LaTeX Flow 交错箭头和框位置

Question

我尝试过使用边缘和其他方法，我希望的是交错框并对齐箭头，如图所示。

Answer 1

为此，您不需要任何特殊的东西，只positioning需要一些节点锚点。

\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}[box/.style={draw,minimum
        height=3.5em,minimum width=#1},box/.default=7em,>=stealth,very thick]
 \node[box=5.5em] (A){};
 \node[box,right=2cm of A] (B2){};
 \node[box,above=1cm of B2,xshift=0.5cm] (B1){};
 \node[box,below=1cm of B2,xshift=-0.5cm] (B3){};
 \draw[->] (A) -- (B2);
 \draw[<-] (B2.north east) -- (B2.north east|-B1.south);
 \draw[->] (B2.south west) -- (B2.south west|-B3.north);
\end{tikzpicture}
\end{document}

你能也使用chains，但在这个例子中这仍然没有意义恕我直言。

\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{chains}
\begin{document}
\begin{tikzpicture}[box/.style={draw,minimum
        height=3.5em,minimum width=#1},box/.default=7em,>=stealth,very thick]
 \begin{scope}[start chain=B going below,node distance=1cm,
    nodes={box,xshift=-5mm,on chain}]
  \node{};
  \node{};
  \node{};
 \end{scope}
 \node[box=5.5em,left=2cm of B-2] (A){};
 \draw[->] (A) -- (B-2);
 \draw[<-] (B-2.north east) -- (B-2.north east|-B-1.south);
 \draw[->] (B-2.south west) -- (B-2.south west|-B-3.north);
\end{tikzpicture}
\end{document}