如何使用 tikz 建立帶有箭頭的資訊圖錶框

Question

我想畫一個包含箭頭的框，其定義Infographic Box with Arrow為這個連結。我想更新下圖以產生從上到下的圖。

\documentclass[tikz,border=10pt]{standalone}
\usetikzlibrary{shapes.geometric, arrows}

\begin{document}
\begin{tikzpicture}[font=\small, node distance=2cm]
\tikzstyle{block} = [rectangle, draw, text width=12cm, text centered, rounded corners, minimum height=4em]
\tikzstyle{line} = [draw, -latex']

\node [block] (step1) {Alpha process};
\node [block, below of=step1] (step2) {Beta analysis};
\node [block, below of=step2] (step3) {Gamma results};

\path [line] (step1) -- (step2);
\path [line] (step2) -- (step3);
\end{tikzpicture}
\end{document}

有沒有辦法更新我的盒子並使它們看起來如下圖所示。

Answer 1

shapes.arrowsTi自備的庫kZ 有一個arrow box形狀你可以嘗試：

\documentclass[tikz, border=10pt]{standalone}
\usetikzlibrary{shapes.arrows}

\begin{document}
\begin{tikzpicture}
\tikzset{
    font=\small, 
    node distance=2cm,
    block/.style={
        arrow box, 
        draw, 
        text width=12cm, 
        text centered, 
        minimum height=4em,
        arrow box arrows={south:0.5cm}
    },
    last block/.style={
        block,
        arrow box arrows={south:0cm}
    }
}

\node[block] (step1) {Alpha process};
\node[block, below of=step1] (step2) {Beta analysis};
\node[last block, below of=step2] (step3) {Gamma results};

\end{tikzpicture}
\end{document}

請注意，您應該使用\tikzset而不是\tikzstyle.

---

或者，您可以手動繪製節點的邊框，或為了避免程式碼中的重複，請建立一個\pic：

\documentclass[tikz, border=10pt]{standalone}
\usetikzlibrary{shapes.arrows}

\begin{document}
\begin{tikzpicture}
\tikzset{
    font=\small, 
    node distance=2cm,
    pics/box with arrow/.style={
        code={
            \node[pic actions, text centered] (-node) {#1};
            \draw[rounded corners] 
                ([xshift=-0.25em]-node.south) -| (-node.north west) -| 
                (-node.south east) -- ([xshift=0.25em]-node.south);
            \draw ([xshift=-0.25em]-node.south) |- ++(-0.25em,-0.5em) --
                ++(0.5em,-0.5em) -- ++(0.5em,0.5em) -| ++(-0.25em,0.5em);
        }
    },
    pics/box without arrow/.style={
        code={
            \node[pic actions, text centered] (-node) {#1};
            \draw[rounded corners] 
                (-node.south east) rectangle (-node.north west);
        }
    }
}

\pic[text width=12cm, minimum height=4em] 
    (step1) {box with arrow={Alpha process}};

\pic[below of=step1-node, text width=12cm, minimum height=4em] 
    (step2) {box with arrow={Beta analysis}};

\pic[below of=step2-node, text width=12cm, minimum height=4em] 
    (step3) {box without arrow={Gamma results}};

\end{tikzpicture}
\end{document}