public static UIImageView GetBorderImage(this UINavigationBar navigationBar)
{
UIImageView borderImage = null;
foreach (var view in navigationBar.TraverseTree())
{
borderImage = view as UIImageView;
if (borderImage == null)
{
continue;
}
if (borderImage.Bounds.Size.Height <= 1.0)
{
break;
}
borderImage = null;
}
return(borderImage);
}