我怎样才能绘制带有圆形、矩形和箭头的图表？

Question

我想绘制下面的图表。我该如何绘制这个图表？

Answer 1

您可以根据自己的喜好调整以下内容，这足以帮助您入门。

\documentclass[tikz,border=3.14]{standalone}

\begin{document}
\begin{tikzpicture}
  \path
    node[circle,draw,text width=6em,align=center]    (main){main}
    (main.east)    ++(0.25,0) node[anchor=west]      (b)   {balance}
    (b.north west) ++(0, 0.1) node[anchor=south west](w)   {withdraw}
    (b.south west) ++(0,-0.1) node[anchor=north west](t)   {transfer}
    ;
  \draw[fill=darkgray]
    (w.north east)      ++(.5, .5) coordinate(rtl)
    (rtl|-t.south east) ++(.5,-.5) coordinate(rbr) rectangle (rtl)
    ;
  \path
    (rbr) -- node[below]{Wall} (rtl|-rbr)
    (rbr|-main) ++(2,0)
    node[circle,draw,text width=6em,align=center](data){bank Account data}
    (rtl)      ++(-1,0) node[anchor=south east,font=\bfseries]{Public}
    (rtl-|rbr) ++( 1,0) node[anchor=south west,font=\bfseries]{Private}
    ;
  \foreach\x in{b,w,t}
    \draw[->] (\x-|w.east) -- (\x-|data.west);
\end{tikzpicture}
\end{document}