Preview预览窗口拓展

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
public class TestMenuItem : MonoBehaviour
{
    [MenuItem("Window/MyPreview")]
    static void MyPreview()
    {
        TestPreview testPreview= EditorWindow.GetWindow<TestPreview>("我的预览");
        testPreview.Show();
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
public class TestPreview : EditorWindow
{
    private Object obj;
    private Object lastObj;
    private Editor previewObj;
    private void OnGUI()
    {
        obj = EditorGUILayout.ObjectField(obj, typeof(Object), false);
        if(obj != null && obj != lastObj)
        {
            previewObj = Editor.CreateEditor(obj);
            lastObj = obj;
        }
        if(previewObj != null && previewObj.HasPreviewGUI())
        {
            //绘制预览信息
            previewObj.OnPreviewGUI(GUILayoutUtility.GetRect(400, 400), EditorStyles.label);
        }
    }
}