使用 tcolorbox 制作的练习答案

Question

我在book课堂上逐章制作带有解决方案的练习，使用最新版本的文档tcolorbox。我想在书的末尾分组生成答案。我可以\tcbstartrecording在文件的开头和\tcbstoprecording结尾使用。最后，命令\tcbinputrecords以相同的顺序给出答案。我想获得按章节分组的答案，每组都有一个标题，第一章的答案为“第 1 章练习的解决方案”，第二章的答案为“第 2 章练习的解决方案”，依此类推。

我把我得到的 pdf 文件的第 4 页作为参考。我希望标题“第 1 章练习的解决方案”位于标题为“第 1 页练习 1.1 的解决方案”的框之前，标题为“第 2 章练习的解决方案”位于标题为“第 3 页练习 2.1 的解决方案”的框之前。我该怎么做？

以下是.tex使用的文件：

\documentclass{book}

\usepackage[most]{tcolorbox}
\tcbuselibrary{skins,breakable}

\usepackage{polyglossia}
\setmainlanguage{english}

\tcbuselibrary{skins,xparse}

\NewTColorBox[auto counter,number within=chapter]{exercise}{m+O{}}{%
    enhanced,
    colframe=green!20!black,
    colback=yellow!10!white,
    coltitle=green!40!black,
    fonttitle=\bfseries,
    underlay={\begin{tcbclipinterior}
        \shade[inner color=green!80!yellow,outer color=yellow!10!white]
            (interior.north west) circle (2cm);
        \draw[help lines,step=5mm,yellow!80!black,shift={(interior.north west)}]
            (interior.south west) grid (interior.north east);
        \end{tcbclipinterior}},
    title={Exercise~ \thetcbcounter:},
    label={exercise:#1},
    attach title to upper=\quad,
    after upper={\par\hfill\textcolor{green!40!black}%
        {\itshape Solution on page~\pageref{solution:#1}}},
    lowerbox=ignored,
    savelowerto=solutions/exercise-\thetcbcounter.tex,
    record={\string\solution{#1}{solutions/exercise-\thetcbcounter.tex}},
    #2
}

\NewTotalTColorBox{\solution}{mm}{%
    enhanced,
    colframe=red!20!black,
    colback=yellow!10!white,
    coltitle=red!40!black,
    fonttitle=\bfseries,
    underlay={\begin{tcbclipinterior}
        \shade[inner color=red!50!yellow,outer color=yellow!10!white]
            (interior.north west) circle (2cm);
        \draw[help lines,step=5mm,yellow!80!black,shift={(interior.north west)}]
            (interior.south west) grid (interior.north east);
        \end{tcbclipinterior}},
    title={Solution of Exercise~\ref{exercise:#1} on page~\pageref{exercise:#1}:},
    phantomlabel={solution:#1},
    attach title to upper=\par,
}{\input{#2}}

\tcbset{no solution/.style={no recording,after upper=}}

\begin{document}
\chapter{The first chapter}

\tcbstartrecording
\begin{exercise}{Ex1}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=\sin((\sin x)^2)
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( \sin((\sin x)^2) \right)’
=\cos((\sin x)^2) 2\sin x \cos x.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex1} is in the page \pageref{solution:Ex1}
\vspace*{1cm}
%\tcbstoprecording
%\tcbinputrecords
\chapter{The second chapter}

%\tcbstartrecording
\begin{exercise}{Ex2}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=(x^2+1) \sqrt{x^4+1}
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( (x^2+1) \sqrt{x^4+1} \right)’
= 2x\sqrt{x^4+1} + \frac{2x^3(x^2+1)}{\sqrt{x^4+1}}.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex2} is in the page \pageref{solution:Ex2}
\vspace*{1cm}
\tcbstoprecording
\newpage
\section{Solutions of the exercices}
\tcbinputrecords
\end{document}

以及其与Xelatex汇编的第4页：

Answer 1

可以添加\chapter命令以将有关章节的一些信息写入录制文件。对于第一章，此操作将失败，因为当时录制尚未开始。

如果章节号被重置，它也会失败。

由于在章节号增加之前进行前置，我决定在组trick \c@chapter中使用增加 1 的数字TeX，因此计数器值实际上并没有改变，但\thechapter会使用一段时间的欺骗值并应用为 定义的正确格式。在我看来， \thechapter这比使用类似 etc 的东西更好。\arabic{chapter}

随意更改\solutionchapterformat宏以生成解决方案章节组的任何漂亮/花哨的标题（但保留\bgroup... \egroup）

\documentclass{book}

\usepackage[most]{tcolorbox}

\usepackage{xpatch}

% Formatting command as a 'headline' of the solutions of chapter X
\NewDocumentCommand{\solutionchapterformat}{m}{%
  \noindent \bgroup\bfseries Solutions of the exercises of the chapter #1\egroup%
}
\makeatletter


\xpretocmd{\chapter}{%
  \begingroup
  \ifnum\value{chapter}>0\relax
  \tcbrecord{\string\clearpage}% Write a clearpage after the first chapter for each new chapter
  \fi
  \c@chapter \numexpr\c@chapter+1% Increase the count register `\@chapter` by one to trick `\thechapter` using the 'correct' chapter number
  \tcbrecord{%
    \solutionchapterformat{\thechapter}}%
  \endgroup
}{}{}

\NewDocumentCommand{\extrasolutioncontent}{+m}{%
  \tcbrecord{Extra solution stuff\par}% Remove this later on!
  \tcbrecord{\detokenize{#1}}%
}

\newcommand{\fetchsolutions}{%
%For the first chapter
\begingroup
\c@chapter1%
\solutionchapterformat{\thechapter}%
\endgroup% Now get the rest of the stuff
\tcbinputrecords
}
\makeatother

%\tcbuselibrary{skins,breakable}

%\usepackage{polyglossia}
%\setmainlanguage{english}
%\usepackage{fontspec}
%\setmainfont{Times New Roman}
%\setsansfont{Arial}
%\setmonofont{Courier New}


\NewTColorBox[auto counter,number within=chapter]{exercise}{m+O{}}{%
    enhanced,
    colframe=green!20!black,
    colback=yellow!10!white,
    coltitle=green!40!black,
    fonttitle=\bfseries,
    underlay={\begin{tcbclipinterior}
        \shade[inner color=green!80!yellow,outer color=yellow!10!white]
            (interior.north west) circle (2cm);
        \draw[help lines,step=5mm,yellow!80!black,shift={(interior.north west)}]
            (interior.south west) grid (interior.north east);
        \end{tcbclipinterior}},
    title={Exercise~ \thetcbcounter:},
    label={exercise:#1},
    attach title to upper=\quad,
    after upper={\par\hfill\textcolor{green!40!black}%
        {\itshape Solution on page~\pageref{solution:#1}}},
    lowerbox=ignored,
    savelowerto=solutions/exercise-\thetcbcounter.tex,
    record={\string\solution{#1}{solutions/exercise-\thetcbcounter.tex}},
    #2
}

\NewTotalTColorBox{\solution}{mm}{%
    enhanced,
    colframe=red!20!black,
    colback=yellow!10!white,
    coltitle=red!40!black,
    fonttitle=\bfseries,
    underlay={\begin{tcbclipinterior}
        \shade[inner color=red!50!yellow,outer color=yellow!10!white]
            (interior.north west) circle (2cm);
        \draw[help lines,step=5mm,yellow!80!black,shift={(interior.north west)}]
            (interior.south west) grid (interior.north east);
        \end{tcbclipinterior}},
    title={Solution of Exercise~\ref{exercise:#1} on page~\pageref{exercise:#1}:},
    phantomlabel={solution:#1},
    attach title to upper=\par,
}{\input{#2}}

\tcbset{no solution/.style={no recording,after upper=}}

\begin{document}
\chapter{The first chapter}

\tcbstartrecording
\begin{exercise}{Ex1}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=\sin((\sin x)^2)
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( \sin((\sin x)^2) \right)’
=\cos((\sin x)^2) 2\sin x \cos x.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex1} is in the page \pageref{solution:Ex1}
\vspace*{1cm}
%\tcbstoprecording
%\tcbinputrecords
\chapter{The second chapter}

%\tcbstartrecording
\begin{exercise}{Ex2}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=(x^2+1) \sqrt{x^4+1}
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( (x^2+1) \sqrt{x^4+1} \right)’
= 2x\sqrt{x^4+1} + \frac{2x^3(x^2+1)}{\sqrt{x^4+1}}.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex2} is in the page \pageref{solution:Ex2}
\vspace*{1cm}

\chapter{The third chapter}

\begin{exercise}{Ex3}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=(x^2+1) \sqrt{x^4+1}
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( (x^2+1) \sqrt{x^4+1} \right)’
= 2x\sqrt{x^4+1} + \frac{2x^3(x^2+1)}{\sqrt{x^4+1}}.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex3} is in the page \pageref{solution:Ex3}
\vspace*{1cm}


\extrasolutioncontent{$\textcolor{blue}{E=mc^2}$}

\begin{exercise}{Ex31}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=(x^2+1) \sqrt{x^4+1}
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( (x^2+1) \sqrt{x^4+1} \right)’
= 2x\sqrt{x^4+1} + \frac{2x^3(x^2+1)}{\sqrt{x^4+1}}.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex31} is in the page \pageref{solution:Ex31}
\vspace*{1cm}


\chapter{The fourth chapter}

\begin{exercise}{Ex4}[coltitle=cyan!80!black]
Compute the derivative of the following function:
\begin{equation*}
f(x)=(x^2+1) \sqrt{x^4+1}
\end{equation*}
\tcblower
The derivative is:
\begin{align*}
f’(x) &= \left( (x^2+1) \sqrt{x^4+1} \right)’
= 2x\sqrt{x^4+1} + \frac{2x^3(x^2+1)}{\sqrt{x^4+1}}.
\end{align*}
\end{exercise}
\vspace*{1cm}
The solution of the exercise \ref{exercise:Ex4} is in the page \pageref{solution:Ex3}
\vspace*{1cm}




\tcbstoprecording
\newpage
\section{Solutions of the exercices}
\fetchsolutions
\end{document}