UI系统优化

Assets/_Game/Scripts/UI/Menus/PauseMenuController.cs

@@ -1,5 +1,6 @@
 using UnityEngine;
 using UnityEngine.UI;
+using UnityEngine.EventSystems;
 using BaseGames.Core;
 using BaseGames.Core.Assets;
 using BaseGames.Core.Events;
@@ -11,10 +12,10 @@ namespace BaseGames.UI
     /// 挂载在 Canvas_Menu → PauseMenuPanel GameObject 上。
     /// 按钮绑定在 Awake 中完成；由 UIManager 负责面板开关。
     /// </summary>
-    public class PauseMenuController : MonoBehaviour
+    public class PauseMenuController : MonoBehaviour, IFocusable
     {
-        [SerializeField] private UIManager  _uiManager;
-        [SerializeField] private GameObject _settingsRoot;  // SettingsPanel 根 GameObject
+        // UIManager 通过 ServiceLocator 解析，开启时自动获取，无需 Inspector 直接绑定具体类型
+        private IUIManager _uiManager;
 
         [Header("按钮引用")]
         [SerializeField] private Button _btnResume;
@@ -28,10 +29,23 @@ namespace BaseGames.UI
 
         private void Awake()
         {
-            _btnResume.onClick.AddListener(Resume);
-            _btnSettings.onClick.AddListener(OpenSettings);
-            _btnMainMenu.onClick.AddListener(GoToMainMenu);
-            _btnQuit.onClick.AddListener(Application.Quit);
+            _btnResume?.onClick.AddListener(Resume);
+            _btnSettings?.onClick.AddListener(OpenSettings);
+            _btnMainMenu?.onClick.AddListener(GoToMainMenu);
+            _btnQuit?.onClick.AddListener(Application.Quit);
+        }
+
+        private void OnEnable()
+        {
+            // 暂停面板由 UIManager 开启，此时 ServiceLocator 已就绪
+            _uiManager = ServiceLocator.GetOrDefault<IUIManager>();
+            // 手柄导航：打开时将焦点置于第一个按钮
+            EventSystem.current?.SetSelectedGameObject(_btnResume?.gameObject);
+        }
+
+        private void OnDisable()
+        {
+            _uiManager = null;
         }
 
         // ── 按钮回调 ──────────────────────────────────────────────────────────
@@ -39,18 +53,17 @@ namespace BaseGames.UI
         private void Resume()
         {
             _onResumeRequested?.Raise();
-            _uiManager.CloseTopPanel();
+            _uiManager?.CloseTopPanel();
         }
 
         private void OpenSettings()
         {
-            if (_settingsRoot != null)
-                _uiManager.OpenPanel(_settingsRoot);
+            _uiManager?.OpenPanel(PanelId.Settings);
         }
 
         private void GoToMainMenu()
         {
-            _uiManager.CloseTopPanel();
+            _uiManager?.CloseTopPanel();
             _onSceneLoadRequest?.Raise(new SceneLoadRequest
             {
                 SceneName         = AddressKeys.SceneMainMenu,
@@ -58,5 +71,11 @@ namespace BaseGames.UI
                 ShowLoadingScreen = false,
             });
         }
+
+        // ── IFocusable ────────────────────────────────────────────────────────
+
+        /// <summary>面板恢复为栈顶时（关闭子面板后）自动移回第一个按鈕。</summary>
+        public void OnFocusRestored()
+            => EventSystem.current?.SetSelectedGameObject(_btnResume?.gameObject);
     }
 }