Unity Texture图集上Sprite的UV导出

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

//展示UV
public class OutTextureUV : EditorWindow
{
   
    public Texture2D mTexture;

    public List<Sprite> mSprites = new List<Sprite>();

    public string mSpritesPath = null;

    public string mSavePath = null;

    public Texture2D mOutTexture;

    Vector2 mScrollPos;
    SerializedObject mSerializedObject;
    SerializedProperty  mSerializedProperty;

    [MenuItem("WindowTools/OutTextureUV", priority = 0)]
    public static void ShowWindow() {
   
        EditorWindow.GetWindow(typeof(OutTextureUV));
    }


    private void OnGUI() {
   
        EditorGUILayout.BeginVertical();
        EditorGUILayout.LabelField("主纹理");
        mTexture = EditorGUILayout.ObjectField(mTexture, typeof(Texture2D), false) as Texture2D;

        EditorGUILayout.LabelField("Sprite子图");
        mSerializedObject = new SerializedObject(this);
        mSerializedProperty = mSerializedObject.FindProperty("mSprites");
        EditorGUILayout.PropertyField(mSerializedProperty, true);
        mSerializedObject.ApplyModifiedProperties();

        EditorGUILayout.LabelField("Sprite子图路径");
        Rect rect1 = EditorGUILayout.GetControlRect(GUILayout.Width(400));
        mSpritesPath = EditorGUI.TextField(rect1, mSpritesPath<