暂时修复单例第二次运行时出现的bug

Assets/A2WToolBox/Runtime/Singleton/SceneSingleton.cs

@@ -6,6 +6,7 @@ namespace A2W
 {
     public class SceneSingleton<T> : MonoBehaviour where T : MonoBehaviour
     {
+        [System.Obsolete]
         public static T instance
         {
             get

Assets/A2WToolBox/Runtime/Singleton/Singleton.cs

@@ -10,10 +10,10 @@ namespace A2W
         {
             get
             {
-                if (applicationIsQuitting)
-                {
-                    return null;
-                }
+                //if (applicationIsQuitting)
+                //{
+                //    return null;
+                //}
 
                 if (_instance == null)
                 {
@@ -51,12 +51,12 @@ namespace A2W
             }
         }
 
-        private static bool applicationIsQuitting = false;
+        //private static bool applicationIsQuitting = false;
 
-        public void OnDestroy()
-        {
-            applicationIsQuitting = true;
-        }
+        //public void OnDestroy()
+        //{
+        //    applicationIsQuitting = true;
+        //}
     }
 }