对于 enuimitem 包，某些项目具有独特的不同 \itemsep

Question

我有以下 MWE：

\documentclass{article}

\usepackage{enumitem, kantlipsum}

\begin{document}
    \begin{enumerate}
        \item[Item 1] \kant[1]
        \item[Item 2] \kant[2-3]
        \item[Item 3] \kant[4]
    \end{enumerate}
\end{document}

产生输出减去红色标记。

对于用红色标记的单个项目\itemsep，我希望列表使用与默认项目不同的（较小的）值。我知道如何定义自定义项目，但如何让它使用与环境\itemsep其他部分不同的值enumerate？

Answer 1

插入负片\vspace以删除项目分隔符（实际上包括\parskip）。

\documentclass{article}

\usepackage{enumitem}

\begin{document}

\begin{enumerate}[itemsep=\baselineskip]
  \item[Item 1] Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
    Maecenas semper mattis eros eget malesuada. Curabitur ut dolor metus. 
    Vivamus condimentum nisi eu tincidunt aliquet.

  \item[Item 2] Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
    Maecenas semper mattis eros eget malesuada. Curabitur ut dolor metus. 
    Vivamus condimentum nisi eu tincidunt aliquet.

    Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
    Maecenas semper mattis eros eget malesuada. Curabitur ut dolor metus. 
    Vivamus condimentum nisi eu tincidunt aliquet.

  \vspace{\dimexpr-\itemsep-\parskip}% Remove item separation

  \item[Item 3] Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
    Maecenas semper mattis eros eget malesuada. Curabitur ut dolor metus. 
    Vivamus condimentum nisi eu tincidunt aliquet.

  \item[Item 4] Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
    Maecenas semper mattis eros eget malesuada. Curabitur ut dolor metus. 
    Vivamus condimentum nisi eu tincidunt aliquet.
\end{enumerate}

\end{document}

您也可以使用

\vspace{\dimexpr-\itemsep-\parskip+3pt}

如果您希望间隙为3pt。会删除列表在新的（不是第一个）-\itemsep-\parskip顶部插入的任何空间，因此添加长度应该准确地显示为s 之间的间隙。\item\item\item

Answer 2

您可以使用two（或更多）枚举环境和resume选项来实现这一点：

\documentclass{article}

\usepackage{enumitem, kantlipsum}

\begin{document}

    \begin{enumerate}[noitemsep]
        \item[Item 1] \kant[1]
        \item[Item 2] \kant[2-3]
    \end{enumerate}
        \begin{enumerate}[resume, before=\leavevmode\vspace*{-\dimexpr\baselineskip+\topsep+\partopsep\relax}]
        \item[Item 3] \kant[4]
        \item[Item 4] \kant[5]
    \end{enumerate}

\end{document} 

Answer 3

编辑： 一个简单的解决方案是在项目段落末尾使用\\[-\myitemsep]，以便减少垂直空间：

\documentclass{article}
\usepackage{enumitem, kantlipsum}
\usepackage{calc}% <-- added
\newlength\myitemsep% <-- added
\setlength\myitemsep{\baselineskip+\itemsep}% <-- added

\begin{document}

    \begin{enumerate}
        \item[Item 1] \kant[1]
        \item[Item 2] first item paragraph first item paragraph first item paragraph first item paragraph first item paragraph first item paragraph first item paragraph item paragraph item paragraph item paragraph item paragraph

            second item paragraph second item paragraph second item paragraph second item paragraph second item paragraph second item paragraph second item paragraph second item paragraph
            \\[-\myitemsep]% <-- added
        \item[Item 3] \kant[4]
        \item[Item 4] \kant[5]
    \end{enumerate}

\end{document}