unity中通用单例模板

最新推荐文章于 2025-05-16 17:42:25 发布

原创最新推荐文章于 2025-05-16 17:42:25 发布 · 1.6k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#unity #单例

Unity3D引擎专栏收录该内容

37 篇文章

订阅专栏

Singleton<T>

using System;
using System.Reflection;
namespace LJFramework
{
    public abstract class Singleton<T> where T : Singleton<T>
    {
        private static T mInstance;
        public static T Instance
        {
            get
            {
                if (mInstance == null)
                {
                    var ctors = typeof(T).GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic);
                    var ctor = Array.Find(ctors, c => c.GetParameters().Length == 0);
                    if (ctor == null)
                    {
                        throw new Exception("Non-public ctor() not found!");
                    }
                    mInstance = ctor.Invoke(null) as T;
                }
                return mInstance;
            }
        }
        protected Singleton()
        {

        }
    }
}

SingletonExample

using UnityEngine;
namespace LJFramework
{
    public class SingletonExample : Singleton<SingletonExample>
    {
        private SingletonExample()
        {
            Debug.Log("singtleton example ctor");
        }
#if UNITY_EDITOR
        [UnityEditor.MenuItem("LJFramework/Examples/5.SingletonExample", false, 5)]
        static void MenuClicked()
        {
            var initInstance = SingletonExample.Instance;
            initInstance = SingletonExample.Instance;
        }
#endif
    }

}

MonoSingleton<T>:MonoBehaviour

using UnityEngine;

namespace LJFramework
{
    public abstract class MonoSingleton<T> : MonoBehaviour where T : MonoSingleton<T>
    {
        protected static T mInstance = null;
        public static T Instance
        {
            get
            {
                if (mInstance == null)
                {
                    mInstance = FindObjectOfType<T>();
                    if (FindObjectsOfType<T>().Length > 1)
                    {
                        Debug.LogWarning("More than 1");
                        return mInstance;
                    }
                    if (mInstance == null)
                    {
                        var instanceName = typeof(T).Name;
                        Debug.LogFormat("Instance Name: {0}", instanceName);
                        var instanceObj = GameObject.Find(instanceName);
                        if (!instanceObj)
                            instanceObj = new GameObject(instanceName);
                        mInstance = instanceObj.AddComponent<T>();
                        DontDestroyOnLoad(instanceObj); //保证实例例不不会被释放

                        Debug.LogFormat("Add New Singleton {0} in Game!",
                        instanceName);
                    }
                    else
                    {
                        Debug.LogFormat("Already exist: {0}", mInstance.name);
                    }
                }
                return mInstance;
            }
        }
        protected virtual void OnDestroy()
        {
            mInstance = null;
        }
    }
}

MonoSingletonExample

using UnityEngine;
namespace LJFramework
{
    public class MonoSingletonExample : MonoSingleton<MonoSingletonExample>
    {

#if UNITY_EDITOR
        [UnityEditor.MenuItem("LJFramework/Examples/6.MonoSingletonExample",
        false, 6)]
        private static void MenuClicked()
        {
            UnityEditor.EditorApplication.isPlaying = true;

        }
#endif
        [RuntimeInitializeOnLoadMethod]
        private static void Example()
        {
            var initInstance = MonoSingletonExample.Instance;
            initInstance = MonoSingletonExample.Instance;
        }
    }
}