如图所示,在上面有一个矩形框,下面两个矩形框,如何让上面矩形框居中,下面矩形框也居中?
采用一种比较讨巧的方式实现:在上面矩形框的下面定义一个无内容的空矩形框,然后下面两个矩形框在这个空矩形框的基础上左右排列
\begin{tikzpicture}[auto,
box/.style = {draw, minimum height=3cm, minimum width=3cm, align=left, outer sep=0pt},
lbl/.style = {anchor=north west, outer sep=0mm},
arrow1/.style = {
draw = black, thick, -{Latex[length = 2mm, width = 1.5mm]},
} ]
\node (n0) [draw,minimum height=1cm, minimum width=3cm, label={[lbl] north west:KG ~~ $\mathcal{G}$},] {};
\node (n00) [below =30mm of n0] {};
\node (n1) [box,
label={[lbl] north west:Prover ~~ $\mathcal{P}$},
left = 10mm of n00
] { };
\node (n3) [box,
label={[lbl]north west:Verifier~~ $\mathcal{V}$},
right=10mm of n00
]
{ };
\node (n4) [below=5mm of n3]{true or false};
\path[arrow1] ([yshift=2ex] n1.east) -- node{} ([yshift=2ex] n3.west);
\path[arrow1] ([yshift=-2ex] n3.west) -- node[above]{} ([yshift=-2ex] n1.east);
\path[arrow1] ([yshift=-6ex] n1.east) -- node{} ([yshift=-6ex] n3.west);
\path[arrow1] (n3) -- (n4);
\path[arrow1] (n0) --node{$ sk $} (n1.north);
\path[arrow1] (n0) --node{$ vk $} (n3.north);
\end{tikzpicture}
思考:如果是上面两个矩形框,下面一个矩形框,要求下面的矩形框也是居中对齐,应该如何设置呢?