如果参数导致错误，如何使用 renewcommand 自定义纯文本标题

Question

最小工作示例：

\documentclass[12pt, a4paper, oneside, parskip=half]{scrbook}
\usepackage{fancyhdr}
\usepackage[english]{babel}
\usepackage{blindtext}

\pagestyle{fancy}
\fancyhead{}
\fancyfoot{}
\renewcommand{\chaptermark}[1]{\markboth{\MakeUppercase{\thechapter.\ #1}}{}}
\lhead[\leftmark]{\MakeUppercase{\leftmark}}
\rhead[\pagemark]{\pagemark}

\fancypagestyle{plain}{%
    %\renewcommand{\chaptermark}[1]{\markboth{\MakeUppercase{#1}}{}} %error
    %\renewcommand{\chaptermark}[1]{\markboth{\MakeUppercase{##1}}{}} %nothing happend
    \fancyhead{}%
    \fancyfoot{}%
    \rhead[\pagemark]{\pagemark}%
}

\begin{document}
    \chapter{This is a minimal working example}
    \blindtext[8]
\end{document}

我想显示不带前导数字的章节标题。两个注释都\renewcommand不起作用。

Answer 1

以下是使用scrlayer-scrpage和定义新的另一个建议mark：

\documentclass[12pt, oneside, parskip=half]{scrbook}
\usepackage[english]{babel}
\usepackage{blindtext}

\usepackage[manualmark,markcase=upper,headsepline,plainheadsepline]{scrlayer-scrpage}
\clearpairofpagestyles
\setkomafont{pagehead}{\upshape}
\ohead*{\pagemark}

\newmarks\chaptermarkwithoutnum
\makeatletter
\renewcommand\chaptermark[1]{%
  % code by @Schweinebacke (see https://tex.stackexchange.com/a/452733/9057):
  \begingroup
    \let\label\relax \let\index\relax \let\glossary\relax
    \@temptokena{#1}%
    \unrestored@protected@xdef\@themark{\the\@temptokena}%
    \@temptokena\expandafter\expandafter{\expandafter\MakeMarkcase\expandafter{\@themark}}%
    \marks\chaptermarkwithoutnum{\the\@temptokena}%
  \endgroup
  %
  \markboth{\MakeMarkcase{\ifnumbered{chapter}{\chaptermarkformat}{}#1}}{}%
}
\makeatother
\ihead[\firstmarks\chaptermarkwithoutnum]{\leftmark}

\begin{document}
\chapter{This is a minimal working example}
\Blindtext[10]
\end{document}

---

更新

不加附加标记的建议：

\documentclass[12pt, oneside, parskip=half]{scrbook}
\usepackage[english]{babel}
\usepackage{blindtext}

\usepackage[markcase=upper,headsepline,plainheadsepline]{scrlayer-scrpage}
\automark[chapter]{chapter}
\clearpairofpagestyles
\setkomafont{pagehead}{\upshape}
\ohead*{\pagemark}

\renewcommand\chaptermark[1]{%
  \markboth{\MakeMarkcase{\ifnumbered{chapter}{\chaptermarkformat}{}#1}}{\MakeMarkcase{#1}}%
}
\ihead[\righttopmark]{\leftmark}

\begin{document}
\chapter{This is a minimal working example}
\Blindtext[10]
\end{document}

结果和上面一样。

Answer 2

fancyhdr通常不应与 KOMA 脚本类一起使用，因为您会收到以下警告.log：

Class scrbook Warning: Usage of package `fancyhdr' together
(scrbook)              with a KOMA-Script class is not recommended.
(scrbook)              I'd suggest to use 
(scrbook)              package `scrlayer-scrpage'.
(scrbook)              Nevertheless, using requested
(scrbook)              package `fancyhdr' on input line 3.

但是，您可以按照以下方法获得所需的输出。即plain页面样式（与章节的第一页相关联）显示章节标题没有一个数字，而其他页面则用数字显示：

\documentclass{scrbook}
\usepackage{fancyhdr}
\usepackage{blindtext}

\pagestyle{fancy}
\fancyhf{}% Clear header/footer
\renewcommand{\chaptermark}[1]{\markboth{\MakeUppercase{\thechapter.\ #1}}{}}
\lhead[\leftmark]{\MakeUppercase{\leftmark}}
\rhead[\pagemark]{\pagemark}

\makeatletter
\fancypagestyle{plain}{%
  \fancyhf{}% Clear header/footer
  \rhead[\pagemark]{\pagemark}%
  \lhead{\MakeUppercase{\scr@ds@head}}% Chapter title
}
\makeatother

\begin{document}
\chapter{This is a minimal working example}
\blindtext[8]
\end{document}

Answer 3

在页面样式中重新定义\chaptermark是完全没用的，因为命令是由 发出的\chapter。

我不知道目的是什么：我发现将章节标题放在起始章节页的顶部是错误的，因为相同的标题在下面几行。

但是，有一个技巧就是将章节号隐藏在一个宏中，该宏可以在本地重新定义，以便在排版纯文本标题时不返回任何内容。

该类scrbook会警告您有用于设置页眉和页脚的 Koma 脚本方法，但fancyhdr仍然允许您使用。不过，我将语法改成了更好的语法。

\documentclass[12pt, a4paper, oneside, parskip=half]{scrbook}
\usepackage[english]{babel}
\usepackage{fancyhdr}
\usepackage{etoolbox}

\usepackage{blindtext}

\newrobustcmd{\perhaps}[1]{#1}

\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{\perhaps{\thechapter.\ }#1}{}}
\fancyhead{}
\fancyfoot{}
\fancyhead[L]{\MakeUppercase{\leftmark}}
\fancyhead[R]{\thepage}

\makeatletter
\fancypagestyle{plain}{%
  \fancyhf{}%
  \fancyhead[L]{\let\perhaps\@gobble\MakeUppercase{\leftmark}}%
  \fancyhead[R]{\thepage}%
}
\makeatother

\begin{document}

\chapter{This is a minimal working example}

\blindtext[8]

\end{document}