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交叉引用定理时，只显示章节和节的编号

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交叉引用定理时，只显示章节和节的编号

当我交叉引用一个定理时，为什么只出现章节和章节的编号？

\documentclass[x11names,oneside,12pt]{book}
\usepackage{tcolorbox}
\tcbuselibrary{theorems,breakable}
\newtcbtheorem[number within=section]{thm}{Theorem}{
       before skip=10pt, breakable, detach title, 
       leftrule=2mm, before upper={\tcbtitle\quad},
       coltitle=black, colback=black!3!white, 
       colframe=black!10!white, fonttitle=\bfseries, 
       arc=0mm, separator sign none, 
       description delimiters parenthesis, 
       terminator sign colon}{theo}
\begin{document}
\chapter{First Chapter}
\section{First Section}
\begin{thm}{}{}\label{thm}
Statement.
\end{thm}
In Theorem \ref{thm}\dots
\end{document}

答案1

当使用借助于彩色盒子包中，你必须更换

\begin{thm}{}{}\label{thm}

和

\begin{thm}[label=thm]{}{}

在用户指南的第 4.21 节“计数器、标签和引用”中对此进行了详细的解释（甚至可能过于详细……）。彩色盒子包裹。

在此处输入图片描述

\documentclass[x11names,oneside,12pt]{book}
\usepackage{tcolorbox}
\tcbuselibrary{theorems,breakable}
\newtcbtheorem[number within=section]{thm}{Theorem}{
       before skip=10pt, breakable, detach title, 
       leftrule=2mm, before upper={\tcbtitle\quad},
       coltitle=black, colback=black!3!white, 
       colframe=black!10!white, fonttitle=\bfseries, 
       arc=0mm, separator sign none, 
       description delimiters parenthesis, 
       terminator sign colon}{theo}

\begin{document}
\chapter{First Chapter}
\section{First Section}

%%\begin{thm}{}{}\label{thm} % <-- wrong
\begin{thm}[label=thm]{}{}   % <-- right
Statement.
\end{thm}

In Theorem \ref{thm}, \dots
\end{document}

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