我问了这个问题https://topanswers.xyz/tex?q=1244但这个问题似乎暴露了一个错误。
\documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\setbeamertemplate{frametitle}[default][center]
\usepackage[many]{tcolorbox}
\usepackage{listings}
\lstdefinestyle{duckstyle}{%
moredelim=[is][\color{red}]{|}{|},
mathescape=true,
escapechar=@,
basicstyle=\ttfamily,
columns=fullflexible
}
\lstset{style=duckstyle}
\newcommand{\ubar}[1]{\alt<+>{\underaccent{\bar}{#1}}{#1}}
\tcbuselibrary{skins}
\tcbset{
arc=0pt,
outer arc=0pt,
colback=white,
}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
shapes,
tikzmark}
\usetikzlibrary{tikzmark,shapes.geometric}
\usetikzmarklibrary{listings}
\usepackage{calc}
\newcommand{\Proc}[1]{\textsc{#1}}
\newcommand{\Var}[1]{\ensuremath{\textcolor{varcolor}{#1}}}
\definecolor{varcolor}{RGB}{15,122,183}
\definecolor{titlecolor}{RGB}{29, 110, 174}
\begin{document}
\begin{frame}[t, fragile]{}
Some text written here introducing the slide to the spectators.
\begin{columns}
\begin{column}{5.2cm} %
\begin{tcolorbox}[top=0pt, left=5pt,right=5pt, colback=blue!5!white, text width=5.2cm, text height=7cm]
\begin{lstlisting}[mathescape, name=misra, basewidth = {.3em}]
Algorithm($\Var{a_1,a_2,\dots,a_m}$)
set $\Var{A}$ = $\emptyset$
For each $\Var{i}$
\end{lstlisting}
\end{tcolorbox}
\end{column}
\begin{column}{\textwidth-5cm} %
\vspace{-0.8cm}
\begin{center}
\begin{tcolorbox}[top=0pt, left=5pt,right=5pt, colframe=blue, text width=4cm, text height=0.8cm]
\end{tcolorbox}
\end{center}
\begin{itemize}[<+->]
\setlength\itemsep{5pt plus 1fill}
\item[] $\tikzmark{step1}A \rightarrow \tilde{f}_A = 1 $
\item[] $C \rightarrow \tilde{f}_A = 1, \tilde{f}_C = 1$
\item[] $\tikzmark{step2}A \rightarrow \tilde{f}_A = 2, \tilde{f}_C = 1$
\end{itemize}
\end{column}
\begin{tikzpicture}[remember picture]
\only<1-2>{
\draw[->,overlay, dashed] (pic cs:step1) to [bend right]([xshift=0.2cm, yshift=.25\baselineskip]pic cs:line-misra-3-end);
}
\only<3>{
\draw[->,overlay, dashed] (pic cs:step2) to [bend right]([xshift=0.2cm, yshift=.25\baselineskip]pic cs:line-misra-4-end);
}
\end{tikzpicture}
\end{columns}
\end{frame}
\end{document}
箭头应该从右侧指向左侧的代码。但是在第一个箭头之后发生了一些事情，item导致它们改变方向，指向较远的右侧。
可以在以下位置找到使用 tcolorbox 版本列表的替代解决方案https://topanswers.xyz/tex?q=1244
答案1
问题是 listings 不会重置行号，这会混淆 tikzmarks（此处讨论了编号问题使用行号、“name”和“beamer”覆盖时出现列表问题）。
添加firstnumber=1选项作为解决方法：
\documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\setbeamertemplate{frametitle}[default][center]
\usepackage[many]{tcolorbox}
\usepackage{listings}
\lstdefinestyle{duckstyle}{%
moredelim=[is][\color{red}]{|}{|},
mathescape=true,
escapechar=@,
basicstyle=\ttfamily,
columns=fullflexible
}
\lstset{style=duckstyle}
\newcommand{\ubar}[1]{\alt<+>{\underaccent{\bar}{#1}}{#1}}
\tcbuselibrary{skins}
\tcbset{
arc=0pt,
outer arc=0pt,
colback=white,
}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
shapes,
tikzmark}
\usetikzlibrary{tikzmark,shapes.geometric}
\usetikzmarklibrary{listings}
\usepackage{calc}
\newcommand{\Proc}[1]{\textsc{#1}}
\newcommand{\Var}[1]{\ensuremath{\textcolor{varcolor}{#1}}}
\definecolor{varcolor}{RGB}{15,122,183}
\definecolor{titlecolor}{RGB}{29, 110, 174}
\begin{document}
\begin{frame}[t, fragile]{}
Some text written here introducing the slide to the spectators.
\begin{columns}
\begin{column}{5.2cm} %
\begin{tcolorbox}[top=0pt, left=5pt,right=5pt, colback=blue!5!white, text width=5.2cm, text height=7cm]
\begin{lstlisting}[firstnumber=1,mathescape, name=misra, basewidth = {.3em}]
Algorithm($\Var{a_1,a_2,\dots,a_m}$)
set $\Var{A}$ = $\emptyset$
For each $\Var{i}$
\end{lstlisting}
\end{tcolorbox}
\end{column}
\begin{column}{\textwidth-5cm} %
\vspace{-0.8cm}
\begin{center}
\begin{tcolorbox}[top=0pt, left=5pt,right=5pt, colframe=blue, text width=4cm, text height=0.8cm]
\end{tcolorbox}
\end{center}
\begin{itemize}[<+->]
\setlength\itemsep{5pt plus 1fill}
\item[] $\tikzmark{step1}A \rightarrow \tilde{f}_A = 1 $
\item[] $C \rightarrow \tilde{f}_A = 1, \tilde{f}_C = 1$
\item[] $\tikzmark{step2}A \rightarrow \tilde{f}_A = 2, \tilde{f}_C = 1$
\end{itemize}
\end{column}
\begin{tikzpicture}[remember picture]
\only<1-2>{
\draw[->,overlay, dashed] (pic cs:step1) to [bend right]([xshift=0.2cm, yshift=.25\baselineskip]pic cs:line-misra-3-end);
}
\only<3>{
\draw[->,overlay, dashed] (pic cs:step2) to [bend right]([xshift=0.2cm, yshift=.25\baselineskip]pic cs:line-misra-4-end);
}
\end{tikzpicture}
\end{columns}
\end{frame}
\end{document}