使用 tkz-euclide 在圆上的特定点绘制箭头

Question

在下面的文件中，我可以轻松地在点上放置一个小箭头i，如下图所示。

\documentclass{article}
\usepackage{tkz-euclide}
\begin{document}

\begin{center}
\begin{tikzpicture}
\tkzDefPoint(0,0){O};
\tkzDrawCircle[R](O, 1cm); %draw circle 1 centered at O with radius 1
\tkzDefPoint(90:1){i};
\end{tikzpicture}
\end{center}

\end{document}

Answer 1

有decoration 图书馆

\documentclass{article}
\usepackage{tkz-euclide}

\begin{document}

    \begin{center}
        \begin{tikzpicture}[decoration={markings,
            mark=at position .25 with {\arrow[scale=2]{>}};}]
        \tkzDefPoint(0,0){O};
        \tkzDrawCircle[R,postaction={decorate}](O, 1cm); %draw circle 1 centered at O with radius 1
        \tkzDefPoint(90:1){i};
        \end{tikzpicture}
    \end{center}

\end{document}