如何为特殊项目 enumi 和 enumii 在 \item 周围画一个圆圈！

Question

我可以在 enumi 的某些部分周围画圆圈，但是我不能在 enumii 的某些部分周围画圆圈。

\documentclass{article} 
\usepackage{refcount}
\usepackage{tikz}
\usetikzlibrary{shapes.misc}
\usetikzlibrary{calc}
\tikzset{
  every round node/.style={
    draw,
    shape=rounded rectangle,
    rounded rectangle arc length=180,
    inner sep=+.333em,
    text depth=+.1ex},
  light/.style={fill=none, text=black},
  dark/.style={fill=black, text=white}}
\newcommand{\round}[2][]{%
  \tikz[baseline]
    \node[
      every round node,
      anchor=base,
      #1]{$#2$};}
\begin{document}

\begin{enumerate}
\item\label{1} blabla

\pgfmathtruncatemacro{\Result}{\getrefnumber{1}+1}
\item[\round{\Result}] Step one 
\addtocounter{enumi}{1}

\item Step two 
\begin{enumerate}
\item\label{2} blabla
%\pgfmathtruncatemacro{\Result}{\getrefnumber{2}+1}!!!! IT IS NOT WORK HERE.
\item[\round{\Result}] Step one
\item blalblabla
\end{enumerate}
\item Step three
\end{enumerate}

\end{document}

Answer 1

这是一个非常简单的解决方案，只需更新\labelenumi或\labelenumii每次你想要一个圆圈，然后将其改回来（\circled从这里，做了一些小调整）。

---

\documentclass{article} 
\usepackage{refcount}
\usepackage{tikz}

\newcommand*\circled[1]{
    \tikz[baseline=(char.base)]{
        \node[shape=circle,draw,inner sep=0pt] (char) {#1\strut}
    }\kern-3pt
}

\let\oldlabelenumi=\labelenumi
\let\oldlabelenumii=\labelenumii

\begin{document}

\begin{enumerate}
\item\label{1} blabla

\item Step one 
\addtocounter{enumi}{1}

\renewcommand{\labelenumi}{\circled{\oldlabelenumi}}
\item Step two 
\renewcommand{\labelenumi}{\oldlabelenumi}

\begin{enumerate}
\item\label{2} blabla

\renewcommand{\labelenumii}{\circled{\oldlabelenumii}}
\item Step one
\renewcommand{\labelenumii}{\oldlabelenumii}

\item blalblabla
\end{enumerate}
\item Step three
\end{enumerate}

\end{document}

---

Answer 2

这是一个粗暴的方法，使用两个命令

\newcommand{\resulti}{\refstepcounter{enumi}\round{\theenumi}}
\newcommand{\resultii}{\refstepcounter{enumii}\round{\theenumii}}

然后使用

 \item[\resulti] Step one

对于外部枚举和

\item[\resultii] Step one

第一个内部的。

代码：

\documentclass{article}
\usepackage{refcount}
\usepackage{tikz}
\usetikzlibrary{shapes.misc}
\usetikzlibrary{calc}
\tikzset{
  every round node/.style={
    draw,
    shape=rounded rectangle,
    rounded rectangle arc length=180,
    inner sep=+.333em,
    text depth=+.1ex},
  light/.style={fill=none, text=black},
  dark/.style={fill=black, text=white}}
\newcommand{\round}[2][]{%
  \tikz[baseline]
    \node[
      every round node,
      anchor=base,
      #1]{#2};}
\newcommand{\resulti}{\refstepcounter{enumi}\round{\theenumi}}
\newcommand{\resultii}{\refstepcounter{enumii}\round{\theenumii}}
\begin{document}

\begin{enumerate}
\item\label{1} blabla

%\pgfmathtruncatemacro{\Result}{\getrefnumber{1}+1}
\item[\resulti] Step one
%\addtocounter{enumi}{1}

\item Step two
\begin{enumerate}
\item\label{2} blabla
%\pgfmathtruncatemacro{\Result}{\getrefnumber{2}+1}!!!! IT IS NOT WORK HERE.
\item[\resultii] Step one
\item blalblabla
\end{enumerate}
\item Step three
\end{enumerate}

\end{document}