93 lines
2.7 KiB
C#
93 lines
2.7 KiB
C#
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////////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2007-2020 , Inc. All Rights Reserved.
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//
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////////////////////////////////////////////////////////////////////////////////
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using UnityEngine;
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namespace GCSeries.Core.Utility
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{
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[DisallowMultipleComponent]
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public class ZSingleton<T> : MonoBehaviour where T : MonoBehaviour
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{
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////////////////////////////////////////////////////////////////////////
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// MonoBehaviour Callbacks
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////////////////////////////////////////////////////////////////////////
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protected virtual void Awake()
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{
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if (s_instance != null && s_instance != this)
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{
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Debug.LogWarning(
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$"Additional instance of {this.GetType()} found on " +
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$"GameObject: {this.name}. Destroying this instance to " +
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"ensure that only one instance is active.",
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this);
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// Since an instance already exists, destroy this instance.
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if (Application.isEditor)
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{
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DestroyImmediate(this.gameObject);
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}
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else
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{
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Destroy(this.gameObject);
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}
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}
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if (s_instance == null)
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{
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s_instance = this as T;
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}
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}
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protected virtual void OnDestroy()
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{
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if (s_instance == this)
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{
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s_instance = null;
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}
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}
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protected virtual void OnApplicationQuit()
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{
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if (s_instance == this)
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{
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s_instance = null;
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Public Static Properties
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////////////////////////////////////////////////////////////////////////
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/// <summary>
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/// Gets a reference to the singleton instance.
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/// </summary>
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///
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/// <remarks>
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/// If a valid reference to the singleton instance has not been
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/// cached, lazily search the Unity scene for a valid instance.
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/// </remarks>
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public static T Instance
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{
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get
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{
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if (s_instance == null)
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{
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s_instance = FindObjectOfType<T>();
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}
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return s_instance;
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Private Static Members
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////////////////////////////////////////////////////////////////////////
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private static T s_instance = null;
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}
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}
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