我想将 beamer 类中每帧的脚注计数器重置（即更新）为 0（或 1）。这样脚注计数器在每个帧的开头都从 1 开始。
这是我的代码；
\documentclass{beamer}
\usetheme{Copenhagen}
\usecolortheme{beaver}
\usepackage[utf8]{inputenc}
%%% Footnotes
\makeatletter
\def\@fnsymbol#1{\ensuremath{\ifcase#1\or
*\or **\or ***\or
\star\or\star\star\or\star\star\star\or
\dagger\or\dagger\dagger\or\dagger\dagger\dagger
\else\@ctrerr\fi}}
\renewcommand{\thefootnote}{\fnsymbol{footnote}}
\makeatother
%\counterwithin*{footnote}{frame}
\begin{document}
%
\begin{frame}
\frametitle{A frame}
Today's digital economy is built on intricate chians of basic algorithms.
And I want to put a footnote here\footnote{This is a description of the word `here'} and there\footnote{This is another description. Note that the footnotemark is not the standard one. I altered it in preamble.}
\end{frame}
%
\begin{frame}
\frametitle{Another frame}
This is another frame.
And I want to put another footnote here\footnote{This is the third footnote of the entire document, but the first of this frame. So I want to denote the footnotemark as the first one instead of third one.}.
\end{frame}
\end{document}
我尝试过
\counterwithin*{footnote}{frame}
但没有成功，出现以下错误信息
! LaTeX Error: No counter 'frame' defined.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.17 \counterwithin*{footnote}{frame}
?
和
\makeatletter
\@addtoreset{footnote}{frame}
\makeatother
也不起作用。
你能帮助我吗？提前谢谢您。
答案1
有了它\AtBeginEnvironment，它就可以工作了，因此只需添加以下两行：
\AtBeginEnvironment{frame}{\setcounter{footnote}{0}}
