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Assets/Scenes/Ride/Scripts/MonoSingleton.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnityEngine;
+
+namespace Assets.Scenes.Ride.Scripts
+{
+    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;
+        }
+    }
+}