结构大修改，改成朴实无华的结构，不过度架构。能跑就行

Assets/Scripts/UI/Common/Panel/CommonTopPanel.cs

@@ -15,7 +15,7 @@ namespace NBF
 
         protected override void OnShow()
         {
-            Game.Input.OnUICanceled += OnUICanceled;
+            InputManager.OnUICanceled += OnUICanceled;
         }
 
         protected override void OnUpdate()
@@ -31,13 +31,13 @@ namespace NBF
         {
             if (action == InputDef.UI.Back)
             {
-                var uis = App.UI.GetAllUI();
+                var uis = UI.Inst.GetAllUI();
                 foreach (var ui in uis)
                 {
                     if (ui.ContentPane.sortingOrder > 0) continue;
                     if (ui.IsTop && !ui.IsDontBack)
                     {
-                        App.UI.HideUI(ui.GetType());
+                        UI.Inst.HideUI(ui.GetType());
                         break;
                         // ui.Hide();
                     }
@@ -47,7 +47,7 @@ namespace NBF
 
         protected override void OnHide()
         {
-            Game.Input.OnUICanceled -= OnUICanceled;
+            InputManager.OnUICanceled -= OnUICanceled;
         }
 
         protected override void OnDestroy()