在定义 a newcounter（我将其命名为“cases”）crefname、、crefformat和 之后crefrangeformat，我用 增加计数器refstepcounter并用 标记它label。我可以用 引用单个案例，用和引用cref多个案例；但是，当用 引用多个案例时，类型不会像其他方法那样显示。我遗漏了什么？labelcrefcrefrangecref
以下是 MWE：
\documentclass{article}
\usepackage[capitalise]{cleveref}
\begin{document}
\section{My New Section}
\newcounter{cases}
\crefname{cases}{Case Study}{Case Studies}
\crefformat{cases}{Case Study~#2#1#3}
\crefrangeformat{cases}{Case Studies~#3#1#4 through~#5#2#6}
\Cref{case:a} comes first.
Next is \cref{case:b}.
Altogether, we have \cref{case:b,case:a}. %This shows ?? instead of "Case Studies" and "and". How do I fix this?
Trying again, we have Case Studies \labelcref{case:b,case:a}.
With a range, we have \crefrange{case:a}{case:b}.
\refstepcounter{cases} \label{case:a}
\textbf{Case Study \thecases:}
Blah.
\refstepcounter{cases} \label{case:b}
\textbf{Case Study \thecases:}
Blah.
\end{document}
补充说明：我对这些案例研究使用计数器而不是定理环境，因为与典型的定理相比，这些案例相对较长，而且我不想要定理环境附带的特殊格式。
答案1
\crefname并应进行类似的指示前 \begin{document}理应如此\newcounter。
\documentclass{article}
\usepackage[capitalise]{cleveref}
\newcounter{cases}
\crefname{cases}{Case Study}{Case Studies}
\crefformat{cases}{Case Study~#2#1#3}
\crefrangeformat{cases}{Case Studies~#3#1#4 through~#5#2#6}
\begin{document}
\section{My New Section}
\Cref{case:a} comes first.
Next is \cref{case:b}.
Altogether, we have \cref{case:b,case:a}.
Trying again, we have Case Studies \labelcref{case:b,case:a}.
With a range, we have \crefrange{case:a}{case:b}.
\refstepcounter{cases} \label{case:a}
\textbf{Case Study \thecases:}
Blah.
\refstepcounter{cases} \label{case:b}
\textbf{Case Study \thecases:}
Blah.
\end{document}
