小页面中的长标题未居中？

Question

梅威瑟：

\documentclass{article}
\usepackage[stable]{footmisc}
\usepackage{footnote}
\usepackage{caption}
\usepackage{hyperref}
\usepackage{listings}\usepackage{genmpage}

\begin{document}
    \begin{minipage}{\linewidth}
        \centering
        \begin{lstlisting}[frame=single]
                mycode;
        \end{lstlisting}
        \captionof{figure}{Short.}
    \end{minipage}

    \medskip

    \begin{minipage}{\linewidth}
        \centering
        \begin{lstlisting}[frame=single]
                mycode;
        \end{lstlisting}
        \captionof{figure}{Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words.}
    \end{minipage}
\end{document}

在第一个例子中，标题完美地居中对齐。然而，在第二个例子中，它根本没有居中对齐。尽管标题上有一个 \centering，但它看起来像是左对齐的。

编辑：

使用图形来封装列表会导致小页面混乱。

\documentclass{article}
\usepackage[stable]{footmisc}
\usepackage{footnote}
\usepackage[justification=centering]{caption}
\usepackage{hyperref}
\usepackage{listings}
\usepackage{genmpage}
\usepackage{graphicx}


\begin{document}


    \begin{minipage}{\linewidth}
        \centering
        \includegraphics[width=\linewidth]{example-image-a.jpg}
        \captionof{figure}{Figure at \#1.}
    \end{minipage}


     \begin{figure}
        \begin{lstlisting}[frame=single]
            Figure at #2;
        \end{lstlisting}
        \caption{Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words.}
    \end{figure}

    \begin{figure}
        \begin{lstlisting}[frame=single]
            Figure at #3;
        \end{lstlisting}
        \caption{Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words.}
    \end{figure}



\end{document}

图片使用 minipages 的原理来源于此：http://tex.stackexchange.com/a/54449/161008

列表中图形的使用源自此处： https://tex.stackexchange.com/a/19668/161008

Answer 1

这是 caption 包的默认行为。如果标题少于一行，则居中，否则两端对齐。

如果您希望所有字幕都居中，您可以使用 修改默认行为justification=centering。

\documentclass{article}
\usepackage[stable]{footmisc}
\usepackage{footnote}
\usepackage[justification=centering]{caption}
\usepackage{listings}
\usepackage{genmpage}
\usepackage{hyperref}

\renewcommand{\lstlistingname}{Figure}

\begin{document}


    \begin{lstlisting}[frame=single,caption={Short},captionpos=b]
            mycode;
    \end{lstlisting}

  \medskip

    \begin{lstlisting}[frame=single,caption={Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words. Multiple Words.},captionpos=b]
            mycode;
    \end{lstlisting}

\end{document}