调整 Longtable 以适应文本宽度

Question

我在将 longtables 调整为 textwidth 时遇到了问题。我使用的表格的列数不同，但 LaTeX 显然无法将它们调整为相同的宽度。所有列数相同的 Longtables 都以相同的宽度显示。我该如何解决这个问题？提前致谢！

\documentclass[a4paper,12pt,headsepline,american]{scrreprt}

\usepackage{array}
\usepackage[english]{babel}
\usepackage[labelfont=bf]{caption}
\captionsetup{format=plain,font=footnotesize}
\usepackage{float}
\usepackage{geometry}
\usepackage{layouts}
\usepackage{longtable}
\usepackage{ragged2e}

\begin{document}
...

\begin{longtable}{|>{\RaggedRight}p{0.4\textwidth}|>{\RaggedRight}p{0.2\textwidth}|>{\RaggedRight}p{0.4\textwidth}|}
\caption[...]{\textbf{...}}\\
\hline
... & ...   & ...\\
\hline
\hline
\endfirsthead
\hline
... & ...   & ...\\
\hline
\hline
\endhead
... & ...& ...\\
\hline
\end{longtable}

...

\begin{longtable}{|>{\RaggedRight}p{0.3\textwidth}|>{\RaggedRight}p{0.7\textwidth}|}
\caption[...]{\textbf{...}}\\
\hline
...     & ...\\
\hline
\hline
\endfirsthead
\hline
...     & ...\\
\hline
\hline
\endhead
...     & ...\\
\hline
\end{longtable}

...
\end{document}

Answer 1

您需要考虑规则的宽度（\arrayrulewidth）和列填充（\tabcolsep在列的每一侧），因此：

\documentclass[a4paper,12pt,headsepline,american]{scrreprt}

\usepackage{array}
\usepackage[english]{babel}
\usepackage[labelfont=bf]{caption}
\captionsetup{format=plain,font=footnotesize}
\usepackage{float}
\usepackage{geometry}
\usepackage{layouts}
\usepackage{longtable}
\usepackage{ragged2e}

\newlength\ltlen

\begin{document}
...

\setlength\ltlen{\dimexpr\textwidth-4\arrayrulewidth-6\tabcolsep}
\begin{longtable}{|>{\RaggedRight}p{0.4\ltlen}|>{\RaggedRight}p{0.2\ltlen}|>{\RaggedRight}p{0.4\ltlen}|}
\caption[...]{\textbf{...}}\\
\hline
... & ...   & ...\\
\hline
\hline
\endfirsthead
\hline
... & ...   & ...\\
\hline
\hline
\endhead
... & ...& ...\\
\hline
\end{longtable}

...

\setlength\ltlen{\dimexpr\textwidth-3\arrayrulewidth-4\tabcolsep}
\begin{longtable}{|>{\RaggedRight}p{0.3\ltlen}|>{\RaggedRight}p{0.7\ltlen}|}
\caption[...]{\textbf{...}}\\
\hline
...     & ...\\
\hline
\hline
\endfirsthead
\hline
...     & ...\\
\hline
\hline
\endhead
...     & ...\\
\hline
\end{longtable}

...
\end{document}