引用 tcolorbox 环境

Question

我尝试引用此环境，但结果显示有两个问号。此环境是否缺少某些内容，以便我能够引用它？

\documentclass{memoir}
\usepackage[utf8]{inputenc}
\usepackage{xcolor}
\usepackage[most]{tcolorbox}
\newcounter{testexample}
\usepackage{xparse}

\def\exampletext{Eksempel} % If English

 \NewDocumentEnvironment{testexample}{ O{} }
{
\colorlet{colexam}{red!55!black} % Global example color
\newtcolorbox[use counter=testexample]{testexamplebox}{%
% Example Frame Start
empty,% Empty previously set parameters
title={\exampletext\ \thetcbcounter: #1},% use \thetcbcounter to access the 
testexample counter text
% Attaching a box requires an overlay
attach boxed title to top left,
% Ensures proper line breaking in longer titles
minipage boxed title,
% (boxed title style requires an overlay)
boxed title style={empty,size=minimal,toprule=0pt,top=4pt,left=3mm,overlay= 
{}},
coltitle=colexam,fonttitle=\bfseries, before=\par\medskip\noindent,parbox=false,boxsep=0pt,left=3mm,right=0mm,top=2pt,breakable,pad at break=0mm,
before upper=\csname @totalleftmargin\endcsname0pt, % Use instead of 
parbox=true. %This ensures parskip is inherited by box.
% Handles box when it exists on one page only
overlay unbroken={\draw[colexam,line width=.5pt] ([xshift=-0pt]title.north 
west) -- ([xshift=-0pt]frame.south west); },
% Handles multipage box: first page
overlay first={\draw[colexam,line width=.5pt] ([xshift=-0pt]title.north west) 
-- ([xshift=-0pt]frame.south west); },
% Handles multipage box: middle page
overlay middle={\draw[colexam,line width=.5pt] ([xshift=-0pt]frame.north west) 
-- ([xshift=-0pt]frame.south west); },
% Handles multipage box: last page
overlay last={\draw[colexam,line width=.5pt] ([xshift=-0pt]frame.north west) - 
- ([xshift=-0pt]frame.south west); },%
}
\begin{testexamplebox}}
{\end{testexamplebox}\endlist}

\begin{document}

\begin{testexample}[Test]
\label{ex:1}
Here is an example
\end{testexample}

Look at example \ref{ex:1}
\end{document}

Answer 1

这个盒子和环境的规格尚不清楚，但的定义examplebox应该在环境之外完成，以及使用标签键。

然而，环境的可选参数被滥用为环境的标题，因此说label=ex:1作为一种选择是不可能的，因为它会被解释为一个标题。

我添加了第二个可选参数\NewTColorBox，该IfValueTF选项会检查这一点。

有了更多信息，我会推荐使用独立的盒子环境，而不是这种包装。

离题：ex:1是一个糟糕的标签名称——名称中带有数字的标签容易出错。

\documentclass{memoir}
\usepackage[utf8]{inputenc}
\usepackage{xcolor}
\usepackage[most]{tcolorbox}
\newcounter{testexample}
\usepackage{xparse}

\def\exampletext{Eksempel} % If English
\NewTColorBox[use counter=testexample]{testexamplebox}{O{}o}{%
% Example Frame Start
empty,% Empty previously set parameters
title={\exampletext\ \thetcbcounter: #1},% use \thetcbcounter to access the 
% Attaching a box requires an overlay
attach boxed title to top left,
% Ensures proper line breaking in longer titles
minipage boxed title,
% (boxed title style requires an overlay)
boxed title style={empty,size=minimal,toprule=0pt,top=4pt,left=3mm,overlay= 
{}},
coltitle=colexam,fonttitle=\bfseries, before=\par\medskip\noindent,parbox=false,boxsep=0pt,left=3mm,right=0mm,top=2pt,breakable,pad at break=0mm,
before upper=\csname @totalleftmargin\endcsname0pt, % Use instead of 
parbox=true. %This ensures parskip is inherited by box.
% Handles box when it exists on one page only
overlay unbroken={\draw[colexam,line width=.5pt] ([xshift=-0pt]title.north 
west) -- ([xshift=-0pt]frame.south west); },
% Handles multipage box: first page
overlay first={\draw[colexam,line width=.5pt] ([xshift=-0pt]title.north west) 
-- ([xshift=-0pt]frame.south west); },
% Handles multipage box: middle page
overlay middle={\draw[colexam,line width=.5pt] ([xshift=-0pt]frame.north west) 
-- ([xshift=-0pt]frame.south west); },
% Handles multipage box: last page
overlay last={\draw[colexam,line width=.5pt] ([xshift=-0pt]frame.north west) - 
- ([xshift=-0pt]frame.south west); },%
IfValueTF={#2}{#2}{},
}

\NewDocumentEnvironment{testexample}{O{}O{}}
{%
  \colorlet{colexam}{red!55!black} % Global example color
  \begin{testexamplebox}[#1][#2]
}{\end{testexamplebox}\endlist}

\begin{document}

\begin{testexample}[Test][label=ex:1]
Here is an example
\end{testexample}

Look at example \ref{ex:1}
\end{document}