我之前已经问过两个关于垂直间距的问题（第一个问题：关于重叠 parbox 的问题；第二个问题：关于重叠表格的问题)，我还有最后一个相关问题。事实证明，我在第二个问题中遇到的问题与第一个问题实际上相同，因此如果再次出现重复，并且我遗漏了某些内容（几乎可以肯定是这种情况），请提前致歉。
我试图让带有标题的浮动在前后留有垂直空间，以便所有行完美折叠。下面是我尝试修改\@caption和的尝试figure。最终，我只能让底线重叠，但仍然与上面的行存在差异。
\documentclass{article}
\usepackage{color}
\setlength{\abovecaptionskip}{0pt} % set these registers at 0pt to start
\setlength{\belowcaptionskip}{0pt}
\setlength{\intextsep}{0pt}
\begin{document}
\begingroup\centering
\textcolor{red}{Figure 1: Example}
\par\endgroup
\vskip -\baselineskip
\begin{figure}[ht] % the float should be the height of one line?
\caption{Example}
\strut Control Example (red is above, blue is below)
\end{figure}
\vskip -2\baselineskip
\begingroup\centering
\textcolor{blue}{Figure 1: Example}
\par\endgroup
\makeatletter
\long\def\@caption#1[#2]#3{% looking at the definition of caption
\par
\addcontentsline{\csname ext@#1\endcsname}{#1}%
{\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
\begingroup
\@parboxrestore
\if@minipage
\@setminipage
\fi
\normalsize
\@makecaption{\csname fnum@#1\endcsname}{\ignorespaces
\strut #3\strut % added struts
}\par
\endgroup}
\vskip\baselineskip
\begingroup\centering
\textcolor{red}{Figure 2: Example}
\par\endgroup
\vskip -\baselineskip
\begin{figure}[ht]
\caption{Example}
\strut Now the above and below align properly.
\end{figure}
\vskip -2\baselineskip
\begingroup\centering
\textcolor{blue}{Figure 2: Example}
\par\endgroup
\newdimen\keepdepthdim % redefine the figure environment, using the solution from the First Question
\renewenvironment{figure}{\@float{figure}}{%
\par\global\keepdepthdim=\prevdepth
\end@float
\par\prevdepth=\keepdepthdim
}
\makeatother
\vskip\baselineskip
\begingroup\centering
\textcolor{red}{Figure 3: Example}
\par\endgroup
\vskip -\baselineskip
\begin{figure}[ht]
\caption{Example}
\strut Now the bottom line aligns with the caption?
\end{figure}
\vskip -2\baselineskip
\begingroup\centering
\textcolor{blue}{Figure 3: Example}
\par\endgroup
\end{document}
答案1
您需要向 和 重叠部分添加支撑\caption，因为您要对齐顶部和底部而不是基线。请注意\ht\strutbox+\dp\strutbox=\baselineskip。
\documentclass{article}
\usepackage{color}
\setlength{\abovecaptionskip}{0pt} % set these registers at 0pt to start
\setlength{\belowcaptionskip}{0pt}
\setlength{\intextsep}{0pt}
\begin{document}
\begingroup\centering
\textcolor{red}{Figure 1: Example\strut}
\par\endgroup
\vskip -\baselineskip
\begin{figure}[ht] % the float should be the height of one line?
\caption{Example\strut}
%\parbox[t]{\textwidth}{\caption{Example\strut}}\llap{\rule{\textwidth}{0.4pt}}
\strut Control Example (red is above, blue is below)
\end{figure}
\vskip -2\baselineskip
\begingroup\centering
\textcolor{blue}{Figure 1: Example\strut}
\par\endgroup
\end{document}