指向嵌套节点的箭头

Question

我构建了一个带有嵌套节点的 TikZ 图像：

如您所见，我尝试从外部节点向内部节点添加箭头。如何才能将箭头指向内部节点的正确位置（西和南）？

梅威瑟：

\documentclass[border=1pt, tikz]{standalone}

\usetikzlibrary{positioning}

\begin{document}
\begin{tikzpicture}[draw=black, scale=1, transform shape
    , every node/.style = {rectangle, draw=black, align=center, inner xsep=6mm, inner ysep=3mm}
    ]
    % change default arrow style
    \tikzset{very thick, ->, -latex, shorten <=0pt, shorten >=0pt}

    % nodes
    \node (outer) {
        Caption\\[3mm]
        \begin{tikzpicture}[align=center]
            \node (inner) {Inner Text};
        \end{tikzpicture}
    };
    \node [above left=1mm and 10mm of inner.west] (leftabove) {left\\above};
    \node [below left=1mm and 10mm of inner.west] (leftbelow) {left\\below};

    % connections
    \draw (leftabove.east) to (outer.west);
    \draw (leftbelow.east) to (inner.west);
    \draw (leftbelow.east) to (inner.south);
\end{tikzpicture}
\end{document}

Answer 1

正如 Alenanno 所解释的那样，嵌套 不是一个好主意tikzpictures。如果要嵌套节点，有几种选择。其中一种如下面的代码所示。它使用fit库来定义一个包含inner节点及其 的节点label。（我已将其声明Caption为inner标签，尽管它可能是另一个未绘制的节点）。

\documentclass[border=1pt, tikz]{standalone}

\usetikzlibrary{positioning, fit}

\begin{document}
\begin{tikzpicture}
    [mynode/.style = {rectangle, draw, align=center, 
            inner xsep=6mm, inner ysep=3mm},
    -latex,     
    ]

    % nodes
    \node[mynode, label={[name=lab]Caption}] (inner) {Inner text};
    \node[fit={(inner) (lab)}, draw] (outer) {};
    \node[mynode, above left=1mm and 10mm of inner.west] (leftabove) {left\\above};
    \node[mynode, below left=1mm and 10mm of inner.west] (leftbelow) {left\\below};

    % connections
    \draw (leftabove.east) to (outer.west);
    \draw (leftbelow.east) to (inner.west);
    \draw (leftbelow.east) to (inner.south);
    \draw (leftabove.east) to (lab);
\end{tikzpicture}
\end{document}

Answer 2

像这样 ：

\documentclass[border=1pt, tikz]{standalone}

\usetikzlibrary{positioning}

\begin{document}
\begin{tikzpicture}[draw=black, scale=1, transform shape
    , every node/.style = {rectangle, draw=black, align=center, inner xsep=6mm, inner ysep=3mm}
    ]
    % change default arrow style
    \tikzset{very thick, ->, -latex, shorten <=0pt, shorten >=0pt}

    % nodes
    % \node (outer) {
    %     Caption\\[3mm]
    %     \begin{tikzpicture}[align=center]
    %         \node (inner) {Inner Text};
    %     \end{tikzpicture}
    % };
    \node[name=outer, minimum width = 4cm, minimum height= 2cm] {};
    \node[name=caption, below=(2mm of outer.north), draw=white, inner sep=0pt] {Caption};

    \node[name=inner, above=(2mm of outer.south)] {Inner Text};

    \node [above left=1mm and 10mm of inner.west] (leftabove) {\shortstack{left\\above}};
    \node [below left=1mm and 10mm of inner.west] (leftbelow) {\shortstack{left\\below}};

    % connections
    \draw (leftabove.east) to (outer.west);
    \draw (leftbelow.east) to (inner.west);
    \draw (leftbelow.east) to (inner.south);
\end{tikzpicture}
\end{document}