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\documentclass[xcolor=svgnames, aspectratio=169]{beamer}
\usepackage{ctex}[space, noindent]
\usetheme{Warsaw}
\useoutertheme[width=.15\paperwidth]{sidebar}
\title{版面居中}
\usepackage{lmodern}
\institute{大学}
\author{****}
\date{2020年02月02日}
\begin{document}
\begin{frame}[plain] {}
内容版面居中
\titlepage
\end{frame}
%%%%%%%%%
\begin{frame}[plain] {}
\begin{center}
致谢页：内容版面居中
\end{center}
\end{frame}
\end{document}
1 回答
1
```tex
\documentclass[xcolor=svgnames, aspectratio=169]{ctexbeamer}
\usetheme{Warsaw}
\useoutertheme[width=.15\paperwidth]{sidebar}
\usepackage{lmodern}
\title{版面居中}
\date{2020年02月02日}
\usepackage{xifthen}
\usepackage{multido}
% copied from https://tex.stackexchange.com/a/423246
\newcommand{\foo}[1]{%
\multido{\i=1+1}{#1}{%
\i~Foo
}%
}
\makeatletter
\newenvironment{myplainframe}[1][]{%
\ifthenelse{\isnamedefined{beamer@sidebarwidth}}{%
% Customize frametitle (changes from \defbeamertemplate*{frametitle}{sidebar
% theme} in `beamerouterthemesidebar.sty' flagged with `% <- !')
\setbeamertemplate{frametitle}
{%
\nointerlineskip%
\ifbeamer@plainframe%
\hbox{\usebeamercolor[bg]{frametitle}%
\@tempdima\paperwidth%\advance\@tempdima-\beamer@sidebarwidth % <- !
\hskip-\beamer@leftmargin\vrule height\beamer@headheight width\@tempdima\hskip-\beamer@rightmargin}%
\nointerlineskip%
\fi%
\vskip-\beamer@headheight%
\vbox to \beamer@headheight{%
\vfil
\leftskip=-\beamer@leftmargin%
\advance\leftskip by0.3cm%
\rightskip=-\beamer@rightmargin%
\advance\rightskip by0.3cm plus1fil%
{\usebeamercolor[fg]{frametitle}\usebeamerfont{frametitle}\insertframetitle\par}%
{\usebeamercolor[fg]{framesubtitle}\usebeamerfont{framesubtitle}\insertframesubtitle\par}%
\vbox{}%
\vskip-1em%
\vfil
}%
}%
\setbeamertemplate{background canvas}
{%
\ifbeamercolorempty[bg]{background canvas}{}{\color{bg}\vrule width\dimexpr\paperwidth+\beamer@leftsidebar\relax height\paperheight}%
}
% Customize the geometry (changes from options of geometry package in
% `beamer.cls' flagged with `% <- !')
\hoffset=-\beamer@leftsidebar
\advance\textwidth\beamer@sidebarwidth
\hsize\textwidth
\columnwidth\textwidth
}{%
}%
%
\begin{frame}[plain,#1]%
}{%
\end{frame}%
}
\makeatother
\begin{document}
\begin{frame}[plain]{}
内容版面居中
\titlepage
\end{frame}
\begin{myplainframe}
\centering
致谢页：内容版面居中
\end{myplainframe}
\end{document}
```
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