tabularx 中的 Onslide 产生垂直空间

Question

我有一个表格beamer我想要使​​用 来揭示其内容\onslide。在tabularx（或tabular带有p-column）这会在 -column 中产生奇怪的垂直空白X。您知道它从何而来和/或如何解决它吗？

以下是我使用的代码：

\begin{tabularx}{\textwidth}{|l|X|}
\hline
First line & A very long sentence that takes up more than one line because of its length\\
\onslide<2->{Second line} & \onslide<2->{A slightly longer sentence that takes up more than one line because of its length} \\
\hline
\end{tabularx}

或者使用p-column：

\begin{tabular}{|l|p{0.7\textwidth}|}
\hline
First line & A very long sentence that takes up more than one line because of its length\\
\onslide<2->{Second line} & \onslide<2->{A slightly longer sentence that takes up more than one line because of its length} \\
\hline
\end{tabular}

Answer 1

您需要避免将 beamer 特殊功能（或任何特殊功能）放在 parbox 的开始处：

\documentclass{beamer}
\begin{document}
\begin{frame}
\begin{tabular}{|l|p{0.7\textwidth}|}
\hline
First line & A very long sentence that takes up more than one line because of its length\\
\onslide<2->{Second line} & \leavevmode\onslide<2->{A slightly longer sentence that takes up more than one line because of its length} \\
\hline
\end{tabular}
\end{frame}
\end{document}