如何在 metropolis/mtheme 中的 beamer 幻灯片末尾插入水平条作为脚注？

Question

在 beamer 幻灯片中，使用 mtheme/都会主题，很难在幻灯片底部创建一个小的水平条来显示作者姓名或为每张幻灯片插入一些不同的文本。

答案是存在的这里。但是页码是从标题页开始的。如何让页码从标题页后的幻灯片开始？如果能够在脚注周围创建一个条或某个框，那就太好了。许多不同的主题默认都存在这样的条，例如 Beamer 的马德里主题。

Answer 1

基于https://tex.stackexchange.com/a/388811/36296

\documentclass{beamer}

\usetheme{moloch}% modern fork of the metropolis theme

\author{names}
\title{text}


\makeatletter
\def\beamer@autobreakframebox{%
  \global\setbox\beamer@splitbox=\box\voidb@x%
  \ifbeamer@autobreak%
    % Ok, frame was overful -> split it!
    \setbox\@tempboxa=\vsplit\beamer@framebox to\beamer@autobreakfactor\textheight%
    \global\setbox\beamer@splitbox=\box\beamer@framebox%
    \@tempdima=\ht\beamer@splitbox%
    \ifdim\@tempdima<\beamer@autobreaklastheight%
      \global\beamer@autobreaklastheight=\@tempdima\relax%
    \else%
      \setbox\@tempboxa=\vbox{\unvbox\@tempboxa\unvbox\beamer@splitbox}%
      \global\setbox\beamer@splitbox=\box\voidb@x%
    \fi%
    \setbox\beamer@framebox=\vbox to\textheight{\unvbox\@tempboxa%
      \vskip\beamer@framebottomskipautobreak%
      \ifvoid\beamer@splitbox%
              \begin{beamercolorbox}[wd=\paperwidth,left]{footnote}
                    \usebeamerfont{footnote}%   
                    \ifvoid\beamer@footins%
                        \vskip\baselineskip%
                    \else%
                        \unvbox \beamer@footins%
                        \global\setbox\beamer@footins=\box\voidb@x%
                    \fi%
                    
                    \vskip-1.4\baselineskip%
                    \hspace{.5\paperwidth}%
                \parbox{.48\paperwidth}{%
                    \usebeamerfont{footnote}\strut\insertshortauthor\hfill\insertframenumber\quad%
                }%
              \end{beamercolorbox}%
      \fi%
      \beamer@exitcode%
    }%
  \else%
    \setbox\beamer@framebox=\vbox to\textheight{\unvbox\beamer@framebox%
      \vskip\beamer@framebottomskip%
              \begin{beamercolorbox}[wd=\paperwidth,left]{footnote}
                    \usebeamerfont{footnote}%   
                    \ifvoid\beamer@footins%
                        \vskip\baselineskip%
                    \else%
                        \unvbox \beamer@footins%
                        \global\setbox\beamer@footins=\box\voidb@x%
                    \fi%
                    
                    \vskip-1.4\baselineskip%
                    \hspace{.5\paperwidth}%
                \parbox{.48\paperwidth}{%
                    \usebeamerfont{footnote}\strut\insertshortauthor\hfill\insertframenumber\quad%
                }%
              \end{beamercolorbox}%
      \beamer@exitcode}%
    \global\setbox\beamer@footins=\box\voidb@x%
  \fi%
  }
\makeatother

\setbeamerfont{footnote}{size=\scriptsize}
\setbeamertemplate{footline}{}
\setbeamercolor{footnote}{fg=white,bg=mDarkTeal}

\usepackage[style=authoryear]{biblatex}
\addbibresource{biblatex-examples.bib}

\begin{document}

\begin{frame}[plain,noframenumbering]
    \titlepage
\end{frame} 

\begin{frame}
   test
\end{frame} 

\begin{frame}
   test\footcite{bertram}
   
   text\footcite{angenendt}
\end{frame} 

\begin{frame}
    text\footcite{angenendt}
\end{frame} 

\begin{frame}
\printbibliography
\end{frame}

\end{document}