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using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class FragmentManager : MonoBehaviour
{
private static readonly HashSet<string> LoadedSceneNames = new();
// 关键：在每次进入 Play Mode（且不重启域）时，重置静态集合
[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
private static void ResetStaticState()
{
LoadedSceneNames.Clear();
// 如果有其他静态字段，也在这里一并重置
}
/// <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)
{
Debug.Log("Unloading: " + sceneName);
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)
{
Debug.Log("Loading: " + sceneName);
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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