![\item 后不需要的垂直空间](https://linux22.com/image/453248/%5Citem%20%E5%90%8E%E4%B8%8D%E9%9C%80%E8%A6%81%E7%9A%84%E5%9E%82%E7%9B%B4%E7%A9%BA%E9%97%B4.png)
如果我运行以下代码
\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{color}
\usepackage{amsmath}
\usepackage{amsthm}
\def\myproof#1{{\color{blue}\begin{proof}#1 \end{proof}}}
\begin{document}
\begin{enumerate}
\item 1
\myproof{sdf}
\item Thisis Thisis This is This is This is This is This is This is This is This.
\myproof{sdf}
\end{enumerate}
\end{document}
然后我会得到
第二个上方的垂直间距很差证明。
我可以通过在之后添加%
或来解决这个问题\leavevmode
This.
但是,有没有什么办法可以通过改变的定义来首先防止这种情况发生\myproof
?
答案1
你需要\par
在 前面\color{blue}
。
您的示例中的情况是,来自行尾的空格后跟 ,{\color{blue}\begin{proof}...}
而\par
发出的\begin{proof}
(实际上是\trivlist
,但这并不重要)无法将其删除。因此构建了仅包含一个空格的行。
从以下示例中可以看出,用 掩盖结束线可以%
消除虚假线。
\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{color}
\usepackage{amsmath}
\usepackage{amsthm}
\def\myproof#1{{\color{blue}\begin{proof}#1 \end{proof}}}
\begin{document}
\begin{enumerate}
\item 1
\myproof{sdf}
\item Thisis Thisis This is This is This is This is This is This is This is This.%
\myproof{sdf}
\item Thisis Thisis This is This is This is This is This is This is This is This.
\myproof{sdf}
\end{enumerate}
\end{document}
如果我们将其修改为
\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{color}
\usepackage{amsmath}
\usepackage{amsthm}
\newcommand\myproof[1]{\par{\color{blue}\begin{proof}#1 \end{proof}}}
\begin{document}
\begin{enumerate}
\item 1
\myproof{sdf}
\item Thisis Thisis This is This is This is This is This is This is This is This.%
\myproof{sdf}
\item Thisis Thisis This is This is This is This is This is This is This is This.
\myproof{sdf}
\end{enumerate}
\end{document}
您会发现%
不再需要了。
我喜欢的方式是
\newenvironment{blueproof}{\par\color{blue}\proof}{\endproof}
使用
\begin{enumerate}
\item 1
\begin{blueproof}
sdf
\end{blueproof}
\item Thisis Thisis This is This is This is This is This is This is This is This.
\begin{blueproof}
sdf
\end{blueproof}
\end{enumerate}
\end{document}