シーン名とシーン番号を定数で管理するクラスを作成しつつシーン名とシーン番号を関連付けたSceneDataを書き出すスクリプト【Unity】

1SceneDataClassCreator.cs

using System;
using System.IO;
using System.Text;
using UnityEditor;
using UnityEditorInternal;
using UnityEngine;
using System.Collections.Generic;
using System.Linq;

/// <summary>
/// シーン名とシーン番号を定数で管理するクラスを作成しつつシーン名とシーン番号を関連付けたSceneDataを書き出すスクリプト
/// </summary>
public class SceneDataClassCreator : AssetPostprocessor{

  private const string COMMAND_NAME = "Tools/Create/Scene Data"; // コマンド名

  //スクリプトを作成します
  [MenuItem(COMMAND_NAME)]
  private static void Create()
  {
    Dictionary<string, string> scenesNameDic = new Dictionary<string, string>();
    Dictionary<string, int>    scenesNoDic   = new Dictionary<string, int>();

    for(int i = 0; i < EditorBuildSettings.scenes.Count(); i++){
      string sceneName = Path.GetFileNameWithoutExtension (EditorBuildSettings.scenes [i].path);
      scenesNameDic [sceneName] = sceneName;
      scenesNoDic   [sceneName] = i;
    }

    CreateSceneData (scenesNoDic);

    ConstantsClassCreator.Create ("SceneName", "シーン名を定数で管理するクラス",  scenesNameDic);
    ConstantsClassCreator.Create ("SceneNo"  , "シーン番号を定数で管理するクラス", scenesNoDic);
  }


  //シーン名とシーン番号を関連付けたSceneDataを書き出す
  private static void CreateSceneData(Dictionary<string, int> scenesNoDic){

    //"Assets/Resources/" + "SceneData" + ".asset"
    string dataPath = DirectoryPath.RESOURCES + FilePath.SCENE_DATA + Extension.ASSET;

    //SceneDataを新規作成、既にあるものは削除
    SceneData data = ScriptableObject.CreateInstance<SceneData> ();
    AssetDatabase.DeleteAsset (dataPath);
    AssetDatabase.CreateAsset ((ScriptableObject)data, dataPath);

    data.hideFlags = HideFlags.NotEditable;

    foreach (KeyValuePair<string, int> valuePair in scenesNoDic) {

      SceneData.Param param = new SceneData.Param ();
      param.Name = valuePair.Key;
      param.No   = valuePair.Value;

      data.list.Add (param);
    }

    //変更を反映
    ScriptableObject obj = AssetDatabase.LoadAssetAtPath (dataPath, typeof(ScriptableObject)) as ScriptableObject;
    EditorUtility.SetDirty (obj);

  }

}

2SceneData.cs

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

public class SceneData : ScriptableObject
{
  public List<Param> list = new List<Param> ();

  [System.SerializableAttribute]
  public class Param
  {
    public int No;
    public string Name;
  }

}

3SceneManager.cs

using UnityEngine;
using System.Collections;

public class SceneManager : SingletonMonoBehaviour<SceneManager> {

  /* 諸々省略 */

  //シーン名と番号が紐づいたデータ
  private SceneData _sceneData;

  //=================================================================================
  //初期化
  //=================================================================================

  private void Awake (){
    if (this != Instance) {
      Destroy (this);
      return;
    }
    DontDestroyOnLoad (gameObject);

    //シーン情報読み込み
    _sceneData = Resources.Load<SceneData> (FilePath.SCENE_DATA); 

  }


　/* 諸々省略 */


  //=================================================================================
  //シーン番号と名前の変換
  //=================================================================================

  /// <summary>
  /// シーンの数を取得
  /// </summary>
  public int GetSceneNum(){
    return _sceneData.list.Count;
  }

  /// <summary>
  /// シーン名を入力して、シーンの番号を取得
  /// </summary>
  public string SceneNoToSceneName(int SceneNo){
    string SceneName = "";

    for(int i = 0; i < _sceneData.list.Count; i++){

      if(_sceneData.list[i].No == SceneNo){
        SceneName = _sceneData.list [i].Name;
        break;
      }

    }

    return SceneName;
  }

  /// <summary>
  /// シーン番号を入力して、シーン名を取得
  /// </summary>
  public int SceneNameToSceneNo(string SceneName){
    int SceneNo = 0;

    for(int i = 0; i < _sceneData.list.Count; i++){

      if(_sceneData.list[i].Name == SceneName){
        SceneNo = _sceneData.list [i].No;
        break;
      }

    }

    return SceneNo;
  }



}