正在编写动态场景加载

1 files changed, 137 insertions, 0 deletions

diff --git a/Assets/Scripts/FragmentManager.cs b/Assets/Scripts/FragmentManager.cs
new file mode 100644
index 0000000..3bac110
--- /dev/null
+++ b/Assets/Scripts/FragmentManager.cs
@@ -0,0 +1,137 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class FragmentManager : MonoBehaviour
+{
+    private static readonly HashSet<string> LoadedSceneNames = new();
+
+    /// <summary>
+    /// 刷新场景需要列表（基于场景名称）
+    /// </summary>
+    /// <param name="requiredSceneNames">需要的场景名称列表（需与 Build Settings 中的名称一致，不带 .unity 扩展名）</param>
+    public static void UpdateSceneRequirements(List<string> requiredSceneNames)
+    {
+        var toUnload = new List<string>();
+        var toLoad = new List<string>();
+
+        // 需要卸载的：当前已加载但不在 requiredSceneNames 中
+        foreach (var loadedName in LoadedSceneNames)
+        {
+            if (!requiredSceneNames.Contains(loadedName))
+                toUnload.Add(loadedName);
+        }
+
+        // 需要加载的：requiredSceneNames 中尚未加载的
+        foreach (var reqName in requiredSceneNames)
+        {
+            if (!LoadedSceneNames.Contains(reqName))
+                toLoad.Add(reqName);
+        }
+
+        UnloadScenes(toUnload);
+        LoadScenes(toLoad);
+    }
+
+    /// <summary>
+    /// 重置所有场景（先卸载全部，再重新加载）
+    /// </summary>
+    public static void ReloadAllScenes()
+    {
+        var scenesToReload = new List<string>(LoadedSceneNames);
+
+        // 先卸载所有
+        foreach (var sceneName in scenesToReload)
+        {
+            var asyncOp = SceneManager.UnloadSceneAsync(sceneName);
+            if (asyncOp != null)
+            {
+                asyncOp.completed += _ =>
+                {
+                    if (LoadedSceneNames.Contains(sceneName))
+                        LoadedSceneNames.Remove(sceneName);
+                };
+            }
+            else
+            {
+                // 同步卸载后备（已过时，仅用于兼容）
+                if (SceneManager.UnloadScene(sceneName))
+                    LoadedSceneNames.Remove(sceneName);
+            }
+        }
+
+        // 重新加载（注意：卸载异步，立即加载可能导致短暂重叠，但通常可接受）
+        foreach (var sceneName in scenesToReload)
+        {
+            var asyncOp = SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
+            if (asyncOp != null)
+            {
+                asyncOp.completed += _ =>
+                {
+                    var scene = SceneManager.GetSceneByName(sceneName);
+                    if (scene.isLoaded && !LoadedSceneNames.Contains(sceneName))
+                        LoadedSceneNames.Add(sceneName);
+                };
+            }
+            else
+            {
+                // 同步加载后备
+                SceneManager.LoadScene(sceneName, LoadSceneMode.Additive);
+                var scene = SceneManager.GetSceneByName(sceneName);
+                if (scene.isLoaded && !LoadedSceneNames.Contains(sceneName))
+                    LoadedSceneNames.Add(sceneName);
+            }
+        }
+    }
+
+    /// <summary>
+    /// 异步卸载场景列表，完成后从 LoadedSceneNames 中移除
+    /// </summary>
+    private static void UnloadScenes(List<string> sceneNames)
+    {
+        foreach (var sceneName in sceneNames)
+        {
+            var asyncOp = SceneManager.UnloadSceneAsync(sceneName);
+            if (asyncOp != null)
+            {
+                asyncOp.completed += _ =>
+                {
+                    if (LoadedSceneNames.Contains(sceneName))
+                        LoadedSceneNames.Remove(sceneName);
+                };
+            }
+            else
+            {
+                if (SceneManager.UnloadScene(sceneName))
+                    LoadedSceneNames.Remove(sceneName);
+            }
+        }
+    }
+
+    /// <summary>
+    /// 异步加载场景列表，完成后加入 LoadedSceneNames
+    /// </summary>
+    private static void LoadScenes(List<string> sceneNames)
+    {
+        foreach (var sceneName in sceneNames)
+        {
+            var asyncOp = SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
+            if (asyncOp != null)
+            {
+                asyncOp.completed += _ =>
+                {
+                    var scene = SceneManager.GetSceneByName(sceneName);
+                    if (scene.isLoaded && !LoadedSceneNames.Contains(sceneName))
+                        LoadedSceneNames.Add(sceneName);
+                };
+            }
+            else
+            {
+                SceneManager.LoadScene(sceneName, LoadSceneMode.Additive);
+                var scene = SceneManager.GetSceneByName(sceneName);
+                if (scene.isLoaded && !LoadedSceneNames.Contains(sceneName))
+                    LoadedSceneNames.Add(sceneName);
+            }
+        }
+    }
+}
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