问多场景启动的建设，如，从团结，如何？

EN

using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditor.SceneManagement;

public static class UpdateBuildSettigns
{
    [MenuItem("Example/UpdateBuildSettings")]
    public static void UpdateSettings()
    {
        // get current editor setup
        SceneSetup[] editorScenes = EditorSceneManager.GetSceneManagerSetup();

        // filter list e.g. get only scenes with isActive true
        var activeEditorScenes = editorScenes.Where(scene => scene.isLoaded);

        // set those scenes as the buildsettings
        List<EditorBuildSettingsScene> editorBuildSettingsScenes = new List<EditorBuildSettingsScene>();
        foreach (var sceneAsset in activeEditorScenes)
        {
            string scenePath = sceneAsset.path;

            // ignore unsaved scenes
            if (!string.IsNullOrEmpty(scenePath)) continue;

            editorBuildSettingsScenes.Add(new EditorBuildSettingsScene(scenePath, true));
        }

        // Set the Build Settings window Scene list
        EditorBuildSettings.scenes = editorBuildSettingsScenes.ToArray();
    }
}

using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine.SceneManagement;

[InitializeOnLoad]
public static class UpdateBuildSettigns
{
    // ofcourse you still can also call it via menu item
    [MenuItem("Example/UpdateBuildSettings")]
    public static void UpdateSettings()
    {
        //...
    }

    static UpdateBuildSettigns()
    {
        // it is always save to remove callbacks even if they are not there
        // makes sure they are always only added once
        //
        // this is a static constructor so actually there should be no
        // callbacks yet ... but .. you never know ;)
        EditorSceneManager.sceneOpened -= OnSceneLoaded;
        EditorSceneManager.sceneClosed -= OnSceneUnloaded;

        EditorSceneManager.sceneOpened += OnSceneLoaded;
        EditorSceneManager.sceneClosed += OnSceneUnloaded;
    }

    private static void OnSceneUnloaded(Scene current)
    {
        UpdateSettings();
    }

    private static void OnSceneLoaded(Scene current, OpenSceneMode mode)
    {
        UpdateSettings();
    }
}

// flag to check if auto-updates are currently enabled
private static bool isEnabled;

// disable the "EnableAutoUpdate" button if already enabled
[MenuItem("Example/EnableAutoUpdate", true)]
private static bool CanEnable()
{
    return !isEnabled;
}

// disable the "DisableAutoUpdate" button if already disabled
[MenuItem("Example/DisableAutoUpdate", true)]
private static bool CanDisable()
{
    return isEnabled;
}

// add callbacks
[MenuItem("Example/EnableAutoUpdate")]
private static void EnableAutoUpdate()
{
    // it is always save to remove callbacks even if they are not there
    // makes sure they are always only added once
    EditorSceneManager.sceneOpened -= OnSceneLoaded;
    EditorSceneManager.sceneClosed -= OnSceneUnloaded;

    EditorSceneManager.sceneOpened += OnSceneLoaded;
    EditorSceneManager.sceneClosed += OnSceneUnloaded;

    isEnabled = true;
}

// remove callbacks
[MenuItem("Example/DisableAutoUpdate")]
private static void DisableAutoUpdate()
{
    EditorSceneManager.sceneOpened -= OnSceneLoaded;
    EditorSceneManager.sceneClosed -= OnSceneUnloaded;

    isEnabled = false;
}

#if UNITY_EDITOR

// above code here

#endif

// making it a component to make sure it is inside of one scene
public class SceneLoader : MonoBehaviour
{
    private void Start()
    {
        var thisScene = SceneManager.GetActiveScene();

        // load all scenes
        for(int i = 0; i < SceneManager.sceneCountInBuildSettings; i++)
        {
            // skip if is current scene since we don't want it twice
            if(thisScene.buildIndex == i) continue;

             // Skip if scene is already loaded
            if(SceneManager.GetSceneByBuildIndex(i).IsValid()) continue;

            SceneManager.LoadScene(i, LoadSceneMode.Additive);
            // or depending on your usecase
            SceneManager.LoadSceneAsync(i, LoadSceneMode.Additive);
        }
    }
}

 // Get filename.
 string path = EditorUtility.SaveFolderPanel("Choose Location of Built Game", "", "");
 string[] levels = new string[] {"Assets/Scene1.unity", "Assets/Scene2.unity"}; // You'd have to assemble this list yourself.
 // Build player.
 BuildPipeline.BuildPlayer(levels, path + "/BuiltGame.exe", BuildTarget.StandaloneWindows, BuildOptions.None);