在“overprint”环境之后，\pause 不起作用

Question

在以下示例中，我想在 pdf 中在上述位置暂停。任何解决方案都会有所帮助。谢谢

\documentclass[xcolor=dvipsnames]{beamer} 
\usepackage[latin1]{inputenc}
\usepackage{times}
\usepackage{tikz}
\usetikzlibrary{calc}

\usepackage{verbatim}
\usetikzlibrary{arrows,shapes}
\usetheme{AnnArbor}
\makeatother
\setbeamertemplate{footline}
{
\leavevmode%
\hbox{%
\begin{beamercolorbox}[wd=.3\paperwidth,ht=2.25ex,dp=1ex,center]
{author in head/foot}%
\usebeamerfont{author in head/foot}\insertshortauthor
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.6\paperwidth,ht=2.25ex,dp=1ex,center
{title    in head/foot}%
\usebeamerfont{title in head/foot}\insertshorttitle\hspace*{1em}
\end{beamercolorbox}}%
\insertframenumber{} / \inserttotalframenumber\hspace*{1ex}
\vskip0pt%
}
\makeatletter
\setbeamertemplate{navigation symbols}{}
%\usepackage[german]{babel}

% Search online for beamer themes to find your favorite or use 
the     Berkeley theme as in this file.
%\setbeamertemplate{theorems}[numbered]


\usepackage{color} % It may be necessary to set PCTeX or 
   whatever       program you are using to output a .pdf instead of a
    .dvi file in order to see color on your screen.
\usepackage{graphicx} % This package is needed if you wish to 
include  external image files.
\usepackage{comment}
\usepackage{hyperref}
    \usepackage{amsmath}
    \usepackage[mathscr]{euscript}
      \theoremstyle{definition} % See Lesson Three of the 
LaTeX Manual  for more on this kind of "proclamation."
\newtheorem*{dfn}{A Reasonable Definition} 

 \begin{document}

 \begin{frame}
  \frametitle{Intuition: Continued...}
  \begin{itemize}
   \item Use of \alert{sub-sampling} according to deterministic target poilcy from the given behavioural trajectory, then assume
    sub-sampled data is i.i.d
    \begin{overprint}
     \onslide<1>$\textcolor{red}{A}$
     \onslide<2>$\textcolor{red}{B}$ 
    \end{overprint}
       %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       % I want to pause here
       %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \item C
               \end{frame}

                \end{document}

另外，在“C”出现后，将“B”从幻灯片中完全删除

    \begin{itemize}
          \item<1-> Use of \alert{sub-sampling} according to 
          deterministic  target poilcy from the given 
          behavioural trajectory, then assume
        sub-sampled data is i.i.d
        \begin{overprint}
        \onslide<2>$\textcolor{red}{A}$
        \onslide<3>$\textcolor{red}{B}$ 
        \end{overprint}

      \item<4-> C

我不想这样。我希望首先出现“A”，然后替换为“B”，在下一张幻灯片中出现“C”，而“B”保持不变。

Answer 1

你一定需要吗overprint？否则，检查以下代码是否给出了所需的结果。

\documentclass{beamer} 

\begin{document}
    \begin{frame}
      \frametitle{Intuition: Continued...}
      \begin{itemize}
            \item 0
            \only<1>{\item A}
            \item<2-> B
            \item<3> C
        \end{itemize}
    \end{frame}
\end{document}

Answer 2

这是保持的一种方法overprint（使用其可选参数来防止以下材料被推下）：

\documentclass[xcolor=dvipsnames]{beamer} 

\begin{document}

\begin{frame}
\frametitle{Intuition: Continued...}

\begin{itemize}
\item Use of \alert{sub-sampling} according to deterministic target poilcy from the given behavioural trajectory, then assume sub-sampled data is i.i.d
\begin{overprint}[3cm]

\only<1>{$\textcolor{red}{A}$}
\only<2->{$\textcolor{red}{B}$} 
\end{overprint}
\item<+(2)-> C
\end{itemize}
\end{frame}

\end{document}