unity 打开文件夹获取选择的文件名称和后缀名

你可以使用 `EditorUtility.OpenFilePanel` 方法打开一个文件选择对话框，然后从返回的路径中获取文件名和后缀名。以下是一个示例代码：

using UnityEngine;
using UnityEditor;
using System.IO;

public class OpenFileDialog : EditorWindow
{
    string filePath = "";
    string fileName = "";
    string fileExtension = "";

    [MenuItem("Tools/Open File Dialog")]
    static void Init()
    {
        OpenFileDialog window = (OpenFileDialog)EditorWindow.GetWindow(typeof(OpenFileDialog));
        window.Show();
    }

    void OnGUI()
    {
        GUILayout.Label("Selected File Path: " + filePath);
        GUILayout.Label("Selected File Name: " + fileName);
        GUILayout.Label("Selected File Extension: " + fileExtension);

        if (GUILayout.Button("Open File Dialog"))
        {
            filePath = EditorUtility.OpenFilePanel("Select File", "", "");
            if (filePath.Length > 0)
            {
                fileName = Path.GetFileNameWithoutExtension(filePath);
                fileExtension = Path.GetExtension(filePath);
            }
        }
    }
}

在 Unity 编辑器中，选择 `Tools/Open File Dialog` 菜单项，将打开一个窗口，在窗口中点击 `Open File Dialog` 按钮，将弹出文件选择对话框。选择一个文件后，窗口中将显示所选文件的路径、文件名和文件扩展名。