private void PerformDownload(string url, System.Action callback, string downloadMessage) { Debug.Log("Downloading from URL: " + url); mIsDownloading = true; mHasDownloadCompleted = false; mOnDownloadCompleteAction = callback; EditorUtility.DisplayProgressBar("Downloading...", downloadMessage, 0.5f); WWW www = new WWW(url); ContinuationManager.Run(() => www.isDone, () => { mHasDownloadCompleted = true; if (!string.IsNullOrEmpty(www.error)) { Debug.LogError("WWW failed: " + www.error); } else { mDownloadedBytes = www.bytes; } }); }