将目录中的多列拆分为一行

Question

你好呀

我正在处理一个乳胶文件，其中显示toc在一个multicols环境中，有一个自定义的“部分类似”元素，sobpart我想打破两列以在单列中显示它的行，这就是我目前所拥有的

\documentclass{article}

\usepackage{titlesec}
\usepackage{multicol}

% % Redefinition of ```\theHpart```
% \renewcommand\theHpart{\theHsobpart.\arabic{part}}

% sobpart
\newcounter{sobpart}
\renewcommand\thesobpart{\Roman{sobpart}}
\newcommand\sobpart[1]{
    % reset inner counter
    \setcounter{part}{0}
    \setcounter{section}{0}
    \setcounter{subsection}{0}
    \setcounter{subsubsection}{0}
    % add sobpart line
    \refstepcounter{sobpart}
    \part*{\thesobpart\hspace{1em}--\hspace{1em}#1}
%    % add to toc (old)
%    \addcontentsline{toc}{part}{
%         \end{multicols}  %% PW wrong place, see above
%        % \begin{multicols}{2}  %% PW wrong place, see below
%            \thesobpart\hspace{1em}--\hspace{1em}#1
%        % ]
%    }
    % add to toc (Peter's suggestion)
    \addtocontents{toc}{\end{multicols}}
    \addcontentsline{toc}{part}{\thesobpart\hspace{1em}--\hspace{1em}#1}
    \addtocontents{toc}{\begin{multicols}{2}}
}

\begin{document}


% Table of Contents
\renewcommand{\contentsname}{} % remove title

\begin{multicols}{2}[\section*{Content}]
    \tableofcontents
\end{multicols}

\part{part0.1}

\sobpart{sobpart1}

\part{part1.1}

\end{document}

---

添加到目录（旧）

我的想法是插入一个end/begin multicols但每当我注释掉该修改时我都会收到以下错误

./.build/test.toc:2: Missing } inserted.
<inserted text> 
}
l.2 ... I\hspace {1em}--\hspace {1em}sobpart1 ] }{1}
                                                  {}%
./.build/test.toc:2: Extra }, or forgotten \endgroup.
\l@part ...umwidth {\hss #2\kern -\p@ \kern \p@ }}
                                                  \par \nobreak \if@compatib...
l.2 ... I\hspace {1em}--\hspace {1em}sobpart1 ] }{1}
                                                  {}%
)
./test.tex:33: Missing } inserted.
<inserted text> 
}
l.33     \tableofcontents
                       
./test.tex:34: Extra }, or forgotten \endgroup.
\endmulticols ...le@items \color@endgroup \egroup 
                                                  \balance@columns \return@n...
l.34 \end{multicols}

---

编辑 1：重新定义\theHpart

尝试修改时theHpart出现以下错误

./test.tex:6: LaTeX Error: Command \theHpart undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.6 \renewcommand\theHpart
                        {\theHsobpart.\arabic{part}}

---

• theHpart编辑 1：添加了 Peter 的建议和重新定义命令的建议

Answer 1

您将multicols环境代码添加到了 ToC 的错误位置。

% multicoltocprob.tex  SE 622645

\documentclass{article}

\usepackage{multicol}

% sobpart
\newcounter{sobpart}
\renewcommand\thesobpart{\Roman{sobpart}}
\newcommand\sobpart[1]{
    % reset inner counter
    \setcounter{part}{0}
    \setcounter{section}{0}
    \setcounter{subsection}{0}
    \setcounter{subsubsection}{0}
    % add sobpart line
    \refstepcounter{sobpart}
    \part*{\thesobpart\hspace{1em}--\hspace{1em}#1}
    % add to toc
    \addtocontents{toc}{\end{multicols}}
    \addcontentsline{toc}{part}{
%         \end{multicols}  %% PW wrong place, see above
        % \begin{multicols}{2}  %% PW wrong place, see below
            \thesobpart\hspace{1em}--\hspace{1em}#1
        % ]
    }
    \addtocontents{toc}{\begin{multicols}{2}}
}

\begin{document}

% Table of Contents
\renewcommand{\contentsname}{} % remove title

\begin{multicols}{2}[\section*{Content}]
    \tableofcontents
\end{multicols}

\part{part0.1}

\sobpart{sobpart1}

\part{part1.1}

\end{document}

但是，由于某种原因，第二个\part没有出现在目录中。我将把这个问题留给你或其他人来解决。

编辑添加 *.toc 文件

\contentsline {part}{I\hspace {1em}part0.1}{1}{}%
\end {multicols}
\contentsline {part}{ I\hspace {1em}--\hspace {1em}sobpart1 }{1}{}%
\begin {multicols}{2}
\contentsline {part}{I\hspace {1em}part1.1}{1}{}%