SpriterNGUIColorHelper FindChildSpriteObject(Transform baseGO, ISpriterTimelineObject obj)
{
string spriteName = GetSpriteName(obj.targetFile.name);
//create the UISprite object
var t = baseGO.Find(spriteName);
if (t != null)
return t.GetComponent<SpriterNGUIColorHelper>();
var go = new GameObject(spriteName);
go.transform.parent = baseGO;
go.transform.localPosition = Vector3.zero;
AddSprite(obj, go);
var result = go.AddComponent<SpriterNGUIColorHelper>();
return result;
}