유니티 싱글톤 제네릭 클래스

| 유니티/스크립트 2014. 9. 1. 09:31

Posted by 히아레인

출처 : http://zingweb.com/blog/2012/04/26/unity-singletons/

using UnityEngine;
using System.Collections;

/// <summary>
/// MONOBEHAVIOR PSEUDO SINGLETON ABSTRACT CLASS
/// usage    : best is to be attached to a gameobject but if not that is ok,
///      : this will create one on first access
/// example  : '''public sealed class MyClass : Singleton<MyClass> {'''
/// references   : http://tinyurl.com/d498g8c
///      : http://tinyurl.com/cc73a9h
///      : http://unifycommunity.com/wiki/index.php?title=Singleton
/// </summary>
public abstract class Singleton<T> : MonoBehaviour where T : MonoBehaviour
{
  private static T _instance = null;
          
  /// <summary>
  /// gets the instance of this Singleton
  /// use this for all instance calls:
  /// MyClass.Instance.MyMethod();
  /// or make your public methods static
  /// and have them use Instance
  /// </summary>
  public static T Instance {
      get {
          if (_instance == null) {
              _instance = (T)FindObjectOfType (typeof(T));
              if (_instance == null) {
                  
                  string goName = typeof(T).ToString ();          
                  
                  GameObject go = GameObject.Find (goName);
                  if (go == null) {
                      go = new GameObject ();
                      go.name = goName;
                  }
                  
                  _instance = go.AddComponent<T> ();                 
              }
          }
          return _instance;
      }
  }
  
  /// <summary>
  /// for garbage collection
  /// </summary>
  public virtual void OnApplicationQuit ()
  {
      // release reference on exit
      _instance = null;
  }
  
  // in your child class you can implement Awake()
  // and add any initialization code you want such as
  // DontDestroyOnLoad(go);
  // if you want this to persist across loads
  // or if you want to set a parent object with SetParent()
  
  /// <summary>
  /// parent this to another gameobject by string
  /// call from Awake if you so desire
  /// </summary>
  protected void SetParent (string parentGOName)
  {
      if (parentGOName != null) {
          GameObject parentGO = GameObject.Find (parentGOName);
          if (parentGO == null) {
              parentGO = new GameObject ();
              parentGO.name = parentGOName;
          }
          this.transform.parent = parentGO.transform;
      }
  }
}
//사용법

using UnityEngine;
using System.Collections;

public class patternTest : Singleton<patternTest> {
    public int age = 10;
}

// 불러오기

public class LoadTest: MonoBehaviour 
{
 void Start(){
   Debug.Log(patternTest.Instance.age);
 }
}

처음에는 히어라이키에서 해당 오브젝트를 찾은 다음에 해당하는 오브젝트가 없으면 게임오브젝트를 생성한후 스크립트를 붙여준다.

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