错误地交叉引用带有定制标签的枚举列表中的项目

Question 1

我会定义一个特殊的环境。

\documentclass{article}
\usepackage[leqno]{amsmath}
\counterwithin{equation}{section}

\usepackage{enumitem}

\usepackage[colorlinks,allcolors=red]{hyperref}
\usepackage[nameinlink,noabbrev]{cleveref}

% define a proper environment
\newlist{eqlist}{enumerate}{1}
\crefname{eqlisti}{item}{items}
% the counter is shared
\ExpandArgs{cc}\RenewCommandCopy{c@eqlisti}{c@equation}
\setlist[eqlist,1]{
  left=0pt,                      % labels flush left
  label=\textup{(\theequation)}, % like for equations
  before=\stepcounter{equation}, % we want to go on with numbering
  resume,                        % don't forget the final number
}

\begin{document}
\setcounter{section}{2} % just for this example

A displayed and numbered equation:
\begin{equation}\label{eq:a}
1+1=2
\end{equation}
and a cross-reference to \cref{eq:a}.

An enumerated list that's ``numbered'' the same way as a displayed equation:  
\begin{eqlist}
\item  First enumerated fact.  \label{item:I}
\item  Second enumerated fact. 
\end{eqlist} 
I want to cross-reference \cref{item:I} the same way as \cref{eq:a}.

A displayed and numbered equation:
\begin{equation}\label{eq:b}
1+1=2
\end{equation}
and a cross-reference to \cref{eq:b}.

An enumerated list that's ``numbered'' the same way as a displayed equation:  
\begin{eqlist}
\item  First enumerated fact.  \label{item:I+}
\item  Second enumerated fact. 
\end{eqlist} 
I want to cross-reference \cref{item:I+} the same way as \cref{eq:b}.

\end{document}

Answer

我会定义一个特殊的环境。

\documentclass{article}
\usepackage[leqno]{amsmath}
\counterwithin{equation}{section}

\usepackage{enumitem}

\usepackage[colorlinks,allcolors=red]{hyperref}
\usepackage[nameinlink,noabbrev]{cleveref}

% define a proper environment
\newlist{eqlist}{enumerate}{1}
\crefname{eqlisti}{item}{items}
% the counter is shared
\ExpandArgs{cc}\RenewCommandCopy{c@eqlisti}{c@equation}
\setlist[eqlist,1]{
  left=0pt,                      % labels flush left
  label=\textup{(\theequation)}, % like for equations
  before=\stepcounter{equation}, % we want to go on with numbering
  resume,                        % don't forget the final number
}

\begin{document}
\setcounter{section}{2} % just for this example

A displayed and numbered equation:
\begin{equation}\label{eq:a}
1+1=2
\end{equation}
and a cross-reference to \cref{eq:a}.

An enumerated list that's ``numbered'' the same way as a displayed equation:  
\begin{eqlist}
\item  First enumerated fact.  \label{item:I}
\item  Second enumerated fact. 
\end{eqlist} 
I want to cross-reference \cref{item:I} the same way as \cref{eq:a}.

A displayed and numbered equation:
\begin{equation}\label{eq:b}
1+1=2
\end{equation}
and a cross-reference to \cref{eq:b}.

An enumerated list that's ``numbered'' the same way as a displayed equation:  
\begin{eqlist}
\item  First enumerated fact.  \label{item:I+}
\item  Second enumerated fact. 
\end{eqlist} 
I want to cross-reference \cref{item:I+} the same way as \cref{eq:b}.

\end{document}

Question 2

当您执行时format=\refstepcounter{equation}，\refstepcounter会在内调用，会被分组。当然，计数器本身是全局步进的，但是应该对下一个--和--\makelabel可用的变量会在组结束时丢失，因此不会看到设置的那些值。\label\@currentlabel\@currentcounter\label{item:I}\refstepcounter{equation}

现在，\refstepcounter{equation}在之后调用\item（不知何故）已经太迟了，因为项目的标签已经排版完毕，而在之前调用\item又太早，因为它会被的内部覆盖\refstepcounter。 \item唯一可以执行此操作的地方是在\refstepcounter调用的内部\item和之间\makelabel。我看不出enumitem的代码中有什么地方可以做到这一点，除非你破解它。

enumerate不过，作为计数器使用起来很简单，equation因为我们不想重置它，所以我们不能直接使用\usecounter，而只能设置\@listctr为equation。

\documentclass{article}
\usepackage[leqno]{amsmath}
\counterwithin{equation}{section}

\usepackage{parskip}
\usepackage{enumitem}

\usepackage[colorlinks,allcolors=red]{hyperref}
\usepackage[nameinlink,noabbrev]{cleveref}

\makeatletter
\newcommand{\mysetlistctr}[1]{\def\@listctr{#1}}
\makeatother

\begin{document}
\setcounter{section}{2} % just for this example

A displayed and numbered equation:
\begin{equation}\label{eq:a}
1+1=2
\end{equation}
and a cross-reference to \cref{eq:a}.

An enumerated list that's ``numbered'' the same way as a displayed equation:
\begin{enumerate}[first*=\mysetlistctr{equation}, label=(\theequation), left=0pt]
\item  First enumerated fact.  \label{item:I}
\item  Second enumerated fact.
\end{enumerate}
I want to cross-reference \cref{item:I} the same way as \cref{eq:a}.
\end{document}

无需篡改\crefalias或类似操作，因为cleveref只会“相信”这是一个正常的equation。

当然，这有点不正当，你需要在使用它时表现出一定的自我克制（例如，嵌套结果不会很漂亮，等等）。但是，除此之外，似乎可以以合理的方式完成工作。

Answer