TikZ 中的嵌套步骤

Question

我在 Beamer 演示文稿中有一个图形。我想逐步更改 TikZ 框的内容，并且框本身也应该是一个步骤。这有点奏效，但我收到了一条错误消息。所以我想知道如何正确地做到这一点。日志：

！软件包 tikz 错误：放弃此路径。您忘记了分号吗？。

! 您不能在受限水平模式下使用“\lastskip”。

MWE（可能有点大，但你会看到我试图完成的事情）：

\documentclass[14pt,compress]{beamer}
\usepackage{pgf,pgfplots,pgfpages,tikz,tikzsymbols}

\usetikzlibrary{positioning,shapes,calc,decorations.pathreplacing}
\tikzstyle{matnode} = [inner sep=0pt,outer
sep=0pt,anchor=base,remember picture]

\begin{document}

\begin{frame}{Balance sheet of firm}

\begin{tikzpicture}[remember picture,overlay]

\tikzstyle{sboxdef} = [  font={\small}, right=1cm,text width=2.1cm, rounded corners, inner sep=1ex, draw=black];

% Draw lines and titles for balance sheet
\node (start) at ($ (current page.south)!.85!(current page.north) $) {};
\node (end) at ($ (current page.south)!.20!(current page.north) $) {};

\node[shift={(-3.5cm,-0.5cm)}](Hstart) at ($ (current page.south)!.80!(current page.north) $) {};
\node[shift={(3.5cm,-0.5cm)}](Hend) at ($ (current page.south)!.80!(current page.north) $) {};

\draw[-,thick] (start)  --  (end);
\draw[-,thick] (Hstart)  --  (Hend);

\node[shift={(1.5cm,0.5cm)}](Htext1) at (Hstart){\textbf{Assets}};
\node[shift={(-1.5cm,0.5cm)}](Htext2) at (Hend){\textbf{Financed}};

% Content of asset-side of balance sheet.
% I need the first onslide because in the original slide I had more stuff prior to this. 
% I need onslide inside in order to take up space so that boxes remain the same (I think)
\onslide<1->{
    \node[shift={(-4.1cm,1.3cm)}](SAssets) at (current page.center)[sboxdef, text height=0.7cm, fill=red!20]{
        \onslide<1>{\textbf{Short\\ Assets}}\only<2->{\textbf{2573}}
    };
    
    \node[shift={(-4.1cm,-0.9cm)}](LAssets) at (current page.center)[sboxdef, text height=1.5cm, fill=red!20]{
        \onslide<1>{\textbf{Long\\ Assets}}\only<2->{\textbf{3876}}
    };
}

\end{tikzpicture}

\end{frame}
\end{document}

Answer 1

问题出在\onslide命令上，我已修复该命令。我还利用这个机会清理了它，\tikzstyle用相应的\tikzset语法替换了它，并提醒您注意\usetikzlibrary{overlay-beamer-styles}为这些事情而制作的。

\documentclass[14pt,compress]{beamer}
\usepackage{tikz}
\usetikzlibrary{overlay-beamer-styles}

\usetikzlibrary{positioning,shapes,calc,decorations.pathreplacing}
\tikzset{matnode/.style={inner sep=0pt,outer
sep=0pt,anchor=base,remember picture}}

\begin{document}

\begin{frame}{Balance sheet of firm}

\begin{tikzpicture}[remember picture,overlay]

\tikzset{sboxdef/.style={font={\small}, right=1cm,text width=2.1cm, rounded
corners, inner sep=1ex, draw=black}}

% Draw lines and titles for balance sheet
\node (start) at ($ (current page.south)!.85!(current page.north) $) {};
\node (end) at ($ (current page.south)!.20!(current page.north) $) {};
% 
\node[shift={(-3.5cm,-0.5cm)}](Hstart) at ($ (current page.south)!.80!(current page.north) $) {};
\node[shift={(3.5cm,-0.5cm)}](Hend) at ($ (current page.south)!.80!(current page.north) $) {};
% 
\draw[-,thick] (start)  --  (end);
\draw[-,thick] (Hstart)  --  (Hend);
% 
\node[shift={(1.5cm,0.5cm)}](Htext1) at (Hstart){\textbf{Assets}};
\node[shift={(-1.5cm,0.5cm)}](Htext2) at (Hend){\textbf{Financed}};
% 
% % Content of asset-side of balance sheet.
% % I need the first onslide because in the original slide I had more stuff prior to this. 
% % I need onslide inside in order to take up space so that boxes remain the same (I think)
\node[shift={(-4.1cm,1.3cm)},visible
on=<1->,align=center](SAssets) at (current page.center)[sboxdef,
text height=0.7cm, fill=red!20]{%
        \only<1>{\textbf{Short}\\ \textbf{Assets}}\only<2->{\textbf{2573}}
    };

\node[shift={(-4.1cm,-0.9cm)},visible
on=<1->,align=center](LAssets) at (current page.center)[sboxdef,
text height=1.5cm, fill=red!20]{%
        \only<1>{\textbf{Long}\\ \textbf{Assets}}\only<2->{\textbf{3876}}
    };
\end{tikzpicture}
\end{frame}
\end{document}