我正在尝试使用 KOMA-Script 创建精美的章节标题，我注意到的一件事是目录始终编号为 0，因为我正在访问章节计数器。有没有办法只对第 1 章及以上章节执行此操作？即，如果是\thechapter > 0则访问它，否则不访问。
下面是一个 MWE，希望它能描述我的意思：
\documentclass{scrreprt}
\KOMAoption{appendixprefix}{false}
\KOMAoption{chapterprefix}{false}
\KOMAoption{cleardoublepage}{empty}
\KOMAoption{DIV}{12}
\KOMAoption{draft}{false}
\KOMAoption{fontsize}{12pt}
\KOMAoption{headings}{big}
\KOMAoption{paper}{a4}
\KOMAoption{parskip}{half}
\KOMAoption{toc}{indent,bibliography}
\KOMAoption{twoside}{semi}
\KOMAoption{captions}{signature}
\KOMAoption{titlepage}{false}
\KOMAoption{abstract}{true}
% KOMA is complaining and apparently this fixes it =/
\usepackage{scrhack}
\usepackage{listings}
% Split document into multiple parts
\usepackage{subfiles}
% e-TeX tools
\usepackage{etoolbox}
% Colours - put this before typography so additional named colours can be defined.
\usepackage{xcolor}
\definecolor{rmitred}{HTML}{CF102F}
%% Typography Settings
\usepackage{microtype}
\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}
\usepackage{xunicode}
\usepackage{xltxtra}
\makeatletter
\setkomafont{chapter}{\let\@hangfrom\chapterhang\let\raggedsection\raggedright\fontsize{28}{28}\mdseries}
\makeatother
\newbox\chapternumberbox
\newbox\chapternamebox
\newcommand{\chapterhang}[2]{%
\savebox\chapternumberbox{\fontsize{96}{96}\sffamily\color{rmitred}\arabic{chapter}}
\raisebox{0em}{\usebox\chapternumberbox}
\parbox[b][1\height][b]{\dimexpr\linewidth-\wd\chapternumberbox}{\raggedright #2}
}
\begin{document}
\tableofcontents
\chapter{Introduction}
\label{ch:introduction}
\section{A Section}
This is an introduction
\chapter{Improving Chapter Styling}
\section{Why}
Why do we want to do this thing? Because fancy.
\section{How}
How do we do this thing?
\chapter{The Second Chapter}
Some important things
\chapter{The Third Chapter}
Lorem ipsum etc
\chapter{Conclusion}
Lorem ipsum etc
\end{document}
答案1
除了缺少字体功能外，代码
\ifnum\value{chapter} > 0
\savebox{...}% with \arabic{chapter}
\else
\savebox{...}% Without \arabic{chapter}
\fi
对我有用。
关于计数器值的条件可以用以下方式完成\ifnum\value{countername} .... \if
\documentclass{scrreprt}
\KOMAoption{appendixprefix}{false}
\KOMAoption{chapterprefix}{false}
\KOMAoption{cleardoublepage}{empty}
\KOMAoption{DIV}{12}
\KOMAoption{draft}{false}
\KOMAoption{fontsize}{12pt}
\KOMAoption{headings}{big}
\KOMAoption{paper}{a4}
\KOMAoption{parskip}{half}
\KOMAoption{toc}{indent,bibliography}
\KOMAoption{twoside}{semi}
\KOMAoption{captions}{signature}
\KOMAoption{titlepage}{false}
\KOMAoption{abstract}{true}
% KOMA is complaining and apparently this fixes it =/
\usepackage{scrhack}
\usepackage{listings}
% Split document into multiple parts
\usepackage{subfiles}
% e-TeX tools
\usepackage{etoolbox}
% Colours - put this before typography so additional named colours can be defined.
\usepackage{xcolor}
\definecolor{rmitred}{HTML}{CF102F}
%% Typography Settings
\usepackage{microtype}
\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}
\usepackage{xunicode}
\usepackage{xltxtra}
\makeatletter
\setkomafont{chapter}{\let\@hangfrom\chapterhang\let\raggedsection\raggedright\fontsize{28}{28}\mdseries}
\makeatother
\newbox\chapternumberbox
\newbox\chapternamebox
\newcommand{\chapterhang}[2]{%
% \savebox\chapternumberbox{\fontsize{96}{96}\rmitfont\color{rmitred}\arabic{chapter}}
\ifnum\value{chapter}>0
\savebox\chapternumberbox{\fontsize{96}{96}\color{rmitred}\arabic{chapter}}%
\raisebox{0em}{\usebox\chapternumberbox}
\else
\savebox\chapternumberbox{\fontsize{96}{96}\color{rmitred}}
\raisebox{0em}{\usebox\chapternumberbox}%
\fi
\parbox[b][1\height][b]{\dimexpr\linewidth-\wd\chapternumberbox}{\raggedright #2}%
}
\begin{document}
\tableofcontents
\chapter{Introduction}
\label{ch:introduction}
\section{A Section}
This is an introduction
\chapter{Improving Chapter Styling}
\section{Why}
Why do we want to do this thing? Because fancy.
\section{How}
How do we do this thing?
\chapter{The Second Chapter}
Some important things
\chapter{The Third Chapter}
Lorem ipsum etc
\chapter{Conclusion}
Lorem ipsum etc
\end{document}
答案2
请注意\addtokomafont和\setkomafont仅应用于切换字体属性。
这里有一个重新定义的建议\chapterformat（\chapterlinesformat需要 KOMA-Script 版本 3.19a 或更新版本），它也适用于文档内的未编号章节。
\addtokomafont{chapter}{\fontsize{28}{28}\selectfont\mdseries}
\renewcommand\chapterformat{%
{\fontsize{96}{96}\selectfont\textcolor{rmitred}{\thechapter}}\ }
\newbox\chapternumberbox
\renewcommand\chapterlinesformat[3]{%
\ifstr{#2}{}{
\parbox[b]{\textwidth}{\raggedright#3}%
}{%
\savebox\chapternumberbox{#2}%
\usebox\chapternumberbox%
\parbox[b]{\dimexpr\textwidth-\wd\chapternumberbox\relax}{\raggedright#3}%
}\par\nobreak
}
代码：
\documentclass{scrreprt}[2015/10/03]
\KOMAoption{appendixprefix}{false}
\KOMAoption{chapterprefix}{false}
\KOMAoption{cleardoublepage}{empty}
\KOMAoption{DIV}{12}
\KOMAoption{draft}{false}
\KOMAoption{fontsize}{12pt}
\KOMAoption{headings}{big}
\KOMAoption{paper}{a4}
\KOMAoption{parskip}{half}
\KOMAoption{toc}{indent,bibliography}
\KOMAoption{twoside}{semi}
\KOMAoption{captions}{signature}
\KOMAoption{titlepage}{false}
\KOMAoption{abstract}{true}
% KOMA is complaining and apparently this fixes it =/
\usepackage{scrhack}
\usepackage{listings}
% Split document into multiple parts
\usepackage{subfiles}
% e-TeX tools
\usepackage{etoolbox}
% Colours - put this before typography so additional named colours can be defined.
\usepackage{xcolor}
\definecolor{rmitred}{HTML}{CF102F}
%% Typography Settings
\usepackage{microtype}
\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}
\usepackage{xunicode}
\usepackage{xltxtra}
\addtokomafont{chapter}{\fontsize{28}{28}\selectfont\mdseries}
\renewcommand\chapterformat{%
{\fontsize{96}{96}\selectfont\textcolor{rmitred}{\thechapter}}\ }
\newbox\chapternumberbox
\renewcommand\chapterlinesformat[3]{%
\ifstr{#2}{}{
\parbox[b]{\textwidth}{\raggedright#3}%
}{%
\savebox\chapternumberbox{#2}%
\usebox\chapternumberbox%
\parbox[b]{\dimexpr\textwidth-\wd\chapternumberbox\relax}{\raggedright#3}%
}\par\nobreak
}
\begin{document}
\tableofcontents
\chapter{Introduction}
\label{ch:introduction}
\section{A Section}
This is an introduction
\chapter{Improving Chapter Styling}
\section{Why}
Why do we want to do this thing? Because fancy.
\section{How}
How do we do this thing?
\chapter{The Second Chapter}
Some important things
\chapter{The Third Chapter}
Lorem ipsum etc
\chapter{Conclusion}
Lorem ipsum etc
\addchap{An unnumbered chapter}
\end{document}