Question

我遇到一个奇怪的问题：

我添加了一个场景，它确实显示了，但是Unity告诉我：

ArgumentException: SceneManager.SetActiveScene failed; scene 'inventory' is 
not loaded and therefore cannot be set active
UnityEngine.SceneManagement.SceneManager.SetActiveScene (Scene scene)
PlayerScript.enableScene (System.String SceneName) (at 
Assets/PlayerScript.cs:83)
PlayerScript.OnFinishedLoadingAllScene ()

我不确定这种情况如何发生。有人在我的代码中看到错误吗？

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

//First, load scene with SceneManager.LoadSceneAsync.Set allowSceneActivation to false so that the scene won't activate automatically after loading.

public class PlayerScript : MonoBehaviour
{
    public GameObject UIRootObject;
    private AsyncOperation _SceneAsync;
    private bool _bInventoryShown = false;
    private Scene PrevScene;

void Update()
{
    if (Input.GetKeyDown(KeyCode.I))
    {
        //player pressed I to show the inventory
        if (!_bInventoryShown)
        {
            //store the currently active scene
            PrevScene = SceneManager.GetActiveScene();

            //start loading the inventory scene
            StartCoroutine(loadScene("inventory"));
        }
        else
        {
            //player pressed I again to hide the inventory scene
            //so just set the previous scene as the active scene
            SceneManager.SetActiveScene(PrevScene);
        }

        _bInventoryShown = !_bInventoryShown;
    }
}
IEnumerator loadScene(string SceneName)
{
    AsyncOperation nScene = SceneManager.LoadSceneAsync(SceneName, LoadSceneMode.Additive);
    nScene.allowSceneActivation = false;
    _SceneAsync = nScene;

    //Wait until we are done loading the scene
    while (nScene.progress < 0.9f)
    {
        Debug.Log("Loading scene " + " [][] Progress: " + nScene.progress);
        yield return null;
    }

    //Activate the Scene
    _SceneAsync.allowSceneActivation = true;

    Scene nThisScene = SceneManager.GetSceneByName(SceneName);

    if (nThisScene.IsValid())
    {
        Debug.Log("Scene is Valid");
        SceneManager.MoveGameObjectToScene(UIRootObject, nThisScene);
        SceneManager.SetActiveScene(nThisScene);
    }
    else
    {
        Debug.Log("Invalid scene!!");
    }
}
}

我也尝试了以下方法：

    AsyncOperation nScene = SceneManager.LoadSceneAsync(SceneName, LoadSceneMode.Additive);
    nScene.allowSceneActivation = false;

    //Wait until we are done loading the scene
    while (!nScene.isDone)
    {
        Debug.Log("Loading scene " + " [][] Progress: " + nScene.progress);
        yield return null;
    }
    Debug.Log("Scene was loaded!");

从不调用最后一个日志（“场景已加载”）。

Answer 1

来自AsyncOperation.progress（另请参见示例）

返回操作进度。（只读）返回操作完成的接近程度。当进度浮点达到1.0并调用isDone时，操作完成。如果将allowSceneActivation设置为false，则进度将停止在0.9，直到将其设置为true。这对于创建加载条非常有用。

您应该已经设置了一段时间，但是无论如何都不要再等待

// ...

while (nScene.progress < 0.9f)
{
    Debug.Log("Loading scene " + " [][] Progress: " + nScene.progress);
    yield return null;
}

//Activate the Scene
_SceneAsync.allowSceneActivation = true;

while (!nScene.isDone)
{
    // wait until it is really finished
    yield return null;
}

//...

SceneManager.SetActiveScene失败：未加载场景

1 个答案: