在页面中间放置一个列表

Question

我有一个详细清单：

\begin{itemize}

    \item First item

    \item Second item

\end{itemize}

我想将此列表放在页面中央附近。但我仍然希望项目符号左对齐。我该怎么做？

Answer 1

如果你的列表必须跨越页面边界，那么你可以调整leftmargin并rightmargin提供enumitem- 将它们设置为相等的值：

\documentclass{article}
\usepackage{enumitem,lipsum}

\begin{document}
\lipsum[1]
\begin{itemize}
  \item First item
  \item Second item
\end{itemize}
\lipsum[2]
\begin{itemize}[leftmargin=.4\linewidth,rightmargin=.4\linewidth]
  \item First item
  \item Second item
\end{itemize}
\lipsum[3]
\end{document}

您可以根据列表项的宽度调整边距。

Answer 2

无需猜测：

\documentclass{article}
\usepackage{environ}
\usepackage{lipsum} % just for the example

\NewEnviron{centeritemize}{%
  \global\centeritemizewd=0pt
  \setbox0=\vbox{
    \renewcommand{\item}[1][]{\centeritemizeitem}
    \BODY\item\centeritemize
  }
  \global\advance\centeritemizewd\labelwidth
  \begin{center}
  \begin{minipage}{\centeritemizewd}
  \leftmargini=0pt
  \begin{itemize}
  \BODY
  \end{itemize}
  \end{minipage}
  \end{center}
}
\newdimen\centeritemizewd
\def\centeritemizeitem#1\item#2{%
  \setbox2=\hbox{#1}%
  \ifdim\wd2>\centeritemizewd
    \global\centeritemizewd=\wd2
  \fi
  \ifx#2\centeritemize
    % end the recursion
  \else
    \expandafter\centeritemizeitem
  \fi
}

\begin{document}
\lipsum*[2]
\begin{centeritemize}
  \item First item
  \item Second item
\end{centeritemize}
\lipsum[2]
\end{document}

限制：环境中不允许有空行centeritemize。

不要使用它。没有理由这么做。

Answer 3

\begin{center}
\begin{minipage}{.5\textwidth}
\begin{itemize}

    \item First item

    \item Second item

\end{itemize}
\end{minipage}
\end{center}

Answer 4

我能看到两种解决方案，emulatingitemize 环境加上一个tabular用于短项目的环境，或者加上一个tabulary环境，固定项目的最大宽度并在规定的宽度自动换行。它还允许\pars。

例子：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{array}
\usepackage{lipsum}
\usepackage{tabulary}
\usepackage[textwidth = 16cm, nomarginpar, showframe]{geometry}

\begin{document}
 \lipsum[2]
\begin{center}
 \begin{tabulary}{0.6\linewidth}{@{\textbullet\hskip\labelsep}L@{}}
  A very long first item, a very long first item, a very long first item, a very long first item, 
  \par
   To be continued… \\
  Second item \\
  A slightly longer third item
 \end{tabulary}
\end{center}

 \lipsum[3]
\begin{center}
 \begin{tabulary}{0.6\linewidth}{@{\textbullet\hskip\labelsep}L@{}}
  A not so long first item\\
  Second item \\
  A slightly longer third item
 \end{tabulary}
\end{center}

 \lipsum[4]
\begin{center}
 \begin{tabular}{@{\textbullet\hskip\labelsep}l@{}}
  A not so long first item\\
  Second item \\
  A slightly longer third item
 \end{tabular}
\end{center}

\end{document}