ManlySingleton.cs

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using UnityEngine;
 
public class ManlySingleton<T> : SingletonBase where T : MonoBehaviour
{
    private static T myInstance;
 
    public static T Instance
    {
        get
        {
            if (myInstance == null)
            {
                Object[] array = Object.FindObjectsOfType(typeof(T));
                if (array.Length > 1)
                {
                    Debug.LogError("<B>Doubleton?</B> Do you really want two instances of <B><i>" + typeof(T).Name + "</i></B>?\n", array[1]);
                }
                if (array.Length >= 1)
                {
                    myInstance = (T)array[0];
                }
                if (myInstance == null)
                {
                    Debug.LogError("An instance of " + typeof(T).Name + " could not be found. Add it to the scene.");
                }
            }
            return myInstance;
        }
    }
 
    public static T InstanceOrNull => myInstance ?? (myInstance = (T)Object.FindObjectOfType(typeof(T)));
 
    public static Transform STransform => Instance.transform;
 
    public static Vector3 SPosition
    {
        get
        {
            return Instance.transform.position;
        }
        set
        {
            Instance.transform.position = value;
        }
    }
 
    public static GameObject SGameObject => Instance.gameObject;
 
    public static bool Exists()
    {
        return InstanceOrNull != null;
    }
 
    public override void Elect()
    {
        myInstance = this as T;
    }
 
    protected void Abdicate()
    {
        if (myInstance == this)
        {
            myInstance = null;
        }
    }
 
    protected virtual void OnDestroy()
    {
        myInstance = null;
    }
}