我想重新定义\includegraphics
,以便它在环境中照常工作,并在环境figure
之外自动居中。figure
这是我的尝试:
\documentclass{article}
\usepackage{graphicx}
\makeatletter
\let\old@includegraphics\includegraphics
\renewcommand\includegraphics[2][]{
\ifx\@currenvir\@figureenvname
\old@includegraphics[#1]{#2}
\else
\begin{center}\old@includegraphics[#1]{#2}\end{center}
\fi}
\newcommand*\@figureenvname{figure}
\makeatother
\begin{document}
\includegraphics[width=0.4\textwidth]{example-image-a}
\begin{figure}[ht]
\includegraphics[width=0.4\textwidth]{example-image-a}
\end{figure}
\end{document}
这按预期工作(第一个图形居中,第二个图形左对齐)。
但是一旦我在中使用这个命令beamer
,它就不再起作用:
\documentclass{beamer}
\usepackage{graphicx}
\makeatletter
\let\old@includegraphics\includegraphics
\renewcommand\includegraphics[2][]{
\ifx\@currenvir\@figureenvname
\old@includegraphics[#1]{#2}
\else
\begin{center}\old@includegraphics[#1]{#2}\end{center}
\fi}
\newcommand*\@figureenvname{figure}
\makeatother
\begin{document}
\begin{frame}
\includegraphics[width=0.4\textwidth]{example-image-a}
\begin{figure}[ht]
\includegraphics[width=0.4\textwidth]{example-image-a}
\end{figure}
\end{frame}
\end{document}
两个图形都居中。问题出在哪里?我该如何修复?