使用beamer，如果我定义了 ，\newenvironment以 开始并结束frame，则后续note会失败。
为什么？如何解决？
在下面的最小示例中（根据评论而更改），框架始终可以编译，但在使用环境时注释会失败\myframe。
\documentclass{beamer}
\setbeameroption{show notes}
\newenvironment{myframe}%
{\begin{frame}[environment=myframe]\frametitle{SomeTitle} SomeContent}
{\end{frame}}
\begin{document}
%\begin{frame} Test \end{frame} % works
\begin{myframe} Test \end{myframe} % fails when compiling the note
\note[itemize]
{
\item Note test
}
\end{document}
错误信息是
! Undefined control sequence.
\\itemize ...ix item}##1}}}}} \fi \beamer@cramped
\raggedright
\beamer@first...
输出pdflatex为
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=pdflatex)
restricted \write18 enabled.
entering extended mode
(./test.tex
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For additional information on amsmath, use the `?' option.
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! Undefined control sequence.
\\itemize ...ix item}##1}}}}} \fi \beamer@cramped
\raggedright \beamer@first...
l.15 }
?
! Emergency stop.
\\itemize ...ix item}##1}}}}} \fi \beamer@cramped
\raggedright \beamer@first...
l.15 }
! ==> Fatal error occurred, no output PDF file produced!
Transcript written on test.log.
答案1
\beamer@cramped在序言中初始化使用
\makeatletter
\def\beamer@cramped{}
\makeatother
对于您的示例，使用它作为
\documentclass{beamer}
\setbeameroption{show notes}
\newenvironment{myframe}%
{\begin{frame}[environment=myframe]\frametitle{SomeTitle} SomeContent}
{\end{frame}}
\makeatletter
\def\beamer@cramped{}
\makeatother
\begin{document}
%\begin{frame} Test \end{frame} % works
\begin{myframe} Test \end{myframe} % fails when compiling the note
\note[itemize]
{
\item Note test
}
\end{document}
答案2
如果要我猜想为什么会发生这种情况，那一定是因为 Beamer 寻找\end{frame}框架脆弱性的方式等等。Beamer 总体上不太喜欢新框架。
不过我注意到，如果你的环境前面有一个常规框架，它仍然可以工作。该框架甚至可以是标题框架。
\documentclass{beamer}
\setbeameroption{show notes}
\newenvironment{myframe}
{\begin{frame}[environment=myframe]\frametitle{SomeTitle} SomeContent}
{\end{frame}}
\begin{document}
\frame{\titlepage}
\begin{myframe}
Test
\end{myframe}
\note[itemize]
{
\item Note test
}
\end{document}