Unity逻辑代码开发介绍_单例示例

下面是一种Unity单例工具类的写法，加了线程锁和C#模板特性，比较方便，可以直接拿来使用。

namespace LoveNineOneNine.Utility
{
    public class Singleton<T> : MonoBehaviour where T : MonoBehaviour
    {
        private static T _instance;
        private static object _lock = new object();

        public static T Instance
        {
            get
        {
            if (applicationIsQuitting) {
                return null;
            }
 
            lock(_lock)
            {
                if (_instance == null)
                {
                    _instance = (T) FindObjectOfType(typeof(T));
 
                    if ( FindObjectsOfType(typeof(T)).Length > 1 )
                    {
                        return _instance;
                    }
 
                    if (_instance == null)
                    {
                        GameObject singleton = new GameObject();
                        _instance = singleton.AddComponent<T>();
                        singleton.name = "(Singleton) "+ typeof(T).ToString();
                        DontDestroyOnLoad(singleton);
                    }
                }
 
                return _instance;
            }
        }
        }

        private static bool applicationIsQuitting = false;
        public void OnDestroy()
        {
            applicationIsQuitting = true;
        }
    }
}

 

 

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