多列对齐问题中的目录

Question

在我的报告中，我想有一个简短的目录，因此我使用 multicol 将其打印成两列以节省空间。但顶部的对齐方式如图所示。

我更喜欢第二列的第一行与第一列的目录中的第一个条目对齐。总之，第 3 节应移至第 2 节下方的左列，第 4 节应与第 1 节保持在同一行。

我找到了一些解决方案，但它们在某种程度上非常手动，你必须自己编写哪个部分出现在哪一列。到目前为止，这里一切都是自动发生的 :)

我迄今为止的代码：

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
%%%%%% additional packages
\usepackage{multicol}
\usepackage{etoolbox}
%%%%%%

\setcounter{tocdepth}{1} %set depth of printed table of contets.

\makeatletter
\patchcmd{\l@section}
  {\hfil}
  {\leaders\hbox{\normalfont$\m@th\mkern \@dotsep mu\hbox{.}\mkern \@dotsep     mu$}\hfill}
  {}{}
\makeatother %print dots in sections in toc.

\begin{document}


\begin{multicols}{2}
\tableofcontents
\end{multicols}


\section{Introduction}%%%%%%%%%%Introduction
\subsection{bla}
\subsubsection{blabla}

\section{Approach}%%%%%%%%%%Approach
\subsection{bla}
\subsubsection{blabla}

\section{Experimental results}%%%%%%%%%%Experimental results
\subsection{bla}
\subsubsection{blabla}

\section{Discussion}%%%%%%%%%%Discussion
\subsection{bla}
\subsubsection{blabla}

\section{Summary}%%%%%%%%%%Summary
\subsection{bla}
\subsubsection{blabla}


\end{document}

非常感谢，SemtexB

Answer 1

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
%%%%%% additional packages
\usepackage{multicol,etoolbox}
%%%%%%

\setcounter{tocdepth}{2} %set depth of printed table of contets.

\makeatletter


\patchcmd{\l@section}
  {\hfil}
  {\leaders\hbox{\normalfont$\m@th\mkern \@dotsep mu\hbox{.}\mkern \@dotsep     mu$}\hfill}
  {}{}

\renewcommand\tableofcontents{%
    \begin{multicols}{2}[\section*{\contentsname
        \@mkboth{%
           \MakeUppercase\contentsname}{\MakeUppercase\contentsname}}]%
    \@starttoc{toc}%
    \end{multicols}%
    }

\makeatother %print dots in sections in toc.

\begin{document}


\tableofcontents


\section{zz}
aa
\section{bbbb}
\subsection{xgxgxgxg}
aaa
\subsection{xgxgxgxg}
aaa
\subsection{xgxgxgxg}
aaa
\subsection{xgxgxgxg}


\end{document}

Answer 2

一个更短但更隐蔽的解决方案：

\documentclass{article}
\usepackage{multicol}

\AtBeginDocument{\addtocontents{toc}{\protect\begin{multicols}{2}}}
\AtEndDocument{\addtocontents{toc}{\protect\end{multicols}}}

\begin{document}
\tableofcontents
\section{fee}
\subsection{foo}
\subsection{bar}
\section{fie}
\section{fo}
\section{fum}
\end{document}

Answer 3

这是一个老话题，但我遇到了同样的问题，并找到了一个我认为更简单的解决方案，所以...只需删除目录标题，然后在 \tableofcontents 之前手动添加它。您的代码将如下所示：

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
%%%%%% additional packages
\usepackage{multicol}
\usepackage{etoolbox}
%%%%%%

\setcounter{tocdepth}{1} %set depth of printed table of contets.

\makeatletter
\patchcmd{\l@section}
  {\hfil}
  {\leaders\hbox{\normalfont$\m@th\mkern \@dotsep mu\hbox{.}\mkern \@dotsep     mu$}\hfill}
  {}{}
\makeatother %print dots in sections in toc.

\begin{document}

\section*{Contents} % As suggested by TeXnician
\renewcommand{\contentsname}{}

\begin{multicols}{2}
\tableofcontents
\end{multicols}


\section{Introduction}%%%%%%%%%%Introduction
\subsection{bla}
\subsubsection{blabla}

\section{Approach}%%%%%%%%%%Approach
\subsection{bla}
\subsubsection{blabla}

\section{Experimental results}%%%%%%%%%%Experimental results
\subsection{bla}
\subsubsection{blabla}

\section{Discussion}%%%%%%%%%%Discussion
\subsection{bla}
\subsubsection{blabla}

\section{Summary}%%%%%%%%%%Summary
\subsection{bla}
\subsubsection{blabla}


\end{document}