通用单例类

Posted 2022-08-01 z-59-46

普通单例类设计：

public abstract class Singleton<T> where T : new()

    private static T _instance;
    private static object _lock = new object();

    public static T instance
    
        get
        
            if (_instance == null)
            
                object lockObject = Singleton<T>._lock;
                Monitor.Enter(lockObject);
                try
                
                    if (_instance == null)
                        _instance = Activator.CreateInstance<T>();
                
                finally
                
                    Monitor.Exit(lockObject);
                
            
            return _instance;
        
    

    //public virtual void Init()
    //

    //

 

MomoBehavior类的设计：

 

public abstract class MonoSingleton<T> : MonoBehaviour where T : MonoSingleton<T>

    private static T instance = null;
    private static object lockObject = new object();

    public static T Instance
    
        get
        
            if (instance == null)
            
                object obj = MonoSingleton<T>.lockObject;
                Monitor.Enter(obj);
                instance = GameObject.FindObjectOfType(typeof(T)) as T;
                if (instance == null)
                
                    instance = new GameObject(typeof(T).Name, typeof(T)).GetComponent<T>();
                
                Monitor.Exit(obj);
            
            return instance;
        
    

    public virtual void SetDontDestroyOnLoad(Transform parent)
    
        transform.parent = parent;