当图像标题中有变音符号时，\caption 会出现一个令人困扰的问题。变音符号显示正常，但在这种情况下，标题本身会左对齐，而不是居中。知道为什么我的环境会导致标题出现这种情况吗？
这是我正在使用的相关文档类。
\ProvidesClass{phdthesis}
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{\centering \normalfont\sffamily
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\thispagestyle{empty}
{\centering \normalfont\sffamily
\ifnum \c@secnumdepth >\m@ne
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\node at (current page.north west)
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\node[anchor=north west] at (-4pt,4pt) {\includegraphics[width=\paperwidth]{\thechapterimage}};
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\end{tikzpicture}};
\end{tikzpicture}}\par\vspace*{230\p@}
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%% Section numbering format
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\renewcommand{\section}{\@startsection{section}{1}{\z@}
{-4ex \@plus -1ex \@minus -.4ex}
{1ex \@plus.2ex }
{\normalfont\large\sffamily\bfseries}}
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{0.5ex \@plus.2ex }
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%%
%% Special environments (definition, exercise, example, furtherinfo)
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\newtheorem{exerciseT}{Exercise}[chapter]
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innertopmargin=5pt,
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linewidth=4pt]{eBox}
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\newenvironment{exercise}{\begin{eBox}\begin{exerciseT}}{\hfill{\color{mainColor}\tiny\ensuremath{\blacksquare}}\end{exerciseT}\end{eBox}}
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\rightmargin=25pt}\item\ignorespaces % Indentation on the right
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\node[draw=mainColor!60,line width=1pt,circle,fill=mainColor!25,font=\sffamily\bfseries,inner sep=2pt,outer sep=0pt] at (-15pt,0pt){\textcolor{mainColor}{R}};\end{tikzpicture}} % Orange R in a circle
\advance\baselineskip -1pt}{\end{list}\vskip5pt} % Tighter line spacing and white space after remark
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\newcommand{\distas}[1]{\mathbin{\overset{#1}{\kern\z@\sim}}}%
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\newcommand{\distras}[1]{%
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%% Misc
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\usepackage{booktabs} % Required for nicer horizontal rules in tables
\usepackage{parskip} % Inclui \bigskip para cada linha vazia
%\usepackage{subfig} % Inclui \subfigure and \subcaptionbox environment
\usepackage{float}
\usepackage{subcaption}
\usepackage[export]{adjustbox}
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~\vfill
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\noindent Copyright \copyright\ {#1}, {#2}\\
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%%
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我正在使用 RStudio RMarkdown 输出我的文档。以下是违规案例：
---
output: pdf_document
documentclass: phdthesis
---
\newpage
## Professora Sonia Brüsch (PSDC)\index{PSDC}
\begin{figure}[ht!]
\centering
\subcaptionbox{Mapa da Votação}{
\includegraphics[width=.98\linewidth]{figures/Cabos/2016/MAPA_13.pdf}}
\makebox[0pt][r]{\raisebox{16mm}{\includegraphics[height=35mm]{figures/Cabos/2016/Legenda.pdf}}\hspace{12mm}}
\medskip
\subcaptionbox{Informações do Candidato}{
\includegraphics[width=75mm,height=30mm]{figures/Cabos/2016/13_INFO_CAND.jpg}
}\quad
\subcaptionbox{Medidas de Desempenho Eleitoral}{
\includegraphics[width=73mm,height=30mm]{figures/Cabos/2016/13_INFO_ELEIT.jpg}
}
\caption{Análise de Desempenho Eleitoral\\Professora Sonia Br$ü$sch (PSDC), Curitiba, 2016}
\end{figure}
这会产生以下不太好的合理标题：
答案1
多行标题一般都是两端对齐的，如果想让其居中，需要使用\captionsetup{justification=centering}。
注意：某些更改纯属无端。
\documentclass{book}
\usepackage[utf8]{inputenc}
%\RequirePackage{fix-cm}
\usepackage[OT1,T1]{fontenc}
\usepackage[scaled]{helvet}
\renewcommand*\familydefault{\sfdefault}
\usepackage{microtype}
%\RequirePackage[english]{babel}
\usepackage[brazilian]{babel}
\usepackage{caption}
\usepackage{subcaption}
\usepackage[demo]{graphicx}
\usepackage{showframe}
\begin{document}
\begin{figure}[ht!]
\centering
\subcaptionbox{Mapa da Votação}{
\includegraphics[width=.98\linewidth]{figures/Cabos/2016/MAPA_13.pdf}}
\llap{\raisebox{16mm}{\includegraphics[height=35mm]{figures/Cabos/2016/Legenda.pdf}}\hspace{12mm}}
\medskip
\subcaptionbox{Informações do Candidato}{
\includegraphics[width=75mm,height=30mm]{figures/Cabos/2016/13_INFO_CAND.jpg}
}\quad
\subcaptionbox{Medidas de Desempenho Eleitoral}{
\includegraphics[width=73mm,height=30mm]{figures/Cabos/2016/13_INFO_ELEIT.jpg}
}
\captionsetup{justification=centering}
\caption{Análise de Desempenho Eleitoral\\Professora Sonia Br\"usch (PSDC), Curitiba, 2016}
\end{figure}
\end{document}