Tikz 节点垂直对齐和标题已添加到练习中

Question

我的问题与 sgmoye 对来自 Indesign 的启发性练习表。我想通过让练习编号与“练习”一词垂直对齐来扩展这个答案。从下图中可以看出，红线上方有一个小的垂直空间，这意味着目前情况并非如此。基本上，我想保留白色框周围的灰色边框，但让“练习”与这个白色框中的数字对齐。

此外，我想为每个练习添加不同的标题，该标题也应与练习编号垂直对齐。它应该位于给定图像右侧的白色间隙中（tikz 矩形外）。有人可以告诉我如何做到这一点吗？我已经添加了我正在使用的代码。

% !TEX encoding = UTF-8 Unicode
% !TEX TS-program = XeLaTeX


\documentclass[11pt,a4paper,landscape]{article}

\usepackage{tikz}
\usepackage{multicol}
\usepackage{lipsum}
\usepackage{tikzpagenodes}
\usepackage{eso-pic}
\usepackage{enumitem}
\usepackage{amsmath}
\usepackage{microtype}
\usepackage[margin=1in]{geometry}

\usetikzlibrary{calc}
\usetikzlibrary{shapes.multipart}

\newcounter{exrc}

\newcommand{\exstep}{%
    \stepcounter{exrc}%
    \tikz[baseline]\node[anchor=base,%
        rectangle split,
        rectangle split parts=2,
        draw=gray,
        thick,
        rectangle split horizontal,
        outer sep = 0pt,
        rectangle split part fill={gray,white},
        inner sep=0pt] (exx) at (0,0)
        {\textcolor{white}{\bfseries\extype}\nodepart{two}\textcolor{black}{\bfseries\theexrc}};
}

\AddToShipoutPictureBG{%
    \begin{tikzpicture}[remember picture,overlay]
        \draw[thick,rounded corners]
            ($(current page text area.south west)+(-12pt,-12pt)$)
                rectangle 
                ($(current page text area.north east)+(12pt,12pt)$);
        \node[white,fill=gray,rounded corners]
                at ($(current page text area.north)+(0,12pt)$) 
                %% Change `Exercises' to suit
                {\bfseries\sffamily\hspace*{1em}Exercises\hspace*{1em}};
    \end{tikzpicture}
}

%% There are two environments, `exci` for exercises using `enumerate`,
%% and `exct` for text exercises that do not use `enumerate`.
%% Both have an optional argument to change the name of the
%% exercise on the fly. See the included examples.

\newenvironment{exci}[2][Exercise]{%
    \def\extype{#1}%
    \leavevmode\exstep\par
    \smallskip
    #2
    \begin{enumerate}[leftmargin=*,noitemsep,nosep]
}{%
    \end{enumerate}
    \bigskip
    \def\extype{Exercise}%
}

\newenvironment{exct}[1][Exercise]{%
    \def\extype{#1}%
    \leavevmode\exstep\par
    \smallskip
    }{%
        \bigskip
        \def\extype{Exercise}%
}

\setlength{\columnseprule}{0.4pt}
\parindent0pt


\begin{document}

\begin{multicols*}{2}

\begin{exci}{Calculate the following limits:}
\item $$\lim\displaylimits_{x \to2}\frac{4x^3-5x-22}{x^{2}-x-2}$$
\end{exci}


\end{multicols*}

\end{document}

Answer 1

您需要添加rectangle split part align=base到节点选项。但随后您可能想要增加inner sep。我inner sep=1pt在下面的代码中使用了。

\newcommand{\exstep}{%
    \stepcounter{exrc}%
    \tikz[baseline]\node[anchor=base,%
        rectangle split,
        rectangle split parts=2,
        rectangle split part align=base,
        draw=gray,
        thick,
        rectangle split horizontal,
        outer sep = 0pt,
        rectangle split part fill={gray,white},
        inner sep=1pt] (exx) at (0,0)
        {\textcolor{white}{\bfseries\extype}\nodepart{two}\textcolor{black}{\bfseries\theexrc}};
}