投影机框架中两根柱子的垂直对齐

Question

我尝试在一个框架中并排呈现两个概念。我希望每个项目都垂直对齐。下面是一个它们未对齐的示例。

\begin{frame}{An Example of using columns in beamer}

\begin{columns}

\begin{column}{0.48\textwidth}
\color{red}\rule{\linewidth}{4pt}
foo
\begin{itemize}
\item this is line 1 of foo
\item this is line 2 of foo which is long
\item this is line 3 of foo
\end{itemize}
\end{column}

\begin{column}{0.48\textwidth}
\color{blue}\rule{\linewidth}{4pt}
bar
\begin{itemize}
\item this is line 1 of bar
\item this is line 2 of bar
\item need this line to be aligned with line 3 of foo
\end{itemize}
\end{column}

\end{columns}

\end{frame}

Answer 1

一种方法是在两列中添加一些幻影文本，以便每个项目符号“占用”相同数量的行：

笔记：

• 还添加了[t]顶部对齐列

代码：

\documentclass{beamer}


\begin{document}
\begin{frame}{An Example of using columns in beamer}

\begin{columns}

\begin{column}[t]{0.48\textwidth}
\color{red}\rule{\linewidth}{4pt}
foo
\begin{itemize}
\item this is line 1 of foo
\item this is line 2 of foo which is long
\item this is line 3 of foo 
\end{itemize}
\end{column}

\begin{column}[t]{0.48\textwidth}
\color{blue}\rule{\linewidth}{4pt}
bar
\begin{itemize}
\item this is line 1 of bar
\item this is line 2 of bar \phantom{which is long}
\item need this line to be aligned with line 3 of foo
\end{itemize}
\end{column}

\end{columns}

\end{frame}
\end{document}

Answer 2

以下是通过两个新命令解决的解决方案：\parallelcontent和\parallelitem。

\documentclass{beamer}

\newcommand\parallelcontent[2]{
  \begin{columns}[t]
    \column{0.48\textwidth} #1
    \column{0.48\textwidth} #2
  \end{columns}
}
\newcommand\parallelitem[2]{
  \parallelcontent
  {\begin{itemize} \item #1 \end{itemize}}
  {\begin{itemize} \item #2 \end{itemize}}
}

\begin{document}
\begin{frame}{An Example of using columns in beamer}

  \parallelcontent
  {\textcolor{red}{\rule{\linewidth}{4pt} foo}}
  {\textcolor{blue}{\rule{\linewidth}{4pt} bar}}
  \parallelitem
  {this is line 1 of foo}
  {this is line 1 of bar}
  \parallelitem
  {this is line 2 of foo which is long}
  {this is line 2 of bar}
  \parallelitem
  {this is line 3 of foo}
  {need this line to be aligned with line 3 of foo}

\end{frame}
\end{document}