        if (null != textureIm)
        {
          textureIm.textureType = TextureImporterType.Sprite;
          textureIm.spriteImportMode = SpriteImportMode.Single;
          textureIm.isReadable = true;
          var setting = textureIm.GetDefaultPlatformTextureSettings();
          setting.format = TextureImporterFormat.RGBA32;
          textureIm.SetPlatformTextureSettings(setting);

          AssetDatabase.ImportAsset(path);
        }
      }
      EditorUtility.ClearProgressBar();
      EditorApplication.update = null;
    };
  }
}

批量执行结果

批量设置后的导入参数