根据这个问题的第一个答案，tcbtheorem 的集合数，我尝试推导一些其他适合我需要的涉及 tcb 计数器的宏，并找到这个宏，例如：
\makeatletter
\newcommand{\addtotcbcounter}[2]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\addtocounter{tcb@cnt@#1}{#2}
}
}
\makeatother
这给出了我想要的。我试过这个宏，类似于命令\value{counter}：
\makeatletter
\newcommand{\valuetcbcounter}[1]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\value{tcb@cnt@#1}
}
}
\makeatother
但是命令\valuetcbcounter{Theorem}报错。我怎样才能找到这样的宏？
我给出使用的.tex 文件：
\documentclass{article}
\usepackage{tcolorbox}
\tcbuselibrary{theorems}
\newtcbtheorem[number within=section]{Theorem}{Theorem}{}{Th}
\makeatletter
\newcommand{\providetcbcountername}[1]{%
\@ifundefined{c@tcb@cnt@#1}{%
--undefined--%
}{%
tcb@cnt@#1%
}
}
\newcommand{\settcbcounter}[2]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\setcounter{tcb@cnt@#1}{#2}
}
}
\newcommand{\displaytcbcounter}[1]{% Wrapper for \the...
\@ifundefined{thetcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\csname thetcb@cnt@#1\endcsname%
}%
}
\makeatother
%%% END MANIPULATING COUNTER OF TCOLORBOX
\makeatletter
\newcommand{\addtotcbcounter}[2]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\addtocounter{tcb@cnt@#1}{#2}
}
}
\makeatother
\makeatletter
\newcommand{\valuetcbcounter}[1]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\value{tcb@cnt@#1}
}
}
\makeatother
\begin{document}
\setcounter{section}{6}
\section{My nice section}
\settcbcounter{Theorem}{8}
The counter for theorem is \providetcbcountername{Theorem} and it has the value of \displaytcbcounter{Theorem}
\begin{Theorem}{}{}
We have $2 + 2 = 4$.
\end{Theorem}
\addtotcbcounter{Theorem}{2}
After adding 2 to tcbcounter, the macro for displaying the value of \providetcbcountername{Theorem} gives \displaytcbcounter{Theorem}.
%\valuetcbcounter{Theorem}
\end{document}
答案1
在没有通常的宏的情况下显示计数器值\the...需要计数器名称在\the\c@foo哪里或，因此只需在宏之前添加即可。foo\number\value{foo}\number\value\valuetcbcounter
这种方式仍然可以以或的方式\valuetcbcounter使用。\numexpr\ifnum
\documentclass{article}
\usepackage{tcolorbox}
\tcbuselibrary{theorems}
\newtcbtheorem[number within=section]{Theorem}{Theorem}{}{Th}
\makeatletter
\newcommand{\providetcbcountername}[1]{%
\@ifundefined{c@tcb@cnt@#1}{%
--undefined--%
}{%
tcb@cnt@#1%
}
}
\newcommand{\settcbcounter}[2]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\setcounter{tcb@cnt@#1}{#2}%
}
}
\newcommand{\displaytcbcounter}[1]{% Wrapper for \the...
\@ifundefined{thetcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\csname thetcb@cnt@#1\endcsname%
}%
}
\makeatother
%%% END MANIPULATING COUNTER OF TCOLORBOX
\makeatletter
\newcommand{\addtotcbcounter}[2]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\addtocounter{tcb@cnt@#1}{#2}%
}
}
\makeatother
\makeatletter
\newcommand{\valuetcbcounter}[1]{%
\@ifundefined{c@tcb@cnt@#1}{%
\GenericError{Error}{counter name #1 is no tcb counter }{}{}%
}{%
\number\value{tcb@cnt@#1}%
}
}
\makeatother
\begin{document}
\setcounter{section}{6}
\section{My nice section}
\settcbcounter{Theorem}{8}
The counter for theorem is \providetcbcountername{Theorem} and it has the value of \displaytcbcounter{Theorem}
\begin{Theorem}{}{}
We have $2 + 2 = 4$.
\end{Theorem}
\addtotcbcounter{Theorem}{2}
After adding 2 to tcbcounter, the macro for displaying the value of \providetcbcountername{Theorem} gives \displaytcbcounter{Theorem}.
\valuetcbcounter{Theorem}
Adding a value only for printing, not the value itself
\the\numexpr\valuetcbcounter{Theorem}+2
\ifnum11=\valuetcbcounter{Theorem}%
Hooray!
\else
Nope!
\fi
\end{document}