Unity中的文件拷贝

在项目中经常遇到需要将streamingAssetsPath中的文件拷贝至persistentDataPath中，记录一下自己的实现方式：

    public static void CopyFile(string fileName, int imageType)
    {

        if (Application.platform == RuntimePlatform.Android)
        {

            using (UnityWebRequest request = UnityWebRequest.Get(Application.streamingAssetsPath + "/" + fileName))
            {
                request.timeout = 3;
                request.downloadHandler = new DownloadHandlerFile(Application.persistentDataPath + "/" + fileName);//直接将文件下载到外存
                request.SendWebRequest();

                float time = Time.time;
                //下载完成后执行的回调
                while (!request.isDone)
                {
                }
                request.Abort();
                //默认值是true，调用该方法不需要设置Dispose()，Unity就会自动在完成后调用Dispose()释放资源。
                request.disposeDownloadHandlerOnDispose = true;
                request.Dispose();
            }
        }
        else
        {
            File.Copy(Application.streamingAssetsPath + "/" + fileName, Application.persistentDataPath + "/" + fileName, true);
        }
    }