131 lines
3.7 KiB
C#
131 lines
3.7 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace AlicizaX
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{
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/// <summary>
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/// 所有单例的统一管理器。
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/// </summary>
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[DefaultExecutionOrder(-9999)]
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public sealed class SingletonManager : MonoBehaviour
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{
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private static SingletonManager _instance;
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private readonly Dictionary<Type, Component> _singletons = new();
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public static SingletonManager Instance
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{
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get
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{
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if (_instance == null)
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{
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// 查找是否已有实例
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_instance = FindFirstObjectByType<SingletonManager>();
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if (_instance == null)
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{
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var obj = new GameObject("[SingletonManagers]");
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_instance = obj.AddComponent<SingletonManager>();
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DontDestroyOnLoad(obj);
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}
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}
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return _instance;
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}
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}
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/// <summary>
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/// 注册一个单例。
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/// </summary>
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internal void Register<T>(T instance) where T : Component
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{
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var type = typeof(T);
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if (!_singletons.ContainsKey(type))
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{
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_singletons[type] = instance;
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instance.transform.SetParent(transform, false);
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}
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}
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/// <summary>
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/// 注销单例。
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/// </summary>
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internal void Unregister<T>(T instance) where T : Component
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{
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var type = typeof(T);
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if (_singletons.TryGetValue(type, out var current) && current == instance)
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_singletons.Remove(type);
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}
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/// <summary>
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/// 获取一个已注册的单例（若不存在则返回 null）
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/// </summary>
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public T Get<T>() where T : Component
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{
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_singletons.TryGetValue(typeof(T), out var result);
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return result as T;
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}
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}
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/// <summary>
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/// 泛型单例基类。
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/// 自动注册到 SingletonManager。
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/// 支持动态创建与销毁。
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/// </summary>
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public abstract class Singleton<T> : MonoBehaviour where T : Component
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{
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private static T _instance;
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private static readonly object _lock = new();
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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 (_instance != null) return _instance;
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lock (_lock)
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{
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if (_instance != null) return _instance;
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// 检查 SingletonManager 是否存在
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var manager = SingletonManager.Instance;
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// 查找场景中是否已经存在该类型
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_instance = manager.Get<T>();
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if (_instance == null)
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{
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var obj = new GameObject(typeof(T).Name);
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_instance = obj.AddComponent<T>();
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manager.Register(_instance);
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}
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return _instance;
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}
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}
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}
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protected virtual void Awake()
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{
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if (_instance == null)
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{
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_instance = this as T;
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SingletonManager.Instance.Register(_instance);
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}
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else if (_instance != this)
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{
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Destroy(gameObject);
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return;
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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 (_instance == this)
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{
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SingletonManager.Instance.Unregister(this as T);
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_instance = null;
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}
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}
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}
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}
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