AssetDatabase文档翻译
2024-09-05 21:54:34
AssetDatabase是一个能获取工程资源的API，它提供一些方法比如：查找、加载、创建、删除和修改。Unity需要了解工程文件夹里的所有改变，假如想要获取或修改资源文件，就使用 AssetDatabase的API而不是文件IO流。
导入资源
Unity导入资源通常是用鼠标手动拖动到工程面板里，但是也可能需要脚本控制资源的导入，为了使用脚本导入可以使用AssetDatabase.ImportAsset方法，比如：
using UnityEngine;
using UnityEditor;
public class ImportAsset {
[MenuItem ("AssetDatabase/ImportExample")]
static void ImportExample ()
{
AssetDatabase.ImportAsset("Assets/Textures/texture.jpg", ImportAssetOptions.Default);
}
}
加载资源
加载资源可以用这些方法：AssetDatabase.LoadAssetAtPath, AssetDatabase.LoadMainAssetAtPath, AssetDatabase.LoadAllAssetRepresentationsAtPath 和AssetDatabase.LoadAllAssetsAtPath.
using UnityEngine;
using UnityEditor;
public class ImportAsset {
[MenuItem ("AssetDatabase/LoadAssetExample")]
static void ImportExample ()
{
Texture2D t = AssetDatabase.LoadAssetAtPath("Assets/Textures/texture.jpg", typeof(Texture2D)) as Texture2D;
}
}
用AssetDatabase做文件操作
由于unity采用元数据的文件方式，你需要对文件做创建、移动或者删除操作，可以用以下这些方法替代操作： AssetDatabase.Contains,AssetDatabase.CreateAsset, AssetDatabase.CreateFolder, AssetDatabase.RenameAsset, AssetDatabase.CopyAsset, AssetDatabase.MoveAsset,AssetDatabase.MoveAssetToTrash and AssetDatabase.DeleteAsset.
public class AssetDatabaseIOExample {
[MenuItem ("AssetDatabase/FileOperationsExample")]
static void Example ()
{
string ret;
// Create
Material material = new Material (Shader.Find("Specular"));
AssetDatabase.CreateAsset(material, "Assets/MyMaterial.mat");
if(AssetDatabase.Contains(material))
Debug.Log("Material asset created");
// Rename
ret = AssetDatabase.RenameAsset("Assets/MyMaterial.mat", "MyMaterialNew");
if(ret == "")
Debug.Log("Material asset renamed to MyMaterialNew");
else
Debug.Log(ret);
// Create a Folder
ret = AssetDatabase.CreateFolder("Assets", "NewFolder");
if(AssetDatabase.GUIDToAssetPath(ret) != "")
Debug.Log("Folder asset created");
else
Debug.Log("Couldn't find the GUID for the path");
// Move
ret = AssetDatabase.MoveAsset(AssetDatabase.GetAssetPath(material), "Assets/NewFolder/MyMaterialNew.mat");
if(ret == "")
Debug.Log("Material asset moved to NewFolder/MyMaterialNew.mat");
else
Debug.Log(ret);
// Copy
if(AssetDatabase.CopyAsset(AssetDatabase.GetAssetPath(material), "Assets/MyMaterialNew.mat"))
Debug.Log("Material asset copied as Assets/MyMaterialNew.mat");
else
Debug.Log("Couldn't copy the material");
// Manually refresh the Database to inform of a change
AssetDatabase.Refresh();
Material MaterialCopy = AssetDatabase.LoadAssetAtPath("Assets/MyMaterialNew.mat", typeof(Material)) as Material;
// Move to Trash
if(AssetDatabase.MoveAssetToTrash(AssetDatabase.GetAssetPath(MaterialCopy)))
Debug.Log("MaterialCopy asset moved to trash");
// Delete
if(AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(material)))
Debug.Log("Material asset deleted");
if(AssetDatabase.DeleteAsset("Assets/NewFolder"))
Debug.Log("NewFolder deleted");
// Refresh the AssetDatabase after all the changes
AssetDatabase.Refresh();
}
}
当你完成资源的修改后，应该调用AssetDatabase.Refresh方法来确认你的改变。
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