忽略自定义环境可选参数

Question

我在自定义环境中使用环境。通常，在启动列表后，enumerate可以通过添加属性来恢复列表。但是，在我的自定义环境中，该属性被忽略。这导致每次都启动一个新列表的行为。我的目标自定义环境包含更多代码，但为了简单起见，我将其精简到重要部分。resumeresume

\documentclass{scrartcl}
\usepackage{enumitem}
\usepackage{xifthen}

\newenvironment{questionlist}
{
    \begin{enumerate}[{resume}]} % should lead to a resuming list
    {\end{enumerate}
}

\begin{document}

first part  

    \begin{questionlist}
        \item first
        \item second
    \end{questionlist}

second part % currently, produces a new list starting from 1 again and not from 3 

    \begin{questionlist}
        \item third
        \item fourth
    \end{questionlist}
\end{document}

Answer 1

我已经更改了你的代码

\newenvironment{questionlist}
{
    \begin{enumerate}[{resume}]} % should lead to a resuming list
    {\end{enumerate}
}  

到

\newenvironment{questionlist}
    {
        \enumerate[resume]
    }
    {
    \endenumerate
    }

并且它有效。

---

\documentclass{scrartcl}
\usepackage{enumitem}
\usepackage{xifthen}
\newenvironment{questionlist}
{
    \enumerate[resume]
}
{
\endenumerate
}
\begin{document}

first part  

    \begin{questionlist}
        \item first
        \item second
    \end{questionlist}

second part % currently, produces a new list starting from 3

    \begin{questionlist}
        \item third
        \item fourth
    \end{questionlist}
\end{document}

Answer 2

这是 Sebastianos 答案的替代方案，使用enumitem内置功能创建新列表，然后将其添加resume为该列表的属性

\documentclass{article}
\usepackage{enumitem}

\newlist{questionlist}{enumerate}{2}
\setlist[questionlist]{
  label=\arabic*.,
  resume
}
\begin{document}

first part  

\begin{questionlist}
\item first
\item second
\end{questionlist}

second part % currently, produces a new list starting from 1 again and not from 3 

\begin{questionlist}
\item third
\item fourth
\end{questionlist}

\end{document}