Beamer：是否在图形内覆盖区域？

Question

在我的Beamer演示中，我想在人物环境中动态切换图像。更准确地说，我的图形包含9个子浮点数，以3x3表示，并且在演示过程中，每个浮点数应在两个图像之间切换。

为了避免不同元素之间的“倾斜”，我认为在每个子浮点数内使用一个覆盖区域是一个好主意。

可悲的是，在图形环境中使用时，overlayarea的表现似乎很奇怪：我放入其中的所有东西都显示为outside overlayarea ??

这是一个非常简短的示例：

\documentclass[9pt, aspectratio=43]{beamer}

\usepackage [francais]{babel}
\usepackage [T1]{fontenc}
\usepackage [utf8]{inputenc}

\usepackage[position=top]{subfig}
\usepackage{pdfpages}


\begin{document}

\begin{frame}
%% This works fine : 123 appears INSIDE the overlayarea
\fbox{\begin{overlayarea}{3cm}{2cm}
\fbox{123}
\end{overlayarea}}

%% This looks odd : 456 appears OUTSIDE the overlayarea
\begin{figure}
\fbox{\begin{overlayarea}{3cm}{2cm}
\fbox{456}
\end{overlayarea}}
\end{figure}

\end{frame}

\end{document}

也许我滥用了这个环境？

非常感谢：）

BR

甜甜圈

Answer 1

快速解决方法：在固定高度的微型页面中扭曲子图像：

\documentclass[9pt, aspectratio=43]{beamer}

\begin{document}

\begin{frame}

\begin{figure}
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%
\hfill
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%
\hfill
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%

\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%%
\end{minipage}%
\hfill
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%
\hfill
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%

\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%
\hfill
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%
\hfill
\begin{minipage}[c][.3\textheight][c]{.3\textwidth}
\centering
\includegraphics<1>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-9x16}%
\includegraphics<2>[width=\textwidth,height=.3\textheight,keepaspectratio]{example-image-duck}%
\end{minipage}%
\end{figure}

\end{frame}

\end{document}