Application.streamingAssetsPath

描述

指向 StreamingAssets 文件夹的路径（只读）。

使用 StreamingAssets 文件夹来存储资源。在运行时，Application.streamingAssetsPath 提供文件夹的路径。将资源名称添加到 Application.streamingAssetsPath 中。构建后的应用程序可以从此地址加载资源。可以使用 Debug.Log 类将 StreamingAssets 文件夹的路径打印到 Unity 控制台。

在 WebGL 和 Android 平台上，您无法使用同步文件系统 API（如 C# System.IO.File 类）来访问 StreamingAssets 文件夹。WebGL 不允许进行文件访问。Android 使用压缩的 .apk 文件。这些平台会返回一个 URL。使用 UnityWebRequest 类来访问资源。

using UnityEngine;
using System.IO;
using UnityEngine.Video;

// Application-streamingAssetsPath example.
//
// Play a video and let the user stop/start it.
// The video location is StreamingAssets. The video is
// played on the camera background.

public class Example : MonoBehaviour
{
    private UnityEngine.Video.VideoPlayer videoPlayer;
    private string status;

    void Start()
    {
        GameObject cam = GameObject.Find("Main Camera");
        videoPlayer = cam.AddComponent<UnityEngine.Video.VideoPlayer>();

        // Obtain the location of the video clip.
        videoPlayer.url = Path.Combine(Application.streamingAssetsPath, "SampleVideo_1280x720_5mb.mp4");

        // Restart from beginning when done.
        videoPlayer.isLooping = true;

        // Do not show the video until the user needs it.
        videoPlayer.Pause();

        status = "Press to play";
    }

    void OnGUI()
    {
        GUIStyle buttonWidth = new GUIStyle(GUI.skin.GetStyle("button"));
        buttonWidth.fontSize = 18 * (Screen.width / 800);

        if (GUI.Button(new Rect(Screen.width / 16, Screen.height / 16, Screen.width / 3, Screen.height / 8), status, buttonWidth))
        {
            if (videoPlayer.isPlaying)
            {
                videoPlayer.Pause();
                status = "Press to play";
            }
            else
            {
                videoPlayer.Play();
                status = "Press to pause";
            }
        }
    }
}

以下代码示例演示了如何在 Android 平台上的 StreamingAssets 文件夹中访问文件。

using UnityEngine;
using UnityEngine.Networking;
using System.Threading.Tasks;

public class LoadStreamingAsset : MonoBehaviour
{
    async void Start()
    {
        string filePath = System.IO.Path.Combine(Application.streamingAssetsPath, "filetoload.txt");

        UnityWebRequest request = UnityWebRequest.Get(filePath);
        UnityWebRequestAsyncOperation operation = request.SendWebRequest();

        while (!operation.isDone)
        {
            await Task.Yield();
        }

        if (request.result == UnityWebRequest.Result.Success)
        {
            Debug.Log(request.downloadHandler.text);
        }
        else
        {
            Debug.LogError("Cannot load file at " + filePath);
        }
    }
}