private void OnGUI()
    {
        DrawOptionBar();
        UpdateAssetTree();

        //绘制Treeview
        if (m_AssetTreeView != null)
        {
            m_AssetTreeView.OnGUI(new Rect(0, toolbarGUIStyle.fixedHeight, position.width, position.height - toolbarGUIStyle.fixedHeight));
        }
    }
 private void OnGUI()
 {
     InitGUIStyleIfNeeded();
     DrawOptionBar();
     UpdateAssetTree();
     if (_assetTreeView != null)
     {
         //绘制Treeview
         _assetTreeView.OnGUI(new Rect(0, _toolbarGUIStyle.fixedHeight, position.width, position.height - _toolbarGUIStyle.fixedHeight));
     }
 }