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Assets/MyGame/Scripts/Turret/SitPosData.cs

@@ -1429,12 +1429,33 @@ public class SitPosData : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
 
         currentTurretNumber = turretNumber;
 
-        // 从 TurretResourcesData 拿预制体
+        // ⭐ 散包按需加载：缓存没有时异步取（PT{编号} 标签），完成后实例化
+        StartCoroutine(LoadTurretRoutine(turretNumber, ++_turretLoadSeq));
+    }
+
+    /// <summary>炮台加载序号（防加载期间再次切换的竞态）</summary>
+    private int _turretLoadSeq = 0;
+
+    /// <summary>炮台异步按需加载协程：AcquireTurretPrefabAsync 完成后实例化（原同步逻辑后半段）</summary>
+    private IEnumerator LoadTurretRoutine(int turretNumber, int seq)
+    {
         GameObject prefab = TurretResourcesData.GetTurretPrefab(turretNumber);
         if (prefab == null)
         {
-            Debug.LogWarning($"[SitPosData] 炮台预制体未加载: #{turretNumber}");
+            var task = TurretResourcesData.AcquireTurretPrefabAsync(turretNumber);
-            return;
+            while (!task.IsCompleted) yield return null;
+            if (seq != _turretLoadSeq) // 期间又切换了炮台 → 丢弃并归还引用
+            {
+                TurretResourcesData.ReleaseTurretPrefab(turretNumber);
+                yield break;
+            }
+            prefab = task.Result;
+        }
+        if (prefab == null)
+        {
+            TurretResourcesData.ReleaseTurretPrefab(turretNumber);
+            Debug.LogWarning($"[SitPosData] 炮台预制体未加载: #{turretNumber}（检查 PT{turretNumber} 标签配置）");
+            yield break;
         }
 
         // 克隆到父节点
@@ -1451,11 +1472,14 @@ public class SitPosData : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
         {
             Debug.LogError($"[SitPosData] 预制体上未找到 TurretData 组件: #{turretNumber}");
             Destroy(instance);
-            return;
+            yield break;
         }
 
         currentTurret.turretNumber = turretNumber;
 
+        // ⭐ 战神装备中判断：异步加载完成后实时读（原方法开头局部变量 zhanShenActive 不能跨协程）
+        bool zhanShenActive = currentZhanShenData != null;
+
         // 缓存旋转节点：优先用 TurretData.tra_RotationPivot，否则回退父节点
         tra_CurrTurret = GetTurretRotationPivot(currentTurret);
 
@@ -1591,12 +1615,30 @@ public class SitPosData : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
         // 先清理已有翅膀
         ClearWing();
 
-        // 从 TurretResourcesData 拿预制体
+        // ⭐ 散包按需加载（异步）：缓存没有时按 PT{编号} 标签取，完成后实例化
+        StartCoroutine(LoadWingRoutine(turretNumber, ++_turretLoadSeq));
+    }
+
+    /// <summary>翅膀异步按需加载协程（模式同炮台：seq 防竞态）</summary>
+    private IEnumerator LoadWingRoutine(int turretNumber, int seq)
+    {
         GameObject prefab = TurretResourcesData.GetTurretPrefab(turretNumber);
         if (prefab == null)
         {
-            Debug.LogWarning($"[SitPosData] 翅膀预制体未加载: #{turretNumber}");
+            var task = TurretResourcesData.AcquireTurretPrefabAsync(turretNumber);
-            return;
+            while (!task.IsCompleted) yield return null;
+            if (seq != _turretLoadSeq)
+            {
+                TurretResourcesData.ReleaseTurretPrefab(turretNumber);
+                yield break;
+            }
+            prefab = task.Result;
+        }
+        if (prefab == null)
+        {
+            TurretResourcesData.ReleaseTurretPrefab(turretNumber);
+            Debug.LogWarning($"[SitPosData] 翅膀预制体未加载: #{turretNumber}（检查 PT{turretNumber} 标签配置）");
+            yield break;
         }
 
         // 克隆到 wingParent，保持预制体原始位置/旋转/缩放
@@ -1637,20 +1679,52 @@ public class SitPosData : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
     /// （渲染由座位预设的 Camera + RawImage 完成，显示节点挂在 turretRotate 下会跟随瞄准旋转）。
     /// ⭐ 炮台/战神显示二选一：加载战神后隐藏 turretParent（仅游戏内，切换面板 UI 不受影响）。
     /// </summary>
+    /// <summary>战神加载序号（防加载期间再次切换的竞态：旧协程完成后丢弃结果）</summary>
+    private int _zsLoadSeq = 0;
+
     public void LoadZhanShen(int zhanShenNumber)
     {
         // XJMH 模式没有战神概念，直接跳过（和翅膀一致）
         if (turretControlMode == TurretControlMode.XJMH) return;
 
-        // 先清理已有战神（保留预设的 Camera，它是用来渲染战神到 RawImage 的）
+        // ⭐ 切换战神：释放上一个的按需资源引用（别的座位还在用同一个战神则只减计数不卸载）
-        ClearZhanShenInstance();
+        int prevNumber = currentZhanShenNumber;
+        ClearZhanShenInstance(); // 先清理已有战神实例（保留预设的 Camera）
+        if (prevNumber > 0 && prevNumber != zhanShenNumber)
+            TurretResourcesData.ReleaseZhanShen(prevNumber, ZhanShenUsage.GamePlay);
 
-        // 从 TurretResourcesData 拿游戏内使用的战神预制体
+        // ⭐ 异步按需加载（不再阻塞主线程）：散包模式下战神不预载，这里现取
-        GameObject prefab = TurretResourcesData.GetZhanShenPrefab(zhanShenNumber, ZhanShenUsage.GamePlay);
+        StartCoroutine(LoadZhanShenRoutine(zhanShenNumber, ++_zsLoadSeq));
+    }
+
+    /// <summary>
+    /// 战神异步加载协程：等 AcquireZhanShenAsync 完成后实例化。
+    /// 加载期间座位被销毁 / 又切换了别的战神 → 丢弃本次结果并归还引用。
+    /// </summary>
+    private IEnumerator LoadZhanShenRoutine(int zhanShenNumber, int seq)
+    {
+        var task = TurretResourcesData.AcquireZhanShenAsync(zhanShenNumber, ZhanShenUsage.GamePlay);
+        while (!task.IsCompleted)
+            yield return null;
+
+        // 竞态丢弃：期间又切换了战神（seq 变了）→ 归还本次引用
+        if (seq != _zsLoadSeq)
+        {
+            TurretResourcesData.ReleaseZhanShen(zhanShenNumber, ZhanShenUsage.GamePlay);
+            yield break;
+        }
+
+        GameObject prefab = task.Result;
         if (prefab == null)
         {
-            Debug.LogWarning($"[SitPosData] 战神使用预制体未加载: #{zhanShenNumber}（检查 ZSYX 标签配置）");
+            // 标签未配置（散包未拆）：回退全量字典（启动 PT+ZSYX 加载的）
-            return;
+            prefab = TurretResourcesData.GetZhanShenPrefab(zhanShenNumber, ZhanShenUsage.GamePlay);
+        }
+        if (prefab == null)
+        {
+            TurretResourcesData.ReleaseZhanShen(zhanShenNumber, ZhanShenUsage.GamePlay);
+            Debug.LogWarning($"[SitPosData] 战神使用预制体未加载: #{zhanShenNumber}（检查 ZS{zhanShenNumber}+ZSYX 标签配置）");
+            yield break;
         }
 
         // 克隆到 zhanShenParent，保持预制体原始位置/旋转/缩放
@@ -1702,7 +1776,11 @@ public class SitPosData : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
     /// <summary>清除战神并恢复普通炮台显示（炮台/战神显示二选一的另一半）</summary>
     public void ClearZhanShen()
     {
+        // ⭐ 卸下战神：释放按需资源引用（归零才真正卸包）
+        int prevNumber = currentZhanShenNumber;
         ClearZhanShenInstance();
+        if (prevNumber > 0)
+            TurretResourcesData.ReleaseZhanShen(prevNumber, ZhanShenUsage.GamePlay);
         currentZhanShenNumber = 0;
 
         // 恢复普通炮台显示（特殊鱼炮台使用中不显示：等 RestoreTurretVisual 统一恢复）

Assets/MyGame/Scripts/fishResources/TurretResources.cs

@@ -5,6 +5,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using UnityEngine.AddressableAssets;
 using UnityEngine.ResourceManagement.AsyncOperations;
+using UnityEngine.U2D;
 using static UnityEngine.AddressableAssets.Addressables;
 
 /// <summary>
@@ -50,6 +51,156 @@ public class TurretResourcesData
     // ---- 保留的 AA Handle（不释放，避免 Build 下资源被卸载）----
     private static readonly List<AsyncOperationHandle> _loadedHandles = new List<AsyncOperationHandle>();
 
+    // ==================== 战神按需加载（散包：用哪个加载哪个） ====================
+    // 每个战神单独打标签 ZS{编号}（如 ZS14901），展示 prefab = ZS{id}+Default，游戏内 = ZS{id}+ZSYX。
+    // 战神 prefab 不再带 PTCBZS 标签 → 启动全量加载(PT+Default/PT+ZSYX)不再拉出战神，
+    // turretchibangzhanshenres 包只剩炮台/翅膀/sprite，战神包按需单独加载。
+
+    /// <summary>战神 prefab 缓存：(编号, 用途) → prefab</summary>
+    private static readonly Dictionary<(int id, ZhanShenUsage usage), GameObject> _zsPrefabCache
+        = new Dictionary<(int, ZhanShenUsage), GameObject>();
+    /// <summary>战神加载句柄：(编号, 用途) → handle（卸载用；LoadAssetsAsync 返回 IList 句柄）</summary>
+    private static readonly Dictionary<(int id, ZhanShenUsage usage), AsyncOperationHandle<IList<GameObject>>> _zsHandles
+        = new Dictionary<(int, ZhanShenUsage), AsyncOperationHandle<IList<GameObject>>>();
+    /// <summary>战神引用计数：(编号, 用途) → 使用中的座位/预览数（归零才真正卸载，防止多座位共用误卸）</summary>
+    private static readonly Dictionary<(int id, ZhanShenUsage usage), int> _zsRefCount
+        = new Dictionary<(int, ZhanShenUsage), int>();
+
+    /// <summary>
+    /// ⭐ 按需获取单个战神 prefab（异步 + 引用计数）。
+    /// 用途：进房/换战神（GamePlay）、大厅预览（Display）。
+    /// 每次调用引用 +1；切换/关闭时配对调用 ReleaseZhanShen（-1），
+    /// 引用归零才真正卸载战神包 —— 多个座位用同一个战神不会互相误卸。
+    /// 标签：ZS{编号} + Default(展示)/ZSYX(游戏内) 交集；标签未配置时返回 null
+    /// （调用方可回退 GetZhanShenPrefab 查全量字典，平滑迁移）。
+    /// </summary>
+    public static async Task<GameObject> AcquireZhanShenAsync(int turretNumber, ZhanShenUsage usage)
+    {
+        var key = (turretNumber, usage);
+        _zsRefCount[key] = _zsRefCount.TryGetValue(key, out int c) ? c + 1 : 1;
+        if (_zsPrefabCache.TryGetValue(key, out var cached)) return cached;
+
+        var keys = new List<string> { "ZS" + turretNumber, usage == ZhanShenUsage.GamePlay ? zhanShenGameSubLabel : defaultSubLabel };
+        var handle = Addressables.LoadAssetsAsync<GameObject>(keys, null, MergeMode.Intersection);
+        await handle.Task;
+        if (handle.Status == AsyncOperationStatus.Succeeded && handle.Result != null && handle.Result.Count > 0)
+        {
+            // 展示/游戏内同名靠标签区分，交集结果取第一个
+            _zsPrefabCache[key] = handle.Result[0];
+            _zsHandles[key] = handle;
+            return handle.Result[0];
+        }
+        // 加载失败（标签未配置等）：归还引用计数，不缓存句柄
+        if (handle.IsValid()) Addressables.Release(handle);
+        _zsRefCount[key] = c; // 还原为进入时的值
+        if (_zsRefCount[key] <= 0) _zsRefCount.Remove(key);
+        return null;
+    }
+
+    /// <summary>
+    /// ⭐ 按需获取炮台/翅膀 prefab（异步 + 引用计数，标签 PT{编号}，如 PT11001）。
+    /// 散包模式下启动不再全量加载 prefab，座位装炮台/大厅预览时按需取。
+    /// 与 ReleaseTurretPrefab 配对（切换/关闭时 -1，归零卸包）。
+    /// </summary>
+    public static async Task<GameObject> AcquireTurretPrefabAsync(int turretNumber)
+    {
+        _ptRefCount[turretNumber] = _ptRefCount.TryGetValue(turretNumber, out int c) ? c + 1 : 1;
+        if (_ptPrefabCache.TryGetValue(turretNumber, out var cached)) return cached;
+
+        var handle = Addressables.LoadAssetsAsync<GameObject>(new List<string> { "PT" + turretNumber }, null, MergeMode.Intersection);
+        await handle.Task;
+        if (handle.Status == AsyncOperationStatus.Succeeded && handle.Result != null && handle.Result.Count > 0)
+        {
+            _ptPrefabCache[turretNumber] = handle.Result[0];
+            _ptHandles[turretNumber] = handle;
+            return handle.Result[0];
+        }
+        if (handle.IsValid()) Addressables.Release(handle);
+        _ptRefCount[turretNumber] = c;
+        if (_ptRefCount[turretNumber] <= 0) _ptRefCount.Remove(turretNumber);
+        return null;
+    }
+
+    /// <summary>释放炮台/翅膀 prefab 引用（与 AcquireTurretPrefabAsync 配对，归零卸包）</summary>
+    public static void ReleaseTurretPrefab(int turretNumber)
+    {
+        if (!_ptRefCount.TryGetValue(turretNumber, out int c) || c <= 0) return;
+        if (c > 1) { _ptRefCount[turretNumber] = c - 1; return; }
+        _ptRefCount.Remove(turretNumber);
+        if (_ptHandles.TryGetValue(turretNumber, out var h) && h.IsValid())
+            Addressables.Release(h);
+        _ptHandles.Remove(turretNumber);
+        _ptPrefabCache.Remove(turretNumber);
+    }
+
+    /// <summary>按需缓存：炮台/翅膀 prefab（PT{编号} 标签）</summary>
+    private static readonly Dictionary<int, GameObject> _ptPrefabCache = new Dictionary<int, GameObject>();
+    private static readonly Dictionary<int, AsyncOperationHandle<IList<GameObject>>> _ptHandles = new Dictionary<int, AsyncOperationHandle<IList<GameObject>>>();
+    private static readonly Dictionary<int, int> _ptRefCount = new Dictionary<int, int>();
+
+    /// <summary>
+    /// 强制卸载按需加载的炮台/翅膀 prefab（离房时调用，忽略引用计数）。
+    /// </summary>
+    public static void UnloadAllTurretPrefabs()
+    {
+        var keys = new List<int>(_ptHandles.Keys);
+        foreach (var k in keys)
+        {
+            if (_ptHandles[k].IsValid())
+                Addressables.Release(_ptHandles[k]);
+        }
+        _ptHandles.Clear();
+        _ptPrefabCache.Clear();
+        _ptRefCount.Clear();
+        if (keys.Count > 0)
+            Debug.Log($"[TurretResourcesData] 卸载炮台/翅膀按需 prefab {keys.Count} 项");
+    }
+
+    /// <summary>
+    /// 释放战神引用（切换战神/关闭预览时调用，与 AcquireZhanShenAsync 配对）。
+    /// 引用归零才真正卸载包；标签未配置走全量回退时此调用无害（没有计数项直接跳过）。
+    /// </summary>
+    public static void ReleaseZhanShen(int turretNumber, ZhanShenUsage usage)
+    {
+        var key = (turretNumber, usage);
+        if (!_zsRefCount.TryGetValue(key, out int c) || c <= 0) return;
+        if (c > 1)
+        {
+            _zsRefCount[key] = c - 1;
+            return;
+        }
+        // 归零：真正卸载
+        _zsRefCount.Remove(key);
+        if (_zsHandles.TryGetValue(key, out var h) && h.IsValid())
+            Addressables.Release(h);
+        _zsHandles.Remove(key);
+        _zsPrefabCache.Remove(key);
+    }
+
+    /// <summary>
+    /// 强制卸载按需加载的战神资源（离房时清游戏内的；面板关闭可清展示的）。
+    /// usage 传 null 清全部。忽略引用计数（离房场景所有引用者都已销毁）。
+    /// </summary>
+    public static void UnloadAllZhanShen(ZhanShenUsage? usage = null)
+    {
+        var toRemove = new List<(int, ZhanShenUsage)>();
+        foreach (var kv in _zsHandles)
+        {
+            if (usage == null || kv.Key.usage == usage.Value)
+                toRemove.Add(kv.Key);
+        }
+        foreach (var k in toRemove)
+        {
+            if (_zsHandles[k].IsValid())
+                Addressables.Release(_zsHandles[k]);
+            _zsHandles.Remove(k);
+            _zsPrefabCache.Remove(k);
+            _zsRefCount.Remove(k);
+        }
+        if (toRemove.Count > 0)
+            Debug.Log($"[TurretResourcesData] 卸载战神按需资源 {toRemove.Count} 项（usage={usage?.ToString() ?? "全部"}）");
+    }
+
     static TurretResourcesData()
     {
         Init();
@@ -147,54 +298,58 @@ public class TurretResourcesData
         Addressables.Release(zsDepHandle);
         Debug.Log("[TurretResourcesData] 战神游戏内依赖资源预下载完成！");
 
-        // ---- 加载炮台 Prefab（展示用）----
+        // ⭐ 散包模式：炮台/翅膀/战神的 prefab 不再启动全量加载（每个资源一个小包，
-        var prefabHandle = Addressables.LoadAssetsAsync<GameObject>(labels, prefab =>
+        //   全量会把上百个散包全部拉起 —— 刚登录 194 个包的根源）。
-        {
+        //   prefab 全部按需：炮台/翅膀走 AcquireTurretPrefabAsync(PT{编号} 标签)，
-            if (turretPrefabPathDic.TryGetValue(prefab.name, out int id))
+        //   战神走 AcquireZhanShenAsync(ZS{编号}+Default/ZSYX 标签)。
-            {
+        //   启动只加载列表小图 Sprite（若 Sprite 与 prefab 同包仍会拉起散包，
-                turretPrefabDic[id] = prefab;
+        //   应把列表小图合入图集 —— 见 SpriteAtlasBuilderWindow 工具）。
-                Debug.Log($"[TurretResourcesData] 加载 Prefab: {prefab.name} (ID={id})");
-            }
-        }, MergeMode.Intersection);
 
-        await prefabHandle.Task;
+        // ---- 加载炮台 Sprite（列表图标，全量保留）----
-        // 不释放！保留 Handle 以保持资源存活
-        _loadedHandles.Add(prefabHandle);
-        Debug.Log($"[TurretResourcesData] 炮台 Prefab 加载完成，共 {turretPrefabDic.Count} 个");
-
-        // ---- 加载战神游戏内 Prefab（ZSYX 子标签；与展示同名，靠标签区分）----
-        var zsPrefabHandle = Addressables.LoadAssetsAsync<GameObject>(zsGameLabels, prefab =>
-        {
-            if (turretPrefabPathDic.TryGetValue(prefab.name, out int id)
-                && turretDataDic.TryGetValue(id, out var data)
-                && data.turretType == 2)   // 只收战神(turretType==2)的游戏内使用预制体
-            {
-                turretGamePrefabDic[id] = prefab;
-                Debug.Log($"[TurretResourcesData] 加载战神游戏内 Prefab: {prefab.name} (ID={id})");
-            }
-        }, MergeMode.Intersection);
-
-        await zsPrefabHandle.Task;
-        // 不释放！保留 Handle 以保持资源存活
-        _loadedHandles.Add(zsPrefabHandle);
-        Debug.Log($"[TurretResourcesData] 战神游戏内 Prefab 加载完成，共 {turretGamePrefabDic.Count} 个");
-
-        // ---- 加载炮台 Sprite ----
         var spriteHandle = Addressables.LoadAssetsAsync<Sprite>(labels, data =>
         {
             if (turretSpritePathDic.TryGetValue(data.name, out int id))
             {
                 turretSpriteDic[id] = data;
-                Debug.Log($"[TurretResourcesData] 加载 Sprite: {data.name} (ID={id})");
             }
         }, MergeMode.Intersection);
 
         await spriteHandle.Task;
         // 不释放！保留 Handle 以保持资源存活
         _loadedHandles.Add(spriteHandle);
-        Debug.Log($"[TurretResourcesData] 炮台 Sprite 加载完成，共 {turretSpriteDic.Count} 个");
 
-        Debug.Log("[TurretResourcesData] 所有炮台资源加载完毕！");
+        // ⭐ 图集兜底：列表小图已合入 SpriteAtlas 且 sprite 从组里移除（标签查不到）时，
+        //   按图集标签 "TurretAtlas" 加载图集，用 GetSprite(名) 填表。
+        //   （图集方式下 sprite 仍在图集里保留原名 = prefabTurretResourcesPath）
+        if (turretSpriteDic.Count == 0)
+        {
+            try
+            {
+                var atlasHandle = Addressables.LoadAssetsAsync<SpriteAtlas>("TurretAtlas", null);
+                await atlasHandle.Task;
+                if (atlasHandle.Status == AsyncOperationStatus.Succeeded
+                    && atlasHandle.Result != null && atlasHandle.Result.Count > 0)
+                {
+                    var atlas = atlasHandle.Result[0];
+                    foreach (var kv in turretSpritePathDic)
+                    {
+                        var sp = atlas.GetSprite(kv.Key);
+                        if (sp != null)
+                            turretSpriteDic[kv.Value] = sp;
+                    }
+                    _loadedHandles.Add(atlasHandle);
+                    Debug.Log($"[TurretResourcesData] 图集方式加载 Sprite 完成，共 {turretSpriteDic.Count} 个（来自 {atlas.name}）");
+                }
+            }
+            catch (Exception e)
+            {
+                Debug.LogWarning($"[TurretResourcesData] 图集兜底加载失败（未找到 TurretAtlas 标签的图集？）: {e.Message}");
+            }
+        }
+        else
+        {
+            Debug.Log($"[TurretResourcesData] 炮台 Sprite 加载完成，共 {turretSpriteDic.Count} 个（prefab 已改按需加载）");
+        }
     }
 
     /// <summary>
@@ -229,22 +384,28 @@ public class TurretResourcesData
         return turretDataDic != null && turretDataDic.TryGetValue(turretNumber, out var data) ? data : null;
     }
 
-    /// <summary>根据 ID 获取炮台 Prefab。</summary>
+    /// <summary>根据 ID 获取炮台 Prefab。⭐ 优先查按需缓存（PT{编号} 标签），回退全量字典（已不再填充，恒空）。</summary>
     public static GameObject GetTurretPrefab(int turretNumber)
     {
-        return turretPrefabDic != null && turretPrefabDic.TryGetValue(turretNumber, out var prefab) ? prefab : null;
+        if (_ptPrefabCache.TryGetValue(turretNumber, out var prefab)) return prefab;
+        return turretPrefabDic != null && turretPrefabDic.TryGetValue(turretNumber, out var fullLoad) ? fullLoad : null;
     }
 
     /// <summary>
     /// 根据战神编号获取战神预制体（两种情况二选一）。
     /// - Display：展示用（大厅/商城预览，与 GetTurretPrefab 返回同一个展示模型）；
     /// - GamePlay：游戏内用（座位上替代普通炮台的使用模型）。
-    /// 未加载、非战神或未配置使用预制体时返回 null。
+    /// ⭐ 优先查按需加载缓存（散包）；未加载时回退全量加载的字典（标签未拆时的平滑迁移）。
     /// </summary>
     public static GameObject GetZhanShenPrefab(int turretNumber, ZhanShenUsage usage = ZhanShenUsage.Display)
     {
+        // 按需缓存优先
+        if (_zsPrefabCache.TryGetValue((turretNumber, usage), out var prefab))
+            return prefab;
+
+        // 回退：全量加载的字典（战神 prefab 未去 PTCBZS 标签时仍会被启动全量加载进来）
         var dic = usage == ZhanShenUsage.GamePlay ? turretGamePrefabDic : turretPrefabDic;
-        return dic != null && dic.TryGetValue(turretNumber, out var prefab) ? prefab : null;
+        return dic != null && dic.TryGetValue(turretNumber, out var fullLoad) ? fullLoad : null;
     }
 
     /// <summary>根据 ID 获取炮台 Sprite。</summary>

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Assets/MyGame/aa/UI/Game/GameMainPanel_FishBase.cs

@@ -1396,6 +1396,8 @@ public class GameMainPanel_FishBase : GameMainPanel_Base
         await AudioResourcesData.UnLoadAudioGame();
         if (flow != _resourceFlowToken) return;
         UnLoadBulletClip(); // ⭐ 释放开火音效句柄（引用计数归零）
+        TurretResourcesData.UnloadAllZhanShen(ZhanShenUsage.GamePlay); // ⭐ 卸载按需加载的战神（游戏内）
+        TurretResourcesData.UnloadAllTurretPrefabs(); // ⭐ 卸载按需加载的炮台/翅膀 prefab
         await MonsterMoveLine.UnLoadBezier();
         if (flow != _resourceFlowToken) return;
         // ⭐ 清空子弹池 + 特效池（鱼池已在 UnLoadFishAssetsData 内清理）
@@ -1445,6 +1447,8 @@ public class GameMainPanel_FishBase : GameMainPanel_Base
             await FishResourcesData.UnLoadFishAssetsData();
             await AudioResourcesData.UnLoadAudioGame();
             UnLoadBulletClip();
+            TurretResourcesData.UnloadAllZhanShen(ZhanShenUsage.GamePlay);
+            TurretResourcesData.UnloadAllTurretPrefabs();
             await MonsterMoveLine.UnLoadBezier();
             Debug.Log("[ChangeRoom] 切房失败，游戏资源已补卸载");
         }
@@ -1530,6 +1534,8 @@ public class GameMainPanel_FishBase : GameMainPanel_Base
                 SetUnloadProgress(0.4f);
                 await AudioResourcesData.UnLoadAudioGame();
                 UnLoadBulletClip(); // ⭐ 释放开火音效句柄（引用计数归零）
+                TurretResourcesData.UnloadAllZhanShen(ZhanShenUsage.GamePlay); // ⭐ 卸载按需加载的战神（游戏内）
+                TurretResourcesData.UnloadAllTurretPrefabs(); // ⭐ 卸载按需加载的炮台/翅膀 prefab
 
                 SetUnloadProgress(0.6f);
                 await MonsterMoveLine.UnLoadBezier();

Assets/MyGame/aa/UI/Home/Sub/UIHome_BY_ItemListPanels.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
@@ -464,6 +465,7 @@ public class UIHome_BY_ItemListPanels : SubUIBase
 
     private void ClearItemList()
     {
+        ReleasePreviewAcquired(); // ⭐ 切列表/关面板：释放当前预览的按需资源
         foreach (var toggle in _instantiatedToggles)
         {
             if (toggle != null)
@@ -659,6 +661,7 @@ public class UIHome_BY_ItemListPanels : SubUIBase
 
     private void ClearZhanShenItemList()
     {
+        ReleasePreviewAcquired(); // ⭐ 切列表/关面板：释放当前预览的按需资源
         foreach (var toggle in _instantiatedZSItemToggles)
         {
             if (toggle != null)
@@ -725,12 +728,8 @@ public class UIHome_BY_ItemListPanels : SubUIBase
         if (rawImg_DetailPreview != null)
             rawImg_DetailPreview.gameObject.SetActive(true);
 
-        // ---- 预览（和翅膀一样实例化预制体到预览区）----
+        // ---- 预览（⭐按需加载：点哪个战神加载哪个，切走自动释放上一个）----
-        if (resData != null && previewParent != null && prefab != null)
+        ShowPreviewOnDemand(turretNumber, true);
-        {
-            _currentPreviewObj = Instantiate(prefab, previewParent);
-            _currentPreviewObj.SetActive(true);
-        }
     }
 
     // ==================== 战神选择按钮 ====================
@@ -994,14 +993,12 @@ public class UIHome_BY_ItemListPanels : SubUIBase
             rawImg_DetailPreview.gameObject.SetActive(_currentSelectType != ItemPanelSelect.Turrect);
 
         // ---- 预览 ----
-        if (resData != null && previewParent != null && prefab != null)
+        // ---- 预览（⭐按需加载：点哪个加载哪个，切走自动释放上一个）----
+        ShowPreviewOnDemand(turretNumber, false, obj =>
         {
-            _currentPreviewObj = Instantiate(prefab, previewParent);
+            if (obj != null && _currentSelectType == ItemPanelSelect.Turrect)
-            _currentPreviewObj.SetActive(true);
-
-            if (_currentSelectType == ItemPanelSelect.Turrect)
             {
-                var rt = _currentPreviewObj.GetComponent<RectTransform>();
+                var rt = obj.GetComponent<RectTransform>();
                 if (rt != null)
                 {
                     rt.anchorMin = new Vector2(0.5f, 0f);
@@ -1010,7 +1007,7 @@ public class UIHome_BY_ItemListPanels : SubUIBase
                     rt.localScale = Vector3.one * 2.5f;
                 }
             }
-        }
+        });
     }
 
     /// <summary>清除预览区当前展示的实例。</summary>
@@ -1023,6 +1020,71 @@ public class UIHome_BY_ItemListPanels : SubUIBase
         }
     }
 
+    // ==================== 预览按需加载（点哪个加载哪个，切走释放上一个） ====================
+
+    private int _previewSeq = 0;
+    /// <summary>当前预览已 Acquire 的编号（切走时释放）</summary>
+    private int _previewAcquiredId = 0;
+    private bool _previewAcquiredIsZS = false;
+
+    /// <summary>
+    /// ⭐ 按需加载并显示预览模型：释放上一个的按需引用 → 异步获取当前 → 实例化。
+    /// 战神走 ZS{编号}+Display 标签，炮台/翅膀走 PT{编号} 标签。
+    /// 快速连续点击由 seq 竞态丢弃（只显示最后点的那一个）。
+    /// onLoaded：实例化后的回调（炮台预览的 RectTransform 特殊处理等）。
+    /// </summary>
+    private void ShowPreviewOnDemand(int turretNumber, bool isZhanShen, System.Action<GameObject> onLoaded = null)
+    {
+        StartCoroutine(ShowPreviewRoutine(turretNumber, isZhanShen, onLoaded, ++_previewSeq));
+    }
+
+    private IEnumerator ShowPreviewRoutine(int turretNumber, bool isZhanShen, System.Action<GameObject> onLoaded, int seq)
+    {
+        // 释放上一个预览的按需引用（归零卸包 → 内存里同时只有一个预览资源）
+        ReleasePreviewAcquired();
+
+        if (turretNumber <= 0 || previewParent == null)
+        {
+            ClearPreview();
+            onLoaded?.Invoke(null);
+            yield break;
+        }
+
+        var task = isZhanShen
+            ? TurretResourcesData.AcquireZhanShenAsync(turretNumber, ZhanShenUsage.Display)
+            : TurretResourcesData.AcquireTurretPrefabAsync(turretNumber);
+        while (!task.IsCompleted)
+            yield return null;
+
+        // 期间又点了别的 → 丢弃本次并归还引用
+        if (seq != _previewSeq)
+        {
+            if (isZhanShen) TurretResourcesData.ReleaseZhanShen(turretNumber, ZhanShenUsage.Display);
+            else TurretResourcesData.ReleaseTurretPrefab(turretNumber);
+            yield break;
+        }
+
+        GameObject prefab = task.Result;
+        ClearPreview();
+        if (prefab != null)
+        {
+            _previewAcquiredId = turretNumber;
+            _previewAcquiredIsZS = isZhanShen;
+            _currentPreviewObj = Instantiate(prefab, previewParent);
+            _currentPreviewObj.SetActive(true);
+        }
+        onLoaded?.Invoke(_currentPreviewObj);
+    }
+
+    /// <summary>释放当前预览的按需引用（面板关闭/切列表时调用，归零卸包）</summary>
+    private void ReleasePreviewAcquired()
+    {
+        if (_previewAcquiredId <= 0) return;
+        if (_previewAcquiredIsZS) TurretResourcesData.ReleaseZhanShen(_previewAcquiredId, ZhanShenUsage.Display);
+        else TurretResourcesData.ReleaseTurretPrefab(_previewAcquiredId);
+        _previewAcquiredId = 0;
+    }
+
     /// <summary>根据道具数据生成特殊效果描述。</summary>
     private static string GetSpecialEffectText(TurretResourcesData resData, TurretData turretData, BaseUserProp userProp = null)
     {