# beamer slide number with footer

I am using the warsaw theme and I need to have the footer with frame number the header of the code is:

\mode<presentation>
{
\usetheme{Warsaw}
\usecolortheme{crane}
\setbeamercovered{transparent}
%  \setbeamertemplate{footline}[frame number]
}

If I uncomment the \setbeamertemplate{footline}[frame number] it would cause the footer to disappear. I am quoting the paragraph from this site:

To get slide numbers in the footer (next to the title of the presentation) replace your \title{} command with this:

In this case, we must provide enough value to \hspace to align the slide number. Is there any better way?

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