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Tikz 节点未显示已保存框

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Tikz 节点未显示已保存框

我有一系列复杂的内容，我想使用 TikZ 来呈现。代码非常规则，所以我想编写一个简单的命令来处理所有事情。在下面的代码中，\aelabelA和\aelabelC根本无法正常工作，我不明白为什么。但是，\aelabelB确实有效。有人能解释一下为什么场景 A 和 C 的框内容不可见吗？

\documentclass{standalone}
\usepackage{xparse}
\usepackage{tikz}

\ExplSyntaxOn
\newsavebox\aebox
\NewDocumentCommand\aelabelA{ mu{~located~at~(}u{);} }
  {
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}
    \node[draw] ~ at~  (#3)  ~ {\usebox{\aebox}};
  }

\NewDocumentCommand\aelabelB{ m }
  {
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}
    \usebox{\aebox}
  }

\ExplSyntaxOff

\def\aelabelC#1 located at (#2);{%%
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}%%
    \node[draw] at (#2) {\usebox{\aebox}};
  }

\begin{document}

\begin{tikzpicture}

  \coordinate (AA) at (0,0);
  \coordinate (BB) at (2,2);
  \coordinate (CC) at (4,4);

  \aelabelA {Keys} located at (AA);

  \node[draw] at (BB) {\aelabelB{Keys}};

  \aelabelC{Keys} located at (CC);

\end{tikzpicture}

\end{document}

在此处输入图片描述

答案1

钛钾众所周知，Z 会吞食tikzpicture环境中的普通物质除非这个东西在节点中。你可以中断tikzpicture以避免被忽略，并且你需要一点全球化才能使其工作。我以这种方式修复了你的第一个命令，但出于教学目的保留了最后一个命令。

\documentclass{standalone}
\usepackage{xparse}
\usepackage{tikz}

\ExplSyntaxOn
\newsavebox\aebox
\NewDocumentCommand\aelabelA{ mu{~located~at~(}u{);} }
  {\begin{pgfinterruptpicture}
    \begin{lrbox}{0\null\global\setbox\aebox} % from https://tex.stackexchange.com/questions/49129/lrbox-in-newenvironment/49136#49136
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}
    \end{pgfinterruptpicture}
    \node[draw] ~ at~  (#3)  ~ {\usebox{\aebox}};
  }

\NewDocumentCommand\aelabelB{ m }
  {
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}
    \usebox{\aebox}
  }

\ExplSyntaxOff

\def\aelabelC#1 located at (#2);{%%
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}%%
    \node[draw] at (#2) {\usebox{\aebox}};
  }

\begin{document}

\begin{tikzpicture}

  \coordinate (AA) at (0,0);
  \coordinate (BB) at (2,2);
  \coordinate (CC) at (4,4);

  \aelabelA {Keys} located at (AA);

  \node[draw] at (BB) {\aelabelB{Keys}};

  \aelabelC{Keys} located at (CC);

\end{tikzpicture}

\end{document}

在此处输入图片描述

编辑：@egreg（mille grazie！）提供了一个稍微更干净的替代方案，具有相同的输出。

\documentclass{standalone}
\usepackage{xparse}
\usepackage{tikz}

\ExplSyntaxOn
\newsavebox\aebox
\NewDocumentCommand\aelabelA{ mu{~located~at~(}u{);} }
  {\begin{pgfinterruptpicture}
    \begin{lrbox}{0}%
      \begin{minipage}{1in}%
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}%
      \end{minipage}%
    \end{lrbox}%
    \global\setbox\aebox=\box0
    \end{pgfinterruptpicture}
    \node[draw] ~ at~  (#3)  ~ {\usebox{\aebox}};
  }

\NewDocumentCommand\aelabelB{ m }
  {
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}
    \usebox{\aebox}
  }

\ExplSyntaxOff

\def\aelabelC#1 located at (#2);{%%
    \begin{lrbox}{\aebox}
      \begin{minipage}{1in}
        \Large\ttfamily\bfseries
        \centering\makebox[0pt]{#1}
      \end{minipage}
    \end{lrbox}%%
    \node[draw] at (#2) {\usebox{\aebox}};
  }

\begin{document}

\begin{tikzpicture}

  \coordinate (AA) at (0,0);
  \coordinate (BB) at (2,2);
  \coordinate (CC) at (4,4);

  \aelabelA {Keys} located at (AA);

  \node[draw] at (BB) {\aelabelB{Keys}};

  \aelabelC{Keys} located at (CC);

\end{tikzpicture}

\end{document}

在\savebox​tikzpicture已创建于这个问题。

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