c# - 切换包含网络摄像头纹理的场景后 Unity3d 崩溃

Question

我有两个场景想在它们之间切换:场景 A 和 B场景 A 是默认场景场景 B 是包含 3d 平面的场景，其默认纹理为 webcameTexture，这是它的脚本:

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class Camera_panel_script : MonoBehaviour {

// Use this for initialization
public string deviceName;
 WebCamTexture webCameraTexture;
private WebCamDevice[] devices;

// Use this for initialization

IEnumerator Start() {

    yield return Application.RequestUserAuthorization(UserAuthorization.WebCam | UserAuthorization.Microphone);
    if (Application.HasUserAuthorization(UserAuthorization.WebCam | UserAuthorization.Microphone)) {
        WebCamDevice[] devices = WebCamTexture.devices;

        foreach(WebCamDevice cam in devices)
        {
            if(cam.isFrontFacing )
            {    
                webCameraTexture  =    new WebCamTexture(cam.name);
                webCameraTexture.deviceName  = cam.name;
                //if (webCameraTexture != null && webCameraTexture.didUpdateThisFrame) {
                renderer.material.mainTexture = webCameraTexture;
                webCameraTexture.Play();
                //}

                break;
            }
        }
    } else {
    }
}
void Update () {
    if (Input.GetKey (KeyCode.Escape)) {
        if(webCameraTexture!=null && webCameraTexture.isPlaying){
            webCameraTexture.Stop();

        }
        if(!webCameraTexture.isPlaying)
        {
            DestroyObject(gameObject);
            Application.LoadLevel("Game");
        }

    }
}

当我尝试再次切换到场景 A 时，我的应用程序崩溃了

if (Input.GetKey (KeyCode.Escape)) {
        if(webCameraTexture!=null && webCameraTexture.isPlaying){
            webCameraTexture.Stop();

        }
        if(!webCameraTexture.isPlaying)
        {
            DestroyObject(gameObject);
            Application.LoadLevel("Game");
        }

    }

我该如何解决这个问题？我搜索了统一论坛，但找不到合适的解决方案

编辑

我将我的脚本更改为:

 if (Input.GetKey (KeyCode.Escape)) {
    while (webCameraTexture!=null && webCameraTexture.isPlaying)
        {
            Debug.Log("is still playing");
            webCameraTexture.Stop();
            webCameraTexture=null;
            break;
        }
        Debug.Log("stoped playing");
        Application.LoadLevel("Game");
}

这个可以，但是切换太慢了，好像要一秒钟才能再次切换到场景A

Answer 1

如果您尝试在停止网络摄像头的同时更改场景，您的游戏将会崩溃。就我而言，我遇到了内存冲突。

comm="UnityMain" reason="memory violation" sig=11'

改进您的解决方案，更好的代码将是:

if (Input.GetKey (KeyCode.Escape)) 
{
    if (webCameraTexture != null && webCameraTexture.isPlaying)
    {
        Debug.Log("Camera is still playing");
        webCameraTexture.Pause();     

        while (webCameraTexture.isPlaying)
        {
            yield return null;
        }

        Debug.Log("Camera stopped playing");
    }

    webCameraTexture = null;
    Application.LoadLevel("Game");
}

如您所见，我只是在更改场景之前暂停了相机。