如何在 tikz 中绘制矩形边缘标签？

Question

我想画一些类似的东西。如何获取矩形边缘标签？

这是 MWE。

\documentclass{article}
\usepackage{tikz}
\usepackage[margin=15mm]{geometry}
\usepackage{calc}
\usetikzlibrary{matrix,arrows}
\usetikzlibrary{positioning,arrows}
\usetikzlibrary{shapes,arrows,fit,calc,positioning,automata}


\begin{document}

\begin{tikzpicture}[>=stealth',shorten >=1pt,auto,node distance=5 cm,thick]

    \node[initial,state]        (A) []                          {};
    \node[state]         (B) [right of=A]                       {};

  \path[->] (A)  edge []    node []         {} (B);

\end{tikzpicture}

\end{document}

如何获取标签？

Answer 1

一种方法是将其添加到\path：

\path[->] (A) edge [] node [draw=black, text width=3.0cm, midway, yshift=2ex]  {Label} (B);

代码：

\documentclass{article}
\usepackage{tikz}
\usepackage[margin=15mm]{geometry}
\usepackage{calc}
\usetikzlibrary{matrix,arrows}
\usetikzlibrary{positioning,arrows}
\usetikzlibrary{shapes,arrows,fit,calc,positioning,automata}


\begin{document}

\begin{tikzpicture}[>=stealth',shorten >=1pt,auto,node distance=5 cm,thick]

    \node[initial,state]        (A) []                          {};
    \node[state]         (B) [right of=A]                       {};

  \path[->] (A)  edge []    node [draw=black, text width=3.0cm, midway, yshift=2ex]         {Label} (B);

\end{tikzpicture}

\end{document}