通过UnityWebRequest 下载好的图片视频，可以通过AssetBundle.UnloadAllAssetBundles(true)卸载掉吗

不可以。`AssetBundle.UnloadAllAssetBundles(true)`只能卸载通过`AssetBundle.LoadFromFile`或`AssetBundle.LoadFromMemory`等方法加载的AssetBundle资源包，而不能卸载通过`UnityWebRequest`加载的资源。

如果你想卸载通过`UnityWebRequest`下载的资源，可以使用`UnityWebRequestAssetBundle.GetAssetBundle()`方法来获取`AssetBundle`对象，然后再使用`AssetBundle.Unload(true)`方法来卸载资源。示例代码如下：

UnityWebRequest request = UnityWebRequest.GetAssetBundle("http://example.com/myAssetBundle");
yield return request.SendWebRequest();

AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(request);
// 使用bundle加载资源...

// 卸载bundle
bundle.Unload(true);

相关问题

unity 下载好之后的图片视频，如何进行清理代码实现

在Unity中，可以使用以下代码来清理不再使用的资源：

using UnityEngine;
using UnityEditor;

public class ResourceCleaner : EditorWindow
{
    [MenuItem("Tools/Clean Unused Resources")]
    public static void ShowWindow()
    {
        var window = GetWindow<ResourceCleaner>();
        window.Show();
    }

    void OnGUI()
    {
        if (GUILayout.Button("Clean Unused Resources"))
        {
            CleanUnusedResources();
        }
    }

    private static void CleanUnusedResources()
    {
        string[] guids = AssetDatabase.FindAssets("t:Prefab t:Scene t:ScriptableObject t:Material t:Texture t:Sprite t:AnimationClip");
        int totalCount = guids.Length;
        int currentIndex = 0;

        foreach (string guid in guids)
        {
            currentIndex++;
            string assetPath = AssetDatabase.GUIDToAssetPath(guid);
            EditorUtility.DisplayProgressBar("Cleaning Unused Resources", $"Processing {currentIndex} of {totalCount}", (float)currentIndex / totalCount);
            Object asset = AssetDatabase.LoadAssetAtPath(assetPath, typeof(Object));
            if (asset != null)
            {
                var dependencies = AssetDatabase.GetDependencies(assetPath, false);
                var isUnused = true;
                foreach (var dependency in dependencies)
                {
                    if (!dependency.Contains(assetPath) && !AssetDatabase.GetAssetPath(dependency).StartsWith("Packages/"))
                    {
                        isUnused = false;
                        break;
                    }
                }
                if (isUnused)
                {
                    Debug.Log($"Cleaning Unused Resource - {assetPath}", asset);
                    AssetDatabase.DeleteAsset(assetPath);
                }
            }
        }
        EditorUtility.ClearProgressBar();
        AssetDatabase.Refresh();
    }
}

这个代码会在Unity的菜单栏中添加一个 `Tools/Clean Unused Resources` 的选项，点击后会删除所有未被使用的资源。请注意，在执行此操作之前，请确保您的项目没有依赖于这些资源，否则可能会导致项目中的错误。

unity用 Assetbundle加载播放视频，要求点击esc跳过视频

要实现这个功能，你可以按照以下步骤进行：

1.将视频文件打包成 Assetbundle 格式。

2.在 Unity 中创建一个空的 GameObject，并将一个 VideoPlayer 组件添加到该对象上。

3.使用 Assetbundle.LoadAsync 方法异步加载视频 Assetbundle，并在加载完成后通过 VideoPlayer.source 属性将视频资源绑定到 VideoPlayer 组件上。

4.监听用户按下 ESC 键的事件，当 ESC 键被按下时，通过 VideoPlayer.Stop 方法停止视频播放，并将该 GameObject 销毁以释放内存。

下面是一个简单的代码示例：

using System.Collections;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.Video;

public class VideoPlayerController : MonoBehaviour
{
    public string assetBundleName;
    public string videoName;

    private VideoPlayer videoPlayer;
    private AssetBundle assetBundle;

    private void Start()
    {
        videoPlayer = gameObject.AddComponent<VideoPlayer>();
        StartCoroutine(LoadAssetBundle());
    }

    private IEnumerator LoadAssetBundle()
    {
        using (UnityWebRequest request = UnityWebRequestAssetBundle.GetAssetBundle(assetBundleName))
        {
            yield return request.SendWebRequest();

            if (request.result != UnityWebRequest.Result.Success)
            {
                Debug.LogError("Failed to load asset bundle: " + assetBundleName);
                yield break;
            }

            assetBundle = DownloadHandlerAssetBundle.GetContent(request);
            AssetBundleRequest loadRequest = assetBundle.LoadAssetAsync<VideoClip>(videoName);
            yield return loadRequest;

            if (loadRequest.asset == null)
            {
                Debug.LogError("Failed to load video asset: " + videoName);
                yield break;
            }

            videoPlayer.source = VideoSource.VideoClip;
            videoPlayer.clip = (VideoClip)loadRequest.asset;
            videoPlayer.Prepare();
            videoPlayer.Play();
        }
    }

    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            videoPlayer.Stop();
            Destroy(gameObject);
            assetBundle.Unload(true);
        }
    }
}

在上述代码中，我们首先使用 UnityWebRequest 获取视频 Assetbundle，然后通过 AssetBundle.LoadAssetAsync 异步加载视频资源，并将其绑定到 VideoPlayer 上进行播放。在用户按下 ESC 键的时候，我们停止视频播放并销毁该 GameObject 对象以释放内存。