来回切换时场景未正确加载 [英] Scene not properly loaded when switching back and forth

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问题描述

问题
我构建的Unity项目面向iOS，Android和Windows X64.我有两个场景，A和B，而A是游戏的主菜单场景，场景B是一种关卡选择场景，用户可以在其中选择要玩的关卡.我可以从场景A导航到场景B，然后再次返回.在Unity编辑器中运行游戏时，所有行为均符合预期.当我在目标平台(真实设备)上运行游戏时，就会出现问题.然后，当像A-> B-> A一样导航时，我最终将场景A渲染为黑屏，除了FPSIndicator游戏对象仍在渲染并完成其工作. FPSIndicator游戏对象是一小段代码，可将其自身绘制到OnGUI回调中的场景.没有其他显示.

Problem
The Unity project I build is targeting iOS, Android and Windows X64. I have two scenes, A and B, whereas A is the main menu scene of my game and scene B is kind of a level selection scene in which the user can choose a level to play. From scene A I can navigate to scene B and back again. When running the game in the Unity Editor, everything behaves as expected. The problem arises, when I run the game on the target platforms (real devices). Then, when navigating like A --> B --> A, I end up in scene A being rendered as a black screen, except the FPSIndicator game object which is still rendered and doing its job. The FPSIndicator game object is a small piece of code which draws itself to the scene in the OnGUI callback. Nothing else is displayed.

场景A的设置
我在那里有一个Unity UI按钮(拖放")，单击该按钮时，将使用以下代码加载场景B:

Setup of Scene A
I have a Unity UI button there ("Drag and Drop"), which, when clicked, loads scene B using this code:

using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.EventSystems;

public class GameTypeButtonController : MonoBehaviour, IPointerClickHandler
{
    public ButtonSounds ButtonSounds;
    public string SceneNameToLoad;
    public GameType GameType;

    public void OnPointerClick(PointerEventData eventData)
    {
        StartCoroutine(Do());
    }

    private IEnumerator Do()
    {
        var animator = gameObject.GetComponent<Animator>();

        if (animator != null)
        {
            animator.SetTrigger("Clicked");
        }

        var audioSource = gameObject.GetComponent<AudioSource>();

        if (audioSource != null)
        {
            var clip = GetRandomAudioClip(ButtonSounds);
            audioSource.clip = clip;
            audioSource.Play();
            yield return new WaitWhile(() => audioSource.isPlaying);
        }

        Logger.LogInfo("[GameTypeButtonController.Do] Setting game type " + GameType);
        GameManager.Instance.CurrentGameType = GameType;
        SceneManager.LoadScene(SceneNameToLoad);
    }

    private AudioClip GetRandomAudioClip(ButtonSounds buttonSounds)
    {
        var numberOfAudioClips = buttonSounds.AudioClips.Length;
        var randomIndex = Random.Range(0, numberOfAudioClips);
        return buttonSounds.AudioClips[randomIndex];
    }
}

场景如下:

场景B的设置
在场景B中，我在左下方有一个按钮，单击该按钮可使我回到场景A.这不是Unity UI按钮，而是附加了CircleCollider2D的常规子画面.该按钮上的脚本如下所示:

Setup of Scene B
In scene B, I have a button in the lower left which brings me back to scene A when clicked. This is not a Unity UI button, but a regular sprite with a CircleCollider2D attached. The script on that button looks like this:

using System.Collections;
using UnityEngine;
using UnityEngine.SceneManagement;

public class HomeButtonController : MonoBehaviour
{
    public ButtonSounds ButtonSounds;
    public string SceneNameToLoad;

    void OnMouseDown()
    {
        StartCoroutine(Do());
    }

    private IEnumerator Do()
    {
        var animator = gameObject.GetComponent<Animator>();

        if (animator != null)
        {
            animator.SetTrigger("Clicked");
        }

        var audioSource = gameObject.GetComponent<AudioSource>();

        if (audioSource != null)
        {
            var clip = GetRandomAudioClip(ButtonSounds);
            audioSource.clip = clip;
            audioSource.Play();
            yield return new WaitWhile(() => audioSource.isPlaying);
        }

        SceneManager.LoadScene(SceneNameToLoad);
    }

    private AudioClip GetRandomAudioClip(ButtonSounds buttonSounds)
    {
        var numberOfAudioClips = buttonSounds.AudioClips.Length;
        var randomIndex = UnityEngine.Random.Range(0, numberOfAudioClips);
        return buttonSounds.AudioClips[randomIndex];
    }
}

场景如下:

一般说明
两个对象使用DontDestroyOnLoad:GameManager和MusicPlayer.

General Notes
Two objects use DontDestroyOnLoad: GameManager and MusicPlayer.

到目前为止我已检查的内容

在构建设置"中正确引用了场景
在我使用Unity Cloud Build时，我已禁用库缓存功能，以避免旧的构建工件出现问题(因此，每次构建时，我都会进行正确，干净的构建)
我可以在本地构建所有三个平台(Unity称其为构建成功").因此没有构建错误.
我正在使用LoadSceneMode.Single(默认)
我在本地和Unity Cloud Build:2018.3.0f2中使用相同的Unity版本

Scenes are properly referenced in Build Settings
As I use Unity Cloud Build, I have disabled the Library Caching feature to avoid issues with old build artifacts (so every time I build, I do a proper, clean build)
I can locally build all three platforms (Unity reports it as "Build successful"). So no build errors.
I am using LoadSceneMode.Single (default)
I am using the same Unity version locally and in Unity Cloud Build: 2018.3.0f2

更新2019-02-19:
当我使用相同的机制(称为协程"的精灵按钮)从第三个场景C导航回场景A时，我最终也会出现在完全相同的黑屏上.那么问题可能存在于场景A中吗?

Update 2019-02-19:
When I navigate from a third scene C back to scene A using the same mechanism (a sprite button calling a coroutine), I also end up on the very same black screen. So the issue probably exists within scene A?

2019年2月19日的更新2:
这是我的GameManager代码:

Update 2 from 2019-02-19:
Here's my GameManager code:

using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using UnityEngine;

public class GameManager : MonoBehaviour
{
    public EventHandler<LevelStartedEventArgs> LevelStarted;
    public EventHandler<LevelFinishedEventArgs> LevelFinished;

    // General 
    public GameType CurrentGameType;
    public GameScene CurrentScene;
    public int CurrentLevel;
    public static GameManager Instance;
    public GameLanguage Language;
    public bool IsMusicEnabled;
    private string gameStateFile;

    void Start()
    {
        if (Instance == null)
        {
            gameStateFile = Application.persistentDataPath + "/gamestate.dat";
            Load(gameStateFile);
            DontDestroyOnLoad(gameObject);
            Instance = this;
        }
        else if (Instance != this)
        {
            Destroy(gameObject);
        }
    }

    public void Save()
    {
        Logger.LogInfo("[GameManager.Save] Saving game state to " + gameStateFile);
        var bf = new BinaryFormatter();
        var file = File.Create(gameStateFile);

        var gameState = new GameState();
        gameState.Language = Language;
        gameState.IsMusicEnabled = IsMusicEnabled;

        bf.Serialize(file, gameState);
        file.Close();
        Logger.LogInfo("[GameManager.Save] Successfully saved game state");
    }

    public void Load(string gameStateFile)
    {
        Logger.LogInfo("[GameManager.Load] Loading game state from " + gameStateFile);
        if (File.Exists(gameStateFile))
        {
            var bf = new BinaryFormatter();
            var file = File.Open(gameStateFile, FileMode.Open);
            var gameState = (GameState)bf.Deserialize(file);
            file.Close();
            Language = gameState.Language;
            IsMusicEnabled = gameState.IsMusicEnabled;
        }
        Logger.LogInfo("[GameManager.Load] Successfully loaded game state");
    }

    [Serializable]
    class GameState {
        public GameLanguage Language;
        public bool IsMusicEnabled;
    }
}

感谢任何提示！

来回切换时场景未正确加载 [英] Scene not properly loaded when switching back and forth

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来回切换时场景未正确加载 [英] Scene not properly loaded when switching back and forth

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