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如何在列内创建框（Beamer）？

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如何在列内创建框（Beamer）？

我需要有三列，并且每列中的文本都应包含在一个框中。下面是我的代码，但它不起作用：

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{calc}

\newcommand{\mytikzmark}[1]{\tikz[overlay,remember picture] \node[baseline] (#1) {};}

\begin{document}
\begin{frame}{if/else/elseif}
\begin{columns}[T]
\fcolorbox{black}{white}{

\begin{column}{.3\textwidth}
% Your text here
\textcolor{orange}{IF}

\textcolor{blue}{if} cond

\hspace{10 pt}commands

\textcolor{blue}{end}

\end{column}

}
\begin{column}{.3\textwidth}
% Your text here
\textcolor{orange}{ELSE}

\textcolor{blue}{if} cond

\hspace{10 pt}commands1

\textcolor{blue}{else} 

\hspace{10 pt}commands2

\textcolor{blue}{end}

\end{column}

\begin{column}{.3\textwidth}
% Your text here
\textcolor{orange}{ELSEIF}
\textcolor{orange}{ELSE}

\textcolor{blue}{if} cond

\hspace{10 pt}commands1

\textcolor{blue}{elseif} cond2

\hspace{10 pt}commands2

\textcolor{blue}{else} 

\hspace{10 pt}commands3

\textcolor{blue}{end}

\end{column}

  \end{columns}
\end{frame}
\end{document}

这是我得到的 在此处输入图片描述 这是我所希望得到的 在此处输入图片描述

答案1

如果您愿意将装箱工作交给，我可以为该问题提供解决方案。在环境中tcolorbox创建三个宽度相等的盒子。盒子属性由 选项设置：\tcbitemtcbitemizetcbitemize

\documentclass{beamer}
\usepackage[skins,raster]{tcolorbox}

\begin{document}


\begin{frame}{if/else/elseif}
  \begin{tcbitemize}[enhanced,colback=white,colframe=black,size=fbox,
    sharp corners,raster columns=3,raster valign=top,
    % raster before skip=0pt,raster after skip=0pt, % glue before/after
    ]

  \tcbitem
    % Your text here
    {\centering\textcolor{orange}{IF}\par}

    \textcolor{blue}{if} cond

    \hspace{10 pt}commands

    \textcolor{blue}{end}

  \tcbitem
    % Your text here
    {\centering\textcolor{orange}{ELSE}\par}

    \textcolor{blue}{if} cond

    \hspace{10 pt}commands1

    \textcolor{blue}{else}

    \hspace{10 pt}commands2

    \textcolor{blue}{end}

  \tcbitem
    % Your text here
    {\centering\textcolor{orange}{ELSEIF}\par}

    \textcolor{blue}{if} cond

    \hspace{10 pt}commands1

    \textcolor{blue}{elseif} cond2

    \hspace{10 pt}commands2

    \textcolor{blue}{else}

    \hspace{10 pt}commands3

    \textcolor{blue}{end}

  \end{tcbitemize}
\end{frame}

\end{document}

结果是：

在此处输入图片描述

如果使用标记，可以将其放在框内。例如：

\documentclass{beamer}
\usepackage[skins,raster]{tcolorbox}

\begin{document}


\begin{frame}{if/else/elseif}
  \begin{tcbitemize}[enhanced,colback=white,colframe=black,size=fbox,
    sharp corners,raster columns=3,raster valign=top,
    % raster before skip=0pt,raster after skip=0pt, % glue before/after
    ]

  \tcbitem
    % Your text here
    {\centering\textcolor{orange}{IF}\par}

    \textcolor{blue}{if}\tikz[remember picture,baseline=(a.base)] \node (a) {cond};

    \hspace{10 pt}commands

    \textcolor{blue}{end}
%
  \begin{tikzpicture}[remember picture,overlay]
  \node[align=left,font=\small] (x) at (1,-1.2)
    {Conditional statement:\\ evaluates to true or false};
  \draw[->] (x)--(a);
  \end{tikzpicture}%
%
  \tcbitem
    % Your text here
    {\centering\textcolor{orange}{ELSE}\par}

    \textcolor{blue}{if} cond

    \hspace{10 pt}commands1

    \textcolor{blue}{else}

    \hspace{10 pt}commands2

    \textcolor{blue}{end}

  \tcbitem
    % Your text here
    {\centering\textcolor{orange}{ELSEIF}\par}

    \textcolor{blue}{if} cond

    \hspace{10 pt}commands1

    \textcolor{blue}{elseif} cond2

    \hspace{10 pt}commands2

    \textcolor{blue}{else}

    \hspace{10 pt}commands3

    \textcolor{blue}{end}

  \end{tcbitemize}

\end{frame}

\end{document}

在此处输入图片描述

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