cool

Src/Unity/Scripts/UX/RadialMenu/UXRadialMenu.cs

@@ -10,6 +10,7 @@ namespace BITKit.UX
 {
 	public class UXRadialMenu : UIToolKitPanel,IUXHotKey
 	{
+		private static UXRadialMenu _singleton;
 		protected override string DocumentPath => "ui_radial_menu";
 		public override bool CloseWhenClickOutside => true;
 		public override bool AllowCursor => true;
@@ -27,6 +28,13 @@ namespace BITKit.UX
 		public UXRadialMenu(IUXService uxService) : base(uxService)
 		{
 			OnInitiatedAsync += InitiatedAsync;
+
+			if (_singleton is not null)
+			{
+				throw new InvalidOperationException($"{nameof(UXRadialMenu)} only can be one singleton");
+			}
+
+			_singleton = this;
 		}
 		
 		private async UniTask InitiatedAsync()
@@ -131,6 +139,13 @@ var button = 	container.Get<Button>();
 			}
 			UXService.Entry(this);
 		}
+
+
+		public override void Dispose()
+		{
+			base.Dispose();
+			_singleton = null;
+		}
 	}
 }