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如何从框架内的单个幻灯片中删除框架标题，包括垂直间距/占位符

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如何从框架内的单个幻灯片中删除框架标题，包括垂直间距/占位符

问题

有没有办法暂时完全删除框架标题单身的指定帧的幻灯片？ 完全删除，我的意思是标题的垂直空间也删除。

我尝试过的方法

我尝试使用该\begin{frame}{\only<...>{...}}技术，但它保留了垂直间距。

原因

当我在具有覆盖规范的环境中深入时，其中一张幻灯片播放到一半时itemize，我想显示一个大的全屏图形。在此全屏部分，我希望框架标题不存在（就像使用 指定一样\frame{}）。全屏图像之后，我希望标题和其余项目重新出现。

除了从单张幻灯片中删除框架标题外，我可以实现所有这些。

平均能量损失

\documentclass{beamer}

\mode<presentation>
\setbeamercovered{transparent}

\begin{document}



\begin{frame}[t]{Frame number 1}
    \begin{itemize}
        \item This is frame number 1. 
            Compare the vertical placement of this itemize environment 
            to that on the next frame.
    \end{itemize}
\end{frame}



\begin{frame}[t]{}
    \begin{itemize}
        \item This is frame number 2. Note that this second frame has no vertical space for the title.
    \end{itemize}
\end{frame}



\begin{frame}[t]{\only<1,3>{Frame number 3}}
    \begin{itemize}
        \item <1-> I want the title showing on this slide, as it does.
        \item <2-> I want the title completely gone here, 
            including the vertical space it occupies. 
            (In my actual presentation, there will be a full-screen 
            figure in this position, 
            and the itemize environment will disappear.
        \item <3-> I want the title to come back
    \end{itemize}
\end{frame}
\end{document}

答案1

嗯，我想我应该再试 10 分钟。

我通过在命令\frametitle内包围命令解决了这个问题\only。（在之前的尝试中，我反转了嵌套，但显然没有起作用。

实际操作如下：

\documentclass{beamer}

\mode<presentation>
\setbeamercovered{transparent}

\begin{document}



\begin{frame}[t]{Frame number 1}
    \begin{itemize}
        \item This is frame number 1. 
            Compare the vertical placement of this itemize environment 
            to that on the next frame.
    \end{itemize}
\end{frame}



\begin{frame}[t]{}
    \begin{itemize}
        \item This is frame number 2. Note that this second frame has no vertical space for the title.
    \end{itemize}
\end{frame}



\begin{frame}[t]{}
    \only<1,3>{\frametitle{Frame number 3}}
    \begin{itemize}
        \item <1-> I want the title showing on this slide, as it does.
        \item <2-> I want the title completely gone here, 
            including the vertical space it occupies. 
            (In my actual presentation, there will be a full-screen 
            figure in this position, 
            and the itemize environment will disappear.
        \item <3-> I want the title to come back
    \end{itemize}
\end{frame}
\end{document}

答案2

以下仅为第二张幻灯片插入全帧图像：

  \only<2>{% On the second slide...
    \AddToShipoutPictureFG*{% Add a picture to the ForeGround for this slide only
      \AtPageCenter{% At the center of the page/slide
        \makebox[0pt]{% Horizontally center image on slide
          \raisebox{-.5\height}{% Vertically center image on slide
            \includegraphics[height=\paperheight,width=\paperwidth]{example-image}%
          }%
        }%
      }%
    }%
  }

您可以将其放置在frame适用的代码的任何位置。

这是添加了上述代码的最小示例：

\documentclass{beamer}

\mode<presentation>
\setbeamercovered{transparent}

\usepackage{eso-pic}

\begin{document}

\begin{frame}[t]{Frame number 1}
  \begin{itemize}
    \item This is frame number 1. 
      Compare the vertical placement of this itemize environment 
      to that on the next frame.
  \end{itemize}
\end{frame}

\begin{frame}[t]{}
  \begin{itemize}
    \item This is frame number 2. Note that this second frame has no vertical space for the title.
  \end{itemize}
\end{frame}

\begin{frame}[t]{\only<1,3>{Frame number 3}}
  \begin{itemize}
    \item <1-> I want the title showing on this slide, as it does.
    \item <2-> I want the title completely gone here, 
      including the vertical space it occupies. 
      (In my actual presentation, there will be a full-screen 
      figure in this position, 
      and the itemize environment will disappear.
    \item <3-> I want the title to come back
  \end{itemize}

  \only<2>{% On the second slide...
    \AddToShipoutPictureFG*{% Add a picture to the ForeGround for this slide only
      \AtPageCenter{% At the center of the page/slide
        \makebox[0pt]{% Horizontally center image on slide
          \raisebox{-.5\height}{% Vertically center image on slide
            \includegraphics[height=\paperheight,width=\paperwidth]{example-image}%
          }%
        }%
      }%
    }%
  }
\end{frame}

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