完整代码

Question

如何设置与每种样式类型相关的标签样式？

例如：（来源如下）

• 我有一个“输入”样式（中圆圈）和一个“连接”样式（小点），我希望默认情况下标签位于下方，但它们默认位于上方。
• 我还有一个“块”样式（渐变阴影矩形），其不知何故已经有标签默认为下方，我想为标签使用较小的字体。

我不知道如何做这两件事，我唯一能想到的就是如何使用来every label/.style改变所有标签的字体。

https://www.writelatex.com/read/jrwtbtqxntyz

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows,decorations.pathmorphing,backgrounds,positioning,fit}
\begin{document}
\begin{tikzpicture}[node distance=5mm,
    block/.style={
    % The shape:
    rectangle, minimum size=6mm,
    % The rest
    thick,draw=black,
    top color=white,
    bottom color=black!10
    },
    input/.style={
    % The shape:
    circle, minimum size=1mm,
    % The rest
    thick,draw=black,
    fill = white,
    },
    junction/.style={
    % The shape:
    circle, minimum size=0.5mm, inner sep=0pt,
    % The rest
    thick,draw=black,
    fill = black
    },
    every label/.style={
        font=\small
    },
    >=latex
    ]
\node (wcmd) [input, label=below:$\omega_{cmd}$]{};
\node (wcmd2) at (0,1) [input, label=$\omega_{cmd}$]{};
\node (jj) at (1,1) [junction, label=Z] {};
\node (C) [block, right=of wcmd] {C};
\node (D) [block,right=of C] {D};
\node (E) [block,right=of D, label=below:Hey] {E};
\node (F) [block,below=of D] {F};
\draw[->] (wcmd) -- (C);
\draw[->] (C) -- (D);
\end{tikzpicture}
\end{document}

Answer 1

如果希望不同样式下的标签具有不同的属性，一种方法是添加label这些样式的定义。例如，如果我希望样式中的标签block为红色，字体较小，默认位置在东北，我会将block样式定义为

block/.style={
  <list of other keys>,
  label={[red,font=\small]above left: #1},
}

并使用\node[block={<label text>}]{<node text>};，其中block采用一个参数（可以为空）来指定标签文本。

完整代码

\documentclass\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows,decorations.pathmorphing,backgrounds,positioning,fit}
\begin{document}
\begin{tikzpicture}[node distance=5mm,
    block/.style={
    % The shape:
    rectangle, minimum size=6mm,
    % The rest
    thick,draw=black,
    top color=white,
    bottom color=black!10,
    label={[red,font=\small]above right:#1},    % label for 'block'
    },
    input/.style={
    % The shape:
    circle, minimum size=1mm,
    % The rest
    thick,draw=black,
    fill = white,
    label={[orange,font=\tiny]below:#1}         % label for 'input'
    },
    junction/.style={
    % The shape:
    circle, minimum size=0.5mm, inner sep=0pt,
    % The rest
    thick,draw=black,
    fill = black,
    label={[blue,font=\footnotesize]below:#1}   % label for 'junction'
    },
    >=latex
    ]
\node (wcmd) [input=$\omega_{cmd}$]{};
\node (wcmd2) at (0,1) [input=$\omega_{cmd}$]{};
\node (jj) at (1,1) [junction=Z] {};
\node (C) [block, right=of wcmd] {C};
\node (D) [block,right=of C] {D};
\node (E) [block={Hey},right=of D] {E};
\node (F) [block,below=of D] {F};
\draw[->] (wcmd) -- (C);
\draw[->] (C) -- (D);
\end{tikzpicture}
\end{document}

输出