Unity 使用UnityWebRequest加载网络图片和音频

使用Get请求把加载的出来的图片赋值给image显示出来

IEnumerator GetRequest(string url)
{
                                                    //请求地址
    UnityWebRequest unityWebRequest = UnityWebRequest.Get(url);
    //请求超时时间
    unityWebRequest.timeout = 10;
    //DownloadHandlerTexture专用于下载要用作 Texture 对象的图像的 DownloadHandler 子类
    DownloadHandlerTexture downloadHandlerTexture = new DownloadHandlerTexture(true);
    unityWebRequest.downloadHandler = downloadHandlerTexture;
    yield return unityWebRequest.SendWebRequest();

    //判断是否下载错误
    if (unityWebRequest.result == UnityWebRequest.Result.ConnectionError)
    {
        Debug.LogError(unityWebRequest.error);
    }
    else
    {
        int w = 200;
        int h = 500;
        Texture2D texture2 = new Texture2D(w, h);
        texture2 = downloadHandlerTexture.texture;
        Sprite sprite = Sprite.Create(texture2, new Rect(0, 0, texture2.width, texture2.height), new Vec