unity 加载本地资源的几种方式

1.Resources:

Resources.Load(path);

2.AssetDatabase:

AssetDatabase.LoadAssetAtPath(path);

3.WWW:

public static IEnumerator WWWLoad(string url)
{
     WWW www = new WWW(url);
     yield return www;
}

4.UnityWebRequest:

 public static IEnumerator UnityWebRequestLoad(string url)
    {
        UnityWebRequest webRequest = UnityWebRequestTexture.GetTexture(url);
        yield return webRequest.SendWebRequest();
        if (webRequest.isNetworkError || webRequest.isHttpError)
        {
            Debug.Log(webRequest.error);
        }
        else
        {
        	//www.downloadHandler.text拿到的json
            yield return null;
        }
    }
    //直接获取完毕下载到path里面
 IEnumerator DownloadSceneJsonRequest(string url, string path, Action callback)
    {
        var uri = new Uri(Const.Url + url);
        var uwr = new UnityWebRequest(uri, UnityWebRequest.kHttpVerbGET)
        {
            downloadHandler = new DownloadHandlerFile(path)
        };
        yield return uwr.SendWebRequest();
        if ((uwr.isHttpError || uwr.isNetworkError))
        {
            Debug.Log(uwr.error);

            JObject job = new JObject();
            job.Add("code", "-10000");
            job.Add("message", uwr.error);
            String paramString = job.ToString(Newtonsoft.Json.Formatting.None, null);
            callback.Invoke(paramString);
        }
        else
        {
            if (uwr.responseCode == 200)//200表示接受成功
            {
                callback.Invoke(uwr.downloadHandler.text);
            }
        }
        uwr.Dispose();
    }