如何在 tikzpicture 中放置子标题？

Question

我在 tikzpicture 中放了几张图片。现在我想为每张图片添加一个子标题。这怎么可能？我也试过了，\captionof但也没用。

最小不工作示例：

\documentclass[12pt]{article}
\usepackage{caption,subcaption,tikz}
\usetikzlibrary{positioning}

\begin{document}
asdf
\begin{figure}[t]
\centering
\begin{tikzpicture}[font=\small]
\node (a){\includegraphics[width=5cm]{example-image-a}};
\node [below= of a]{\subcaption{hello}\label{subfig:hi}};
\end{tikzpicture}
\caption{caption}
\label{fig:captionlabel}
\end{figure}

\end{document}

Answer 1

您必须使用text width作为节点选项或使用\parbox（或minipage）以便位于\captionof组内。

\documentclass[12pt]{article}
\usepackage{caption,subcaption,tikz}
\usetikzlibrary{positioning}

\begin{document}
asdf
\begin{figure}[t]
\centering
\begin{tikzpicture}[font=\small]
\node[draw,inner sep=0pt] (a){\includegraphics[width=5cm]{example-image-a}};
\node [below= 1ex of a.south,inner sep=0pt]{\parbox{\linewidth}{\captionof{subfigure}{hello\label{subfig:hi}}}};
\end{tikzpicture}
\caption{caption}
\label{fig:captionlabel}
\end{figure}

\end{document}

Answer 2

你是指这样的吗？

\documentclass{article}

\usepackage{subcaption}
\usepackage{tikz}

\begin{document}

\begin{figure}
\centering
\begin{tikzpicture}
    \filldraw[red] (0,0) circle (3pt);
\end{tikzpicture}
\caption{Simple \texttt{tikz} picture}
\label{fig:TikzSimple}
\end{figure}

\begin{figure}
    \begin{subfigure}[b]{.5\linewidth}
        \centering\large A
        \caption{A subfigure}
        \label{subfig:SubfigureLeft}
    \end{subfigure}%
    \begin{subfigure}[b]{.5\linewidth}
        \centering\large B
        \caption{Another subfigure}
        \label{subfig:SubfigureRight}
    \end{subfigure}
    \caption{Example from the \texttt{subcaption} manual, page 5}
    \label{fig:SubfigureManuel}
\end{figure}

\begin{figure}
    \begin{subfigure}[b]{.5\linewidth}
        %
        \centering
        \begin{tikzpicture}
            \filldraw[red] (0,0) circle (3pt);
        \end{tikzpicture}
        %
        \caption{A subfigure}
        \label{subfig:CombinationLeft}
    \end{subfigure}%
    \begin{subfigure}[b]{.5\linewidth}
        %
        \centering
        \begin{tikzpicture}
            \filldraw[blue] (0,0) circle (3pt);
        \end{tikzpicture}
        %
        \caption{Another subfigure}
        \label{subfig:CombinationRight}
    \end{subfigure}
    \caption{Combination of \figurename~\ref{fig:TikzSimple} and \ref{fig:SubfigureManuel}.}
    \label{fig:Combination}
\end{figure}

\end{document}