重置每个 Beamer 部分的帧数和总帧数

Question

我正在使用 LaTeX Beamer 帧计数器来显示

\insertframenumber/\inserttotalframenumber

...这意味着如果我的项目有 20 帧，幻灯片在第 16 帧，“16/20”被展示。

我的项目包含很长的部分（它们反映了书的章节），我希望每个部分的框架都有一个该部分本地的计数器。

例如，如果第 16 帧实际上在第 2 部分，而第 1 部分有 5 帧，那么它应该显示“11/15”。

也许有一个解决方案，但我对此表示怀疑，因为据我所知，\AtBeginSection没有好的计算方法。\inserttotalframenumber

如果有帮助的话，这里是我当前设置的 MWE（帧数较少）：

%%% Preamble %%%
\documentclass{beamer}
\usetheme{Antibes}
\usebeamercolor{dolphin}

% Make slide numbers appear, and they appear next to navigation
\addtobeamertemplate{navigation symbols}{}{%
    \usebeamerfont{footline}%
    \usebeamercolor[fg]{footline}%
    \hspace{1em}%
    \insertframenumber/\inserttotalframenumber
}

%%% Document %%%
\begin{document}

    \section{First section}
    
    \begin{frame}
        \frametitle{First}
        This frame should show ``1/2'', not ``1/5''.
    \end{frame}
    
    \begin{frame}
        \frametitle{Second}
        This frame should show ``2/2'', not ``2/5''.
    \end{frame}
    
    \section{Second section}
    
    \begin{frame}
        \frametitle{Third}
        This frame should show ``1/3'', not ``3/5''.
    \end{frame}
    
    \begin{frame}
        \frametitle{Fourth}
        This frame should show ``2/3'', not ``4/5''.
    \end{frame}
    
    \begin{frame}
        \frametitle{Fifth}
        This frame should show ``3/3'', not ``5/5''.
    \end{frame}

\end{document}

Answer 1

以下方法在.aux每个\section（包括文档末尾）处插入一个“标签”，以便捕获当前帧号。捕获的帧号（\section由于chngcntr) 随后插入页脚。

\documentclass{beamer}

\usetheme{Antibes}
\usebeamercolor{dolphin}

\usepackage{chngcntr}
\counterwithin{framenumber}{section}% Number frames within \section

% Make slide numbers appear, and they appear next to navigation
\addtobeamertemplate{navigation symbols}{}{%
  \usebeamerfont{footline}%
  \usebeamercolor[fg]{footline}%
  \hspace{1em}%
  \insertframenumber/\inserttotalframenumberbysection
}

\makeatletter
\let\oldsection\section
\renewcommand{\section}{% Store current \section's frame count
  \immediate\write\@auxout{\global\noexpand\@namedef{s@totalsectionframes-\arabic{section}}{\arabic{framenumber}}}%
  \oldsection
}
\AtEndDocument{% Store final \section's frame count
  \immediate\write\@auxout{\global\noexpand\@namedef{s@totalsectionframes-\arabic{section}}{\arabic{framenumber}}}%
}
\newcommand{\inserttotalframenumberbysection}{\csname s@totalsectionframes-\arabic{section}\endcsname}%
\makeatother

\begin{document}

\section{First section}

\begin{frame}
  \frametitle{First}
  This frame shows ``1/2'', not ``1/5''.
\end{frame}

\begin{frame}
  \frametitle{Second}
  This frame shows ``2/2'', not ``2/5''.
\end{frame}

\section{Second section}

\begin{frame}
  \frametitle{Third}
  This frame shows ``1/3'', not ``3/5''.
\end{frame}

\begin{frame}
  \frametitle{Fourth}
  This frame shows ``2/3'', not ``4/5''.
\end{frame}

\begin{frame}
  \frametitle{Fifth}
  This frame shows ``3/3'', not ``5/5''.
\end{frame}

\end{document}