38 lines
1.3 KiB
C#
38 lines
1.3 KiB
C#
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using System;
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namespace UIFrame
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{
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public abstract class Singleton<T> where T : class
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{
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private static T? _instance;
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private static readonly object _lock = new object(); // 用于多线程安全
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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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// 在多线程环境下，确保只有一个线程能够创建实例
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lock (_lock)
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{
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if (_instance == null)
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{
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_instance = Activator.CreateInstance(typeof(T), true) as T;
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if (_instance == null)
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{
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throw new InvalidOperationException($"无法为类型 {typeof(T).Name} 创建单例实例。" +
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"请确保它有一个私有的无参构造函数。");
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}
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}
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return _instance;
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}
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}
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}
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protected Singleton()
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{
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if (_instance != null)
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{
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throw new InvalidOperationException($"试图创建第二个单例实例 {typeof(T).Name}。请通过 Singleton<{typeof(T).Name}>.Instance 访问。");
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}
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}
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}
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}
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