如何在 beamertemplate 中应用 \setbeamertemplate

Question

我正在使用 Beamer 模板，但有些东西让我感到困惑。如果我在括号环境中设置 Beamer 模板，我得到的结果与在另一个 Beamer 模板中设置并在框架内使用时得到的结果不同。

以下是我想做的 MWE：

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usetheme{metropolis}


\defbeamertemplate{background canvas}{section perso}{%
    \tikz[overlay,remember picture]{
        \fill[color=gray]  (1.,-1.) rectangle (15.,-8.);% 
    }%
}

\defbeamertemplate{frametitle}{section perso}[1][]{\insertframetitle}

\defbeamertemplate*{toc page}{perso}[1][]
{%
    \setbeamertemplate{background canvas}[section perso]%
    \setbeamertemplate{frametitle}[section perso]%
   \setbeamercolor{frametitle}{fg=gray}%
    \setbeamercolor{section in toc}{fg=white}%
    \setbeamercolor{subsection in toc}{fg=white}%
    \setbeamercolor{subsubsection in toc}{fg=white}%
}


\begin{document} %

   \begin{frame}{first}
      tata
   \end{frame}

{
   %% WORKING
    % \setbeamertemplate{frametitle}[section perso]
    % \setbeamertemplate{background canvas}[section perso]
   % \setbeamercolor{frametitle}{fg=gray}
    % \setbeamercolor{section in toc}{fg=white}
    % \setbeamercolor{subsection in toc}{fg=white}
    % \setbeamercolor{subsubsection in toc}{fg=white}

    % \setbeamertemplate{toc page}[perso] % NOT WORKING
    % \setbeamertemplate*{toc page}[perso] % NOT WORKING
    \begin{frame}{TOC}
        \usebeamertemplate{toc page}%[perso] % NOT WORKING
      % \usebeamertemplate*{toc page}%[perso] % NOT WORKING
      % \usebeamertemplate**{toc page}%[perso] % NOT WORKING
      % \usebeamertemplate***{toc page}%[perso] % NOT WORKING
      % \setbeamertemplate{toc page}[perso] % NOT WORKING
        % \setbeamertemplate*{toc page}[perso] % NOT WORKING
      \begin{columns}
        \column{0.30\textwidth}
        \column{0.70\textwidth}
            test
            \tableofcontents
        \end{columns}
    \end{frame}

    \begin{frame}{title}
        toto
    \end{frame}
} 
 
\section{Chapiter}
\subsection{sub sec}

\end{document}

所以我的问题是如何设置一个仅为某些幻灯片调用其他 beamer 模板的 beamer 模板？

Answer 1

如果你发明了一个新的模板（如toc page），而该模板不被 beamer 使用，那么仅仅设置它是不够的，你还必须实际使用该模板：

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usetheme{moloch}% modern fork of the metropolis theme

\defbeamertemplate{background canvas}{section perso}{%
    \tikz[overlay,remember picture]{
        \fill[color=gray]  (1.,-1.) rectangle (15.,-8.);% 
    }%
}

\defbeamertemplate{frametitle}{section perso}[1][]{\insertframetitle}

\defbeamertemplate*{toc page}{perso}[1][]
{%
    \setbeamertemplate{background canvas}[section perso]%
    \setbeamertemplate{frametitle}[section perso]%
   \setbeamercolor{frametitle}{fg=gray}%
    \setbeamercolor{section in toc}{fg=white}%
    \setbeamercolor{subsection in toc}{fg=white}%
    \setbeamercolor{subsubsection in toc}{fg=white}%
}

\begin{document} %

   \begin{frame}{first}
      tata
   \end{frame}

{
     \setbeamertemplate{toc page}[perso] 
     \usebeamertemplate{toc page}
    \begin{frame}{TOC}
      \begin{columns}
        \column{0.30\textwidth}
        \column{0.70\textwidth}
            test
            \tableofcontents
        \end{columns}
    \end{frame}

    \begin{frame}{title}
        toto
    \end{frame}
} 
 
\section{Chapiter}
\subsection{sub sec}

\end{document}