修复无法点击按钮问题

unity/Assets/UI/MainMenuUIController.cs

@@ -4,22 +4,19 @@ using UnityEngine.UI;
 namespace GameFramework
 {
     /// <summary>
-    /// 主菜单 UI 控制器（游戏封面）。
-    /// 包含游戏标题 + 开始游戏/剧情回放/制作人员按钮。
+    /// 主菜单 UI 控制器。
+    /// 支持开始游戏、设置、制作人员、退出游戏。
+    /// 修复：场景重载后自动重新查找 UI 引用，避免 DontDestroyOnLoad 导致的空引用问题。
     /// </summary>
     public class MainMenuUIController : MonoBehaviour
     {
-        [Header("标题")]
-        [SerializeField] Text titleText;
-        [SerializeField] Image titleImage;
-
         [Header("Buttons")]
         [SerializeField] Button startButton;
-        [SerializeField] Button storyReplayButton;
+        [SerializeField] Button settingsButton;
         [SerializeField] Button creditsButton;
         [SerializeField] Button quitButton;
 
-        [Header("Settings Panel (placeholder)")]
+        [Header("Settings Panel")]
         [SerializeField] GameObject settingsPanel;
         [SerializeField] Button settingsBackButton;
 
@@ -29,23 +26,38 @@ namespace GameFramework
 
         void Start()
         {
-            Debug.Log("[MainMenu] creditsButton=" + (creditsButton != null ? creditsButton.name : "NULL") + " creditsPanel=" + (creditsPanel != null ? creditsPanel.name : "NULL"));
+            // 自动查找（解决场景重载后引用失效问题）
+            if (startButton == null)
+                startButton = FindButton("StartButton");
+            if (settingsButton == null)
+                settingsButton = FindButton("SettingsButton");
+            if (creditsButton == null)
+                creditsButton = FindButton("CreditsButton");
+            if (quitButton == null)
+                quitButton = FindButton("QuitButton");
+
+            if (settingsPanel == null)
+                settingsPanel = GameObject.Find("SettingsPanel");
+            if (settingsBackButton == null && settingsPanel != null)
+                settingsBackButton = settingsPanel.GetComponentInChildren<Button>();
+
+            if (creditsPanel == null)
+                creditsPanel = GameObject.Find("CreditsPanel");
+            if (creditsCloseButton == null && creditsPanel != null)
+                creditsCloseButton = creditsPanel.GetComponentInChildren<Button>();
+
             // 绑定按钮事件
             if (startButton != null)
                 startButton.onClick.AddListener(OnStartClick);
-
-            if (storyReplayButton != null)
-                storyReplayButton.onClick.AddListener(OnStoryReplayClick);
-
+            if (settingsButton != null)
+                settingsButton.onClick.AddListener(OnSettingsClick);
             if (creditsButton != null)
                 creditsButton.onClick.AddListener(OnCreditsClick);
-
             if (quitButton != null)
                 quitButton.onClick.AddListener(OnQuitClick);
 
             if (settingsBackButton != null)
                 settingsBackButton.onClick.AddListener(OnSettingsBackClick);
-
             if (creditsCloseButton != null)
                 creditsCloseButton.onClick.AddListener(OnCreditsCloseClick);
 
@@ -56,29 +68,22 @@ namespace GameFramework
                 creditsPanel.SetActive(false);
         }
 
+        Button FindButton(string name)
+        {
+            var btn = GameObject.Find(name);
+            return btn != null ? btn.GetComponent<Button>() : null;
+        }
+
         void OnStartClick()
         {
             if (SceneLoader.Instance != null)
                 SceneLoader.Instance.LoadGameplayScene();
         }
 
-        void OnStoryReplayClick()
+        void OnSettingsClick()
         {
-            // TODO: 实现剧情回放功能
-            Debug.Log("[MainMenu] 剧情回放 - 待实现");
-        }
-
-        void OnCreditsClick()
-        {
-            Debug.Log("[MainMenu] OnCreditsClick called! creditsPanel=" + (creditsPanel != null ? creditsPanel.name : "NULL"));
-            if (creditsPanel != null)
-                creditsPanel.SetActive(true);
-        }
-
-        void OnCreditsCloseClick()
-        {
-            if (creditsPanel != null)
-                creditsPanel.SetActive(false);
+            if (settingsPanel != null)
+                settingsPanel.SetActive(true);
         }
 
         void OnSettingsBackClick()
@@ -87,6 +92,25 @@ namespace GameFramework
                 settingsPanel.SetActive(false);
         }
 
+        void OnCreditsClick()
+        {
+            if (creditsPanel != null)
+            {
+                creditsPanel.SetActive(true);
+                Debug.Log($"[MainMenu] Showing credits panel: {creditsPanel.name}");
+            }
+            else
+            {
+                Debug.LogWarning("[MainMenu] creditsPanel not found! Make sure a GameObject named 'CreditsPanel' exists in the scene.");
+            }
+        }
+
+        void OnCreditsCloseClick()
+        {
+            if (creditsPanel != null)
+                creditsPanel.SetActive(false);
+        }
+
         void OnQuitClick()
         {
 #if UNITY_EDITOR
@@ -95,15 +119,5 @@ namespace GameFramework
             Application.Quit();
 #endif
         }
-
-        void OnDestroy()
-        {
-            if (startButton != null) startButton.onClick.RemoveAllListeners();
-            if (storyReplayButton != null) storyReplayButton.onClick.RemoveAllListeners();
-            if (creditsButton != null) creditsButton.onClick.RemoveAllListeners();
-            if (quitButton != null) quitButton.onClick.RemoveAllListeners();
-            if (settingsBackButton != null) settingsBackButton.onClick.RemoveAllListeners();
-            if (creditsCloseButton != null) creditsCloseButton.onClick.RemoveAllListeners();
-        }
     }
 }