在如何控制引用标题首字母的大小写，我最终不知怎么地要求一个宏来将首字母从 更改为lower case，upper case然后\NameRefChristian Hupfer 就用他的 做到了这一点。
但是，回到巨著，我很快就想起我还需要一个宏，可以将首字母从 更改upper case为lower case。那么，是否可以修改 Hupfer 宏\NameRef，使其根据首字母是lower case还是进行更改upper case？
他的代码是：
\documentclass[11pt]{book}
\usepackage{xparse}
\usepackage{tcolorbox}
\usepackage{hyperref}
\usepackage{cleveref}
\makeatletter
\def\first@up#1#2\relax{%
\uppercase{#1}#2%
}
\newcommand{\FirstUpcase}[1]{%
\expandafter\expandafter\expandafter\first@up#1\relax%
}
\makeatother
\NewDocumentCommand{\NameRef}{sm}{%
\IfBooleanTF{#1}{%
\FirstUpcase{\getrefbykeydefault{#2}{name}{-1}}%
}{%
\IfRefUndefinedExpandable{#2}{}{%
% label is defined, now get hyperlink
\hyperlink{\getrefbykeydefault{#2}{anchor}{-1}}{\FirstUpcase{\getrefbykeydefault{#2}{name}{-1}}}
}
}%
}
\newcounter{abc}%
\newtcolorbox%
[%beginForReferences
use counter= abc,
number within=chapter,
number freestyle={\noexpand\thechapter.\noexpand\arabic{\tcbcounter}~\noexpand\mytitleagree},%Used to make for LONG titles in the references.
crefname={alert}{alerts},
Crefname={Alert}{Alerts},
]%endForReferences
{greement}
[2][]%
{%
detach title,
coltitle=black,
nameref={#2},%
before upper={\tcbtitle\quad},
code={\gdef\mytitleagree{#2}},%Used to make for LONG titles in the references.
title=ALERT \thetcbcounter,%
#1,%Required for references.
}%
\begin{document}
\chapter{ONE}\label{1-0-0}
\section{One}\label{1-1-0}
\subsection{one}\label{1-1-1}
\emph{Relative to the title of the tcolorbox}
\begin{greement}[label={abc:3-1}]{infinity}
is not a number
\end{greement}
\emph{nameref gives}
We can see \nameref{abc:3-1}
\emph{Hupfer's NameRef gives}
\NameRef{abc:3-1} can be seen.
\emph{Similarly, relative to the title of the subsection, nameref gives}
Since \nameref{1-1-1} is a number, ...
\emph{and Hupfer's NameRef gives}
\NameRef{1-1-1} being a number
\textbf{all of which is what I asked for.}
\subsection{Two}\label{1-1-2}
But with
\begin{greement}[label={abc:3-2}]{Infinity}
is not everything
\end{greement}
\emph{I would like }
``We can see that infinity is not everything''
but \emph{nameref gives}
We can see that \nameref{abc:3-2} is not everything
and
\emph{NameRef also gives}
We can see that \NameRef{abc:3-2} is not everything.
\emph{Similarly, relative to the title of the subsection, nameref gives}
\nameref{1-1-2} is a number
but I would also like
Since two is a number
while, at this time, Hupfer's NameRef gives
Since \NameRef{1-1-2} is a number
\end{document}
代码结果如下：
