华沙主题脚注中的两行标题

Question

我的作品标题很大，但是当我使用华沙主题时，工具栏上只显示一半！有什么方法可以纠正这个问题，比如让它变成双线或者别的什么？

\documentclass{beamer}
\usetheme{Warsaw}

\title{This title is large and does not fit into the bar down for each page how can i fit it there ? }
\author{Anonymous}
\institute{ShareLaTeX}
\date{2014}

\begin{document}
\frame{\titlepage}
\begin{frame}
\frametitle{Sample frame title}
This is a text in first frame. This is a text in first frame. This is a text in first frame.
\end{frame}
\end{document}

Answer 1

我个人认为@Johannes 的建议使用简短的标题更好，但如果你坚持用两行：

\documentclass{beamer}
\usetheme{Warsaw}

\title{This title is large and does not fit into the bar down for each page how can i fit it there ? }
\author{Anonymous}
\institute{ShareLaTeX}
\date{2014}

\setbeamertemplate{footline}{%
  \leavevmode%
  \hbox{\begin{beamercolorbox}[wd=.5\paperwidth,ht=4.5ex,dp=2.125ex,leftskip=.3cm plus1fill,rightskip=.3cm]{author in head/foot}%
    \usebeamerfont{author in head/foot}\insertshortauthor
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.5\paperwidth,ht=4.5ex,dp=2.125ex,leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}%
    \usebeamerfont{title in head/foot}
    \parbox{.45\paperwidth}{\inserttitle}
  \end{beamercolorbox}}%
  \vskip0pt%
}

\begin{document}
\frame{\titlepage}
\begin{frame}
\frametitle{Sample frame title}
This is a text in first frame. This is a text in first frame. This is a text in first frame.
\end{frame}
\end{document}