Unity通用泛型单例设计模式(普通型和继承自MonoBehaviour)
单例模式是设计模式中最为常见的,不多解释了。但应该尽量避免使用,一般全局管理类才使用单例。
普通泛型单例:
public abstract class Singleton<T> where T : class, new() { private static T instance = null; private static readonly object locker = new object(); public static T Instance { get { lock (locker) { if (instance == null) instance = new T(); return instance; } } } }
继承MonoBehaviour的泛型单例:
using UnityEngine; public abstract class MonoSingleton <T>: MonoBehaviour where T:MonoBehaviour { private static T instance = null; private static readonly object locker = new object(); private static bool bAppQuitting; public static T Instance { get { if (bAppQuitting) { instance = null; return instance; } lock (locker) { if (instance == null) { instance = FindObjectOfType<T>(); if (FindObjectsOfType<T>().Length > 1) { Debug.LogError("不应该存在多个单例!"); return instance; } if (instance == null) { var singleton = new GameObject(); instance = singleton.AddComponent<T>(); singleton.name = "(singleton)" + typeof(T); singleton.hideFlags = HideFlags.None; DontDestroyOnLoad(singleton); } else DontDestroyOnLoad(instance.gameObject); } instance.hideFlags = HideFlags.None; return instance; } } } private void Awake() { bAppQuitting = false; } private void OnDestroy() { bAppQuitting = true; } }
使用方法直接用类去继承这两个抽象单例即可,使用T.Instance就可以直接取得该类(T)的唯一实例了。
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