增加了基础工具包

Packages/Tools/Runtime/Single/Single.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace MuHua {
+	/// <summary>
+	/// 单例基类
+	/// </summary>
+	public class Single<T> where T : Single<T>, new() {
+		/// <summary> 模块单例 </summary>
+		public static T I => Instantiate();
+
+		protected static T instance;
+		protected static T Instantiate() => instance == null ? instance = new T() : instance;
+	}
+}

Packages/Tools/Runtime/Single/Single.cs.meta

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Packages/Tools/Runtime/Single/SingleBehaviour.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace MuHua {
+	/// <summary>
+	/// 单例行为
+	/// </summary>
+	public abstract class SingleBehaviour<T> : MonoBehaviour where T : SingleBehaviour<T> {
+		/// <summary> 模块单例 </summary>
+		public static T I => instance;
+		/// <summary> 模块单例 </summary>
+		protected static T instance;
+		/// <summary> 初始化 </summary>
+		protected abstract void Awake();
+
+		/// <summary> 替换，并且设置切换场景不销毁 </summary>
+		protected virtual void Replace(bool isDontDestroy = true) {
+			if (instance != null) { Destroy(instance.gameObject); }
+			instance = (T)this;
+			if (isDontDestroy) { DontDestroyOnLoad(gameObject); }
+		}
+		/// <summary> 不替换，并且设置切换场景不销毁 </summary>
+		protected virtual void NoReplace(bool isDontDestroy = true) {
+			if (isDontDestroy) { DontDestroyOnLoad(gameObject); }
+			if (instance == null) { instance = (T)this; }
+			else { Destroy(gameObject); }
+		}
+	}
+}

Packages/Tools/Runtime/Single/SingleBehaviour.cs.meta

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