问Unity3d删除画廊中显示的当前图片

EN

tring path = Application.persistentDataPath;

    DirectoryInfo dir = new DirectoryInfo(path);
    FileInfo[] info = dir.GetFiles("*.png");

    foreach (FileInfo f in info)
    {
        File.Delete(f.FullName);
    }

 yield return new WaitForEndOfFrame();

    string timeStamp = System.DateTime.Now.ToString("dd-MM-yyyy-HH-mm-ss");
    string fileName = "Screenshot" + timeStamp + ".png";
    string pathToSave = fileName;
    ScreenCapture.CaptureScreenshot(pathToSave);
    yield return new WaitForEndOfFrame();

   public class ScreenShotPreview : MonoBehaviour
{
    [SerializeField]
    GameObject Panel;
    [SerializeField]
    string sceneName;

string[] files = null;
int whichScreenShotIsShown = 0;

void Start()
{

    files = Directory.GetFiles(Application.persistentDataPath + "/", "*.png");
    if (files.Length > 0)
    {
        GetPictureAndShowIt();
    }
}

void GetPictureAndShowIt()
{
    string pathToFile = files[whichScreenShotIsShown];
    Texture2D texture = GetScreenshotImage(pathToFile);
    Sprite sp = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
    Panel.GetComponent<Image>().sprite = sp;
}

Texture2D GetScreenshotImage(string filePath)
{
    Texture2D texture = null;
    byte[] fileBytes;
    if (File.Exists(filePath))
    {
        fileBytes = File.ReadAllBytes(filePath);
        texture = new Texture2D(2, 2, TextureFormat.RGB24, false);
        texture.LoadImage(fileBytes);
    }
    return texture;
}

public void NextPicture()
{
    if (files.Length > 0)
    {
        whichScreenShotIsShown += 1;
        if (whichScreenShotIsShown > files.Length - 1)
            whichScreenShotIsShown = 0;
        GetPictureAndShowIt();
    }
}

public void PreviousPicture()
{
    if (files.Length > 0)
    {
        whichScreenShotIsShown -= 1;
        if (whichScreenShotIsShown < 0)
            whichScreenShotIsShown = files.Length - 1;
        GetPictureAndShowIt();
    }
}