如何理顺 TikZ 中自动机的转换关系？

Question

我有以下 MWE：

\documentclass[11pt]{article}

\usepackage{tikz}
\usetikzlibrary{arrows, automata}
\tikzset{
    initial text=\(\ast\),
}

\begin{document}

\begin{figure}[h]
    \centering
    \begin{tikzpicture}[>=stealth',thick, node distance=3cm]
        \node[state, initial] (q0) {$q_0$};
        \node[state, accepting, right of=q0] (q1) {$q_1$};

        \draw (q1) edge[loop above] node{$1$} (q1);
        \draw [->] (q0) edge[bend left, above] node{$0$} (q1);
        \draw [->] (q1) edge[bend left, below] node{$1$} (q0);
    \end{tikzpicture}
\end{figure}

\end{document}

我希望它看起来像这样：

有什麼方法可以得到它？

谢谢:D！

Answer 1

一种方法是从相关节点的north east/锚点中进行绘制。south east

如果你想让线条更紧密地靠在一起，你也可以使用角度锚点作为节点

\documentclass[11pt]{article}

\usepackage{tikz}
\usetikzlibrary{arrows, automata}
\tikzset{
    initial text=\(\ast\),
}

\begin{document}
    \begin{tikzpicture}[>=stealth',thick, node distance=3cm]
        \node[state, initial] (q0) {$q_0$};
        \node[state, accepting, right of=q0] (q1) {$q_1$};

        \draw (q1) edge[loop above] node{$1$} (q1);
        \draw  (q0.north east) edge[->, above] node{$0$} (q1.north west);
        \draw (q1.south west) edge[->, below] node{$1$} (q0.south east);
    \end{tikzpicture}

    \begin{tikzpicture}[>=stealth',thick, node distance=3cm]
        \node[state, initial] (q0) {$q_0$};
        \node[state, accepting, right of=q0] (q1) {$q_1$};

        \draw (q1) edge[loop above] node{$1$} (q1);
        \draw  (q0.20) edge[->, above] node{$0$} (q1.160);
        \draw (q1.200) edge[->, below] node{$1$} (q0.340);
    \end{tikzpicture}
\end{document}

Answer 2

...如果您想要不对称轮班，或者更一般地说，自定义轮班，请考虑

\documentclass[11pt]{article}

\usepackage{tikz}
\usetikzlibrary{arrows, automata,calc}
\tikzset{
    initial text=\(\ast\),
}

\begin{document}

\begin{figure}[h]
    \centering
    \begin{tikzpicture}[>=stealth',thick, node distance=3cm]
        \node[state, initial] (q0) {$q_0$};
        \node[state, accepting, right of=q0] (q1) {$q_1$};

        \draw (q1) edge[loop above] node{$1$} (q1);
        \draw [->] ($(q0.east)+(0,11pt)$) -- node[above]{$0$} ($(q1.west)+(0,11pt)$);
        \draw [->] ($(q1.west)+(0,-3pt)$) -- node[below]{$1$} ($(q0.east)+(0,-3pt)$);
    \end{tikzpicture}
\end{figure}

\end{document}