使用 tikz 进行下划线垂直对齐

Question

我想要将下划线与 tikz 数组内的其他文本对齐，但它显示在框的中间，如下图所示，并且可能与连字符混淆：

这是我的代码：

\begin{tikzpicture}[
    %  -{Stealth[length = 2.5pt]},
    start chain = going right,
    node distance = 0pt,
    Array/.style={draw, minimum width=2em, minimum height=2em, 
        outer sep=0pt, on chain},
    ]
    \node [Array] (1) {\texttt{A}};
    \node [Array] (2) {\texttt{\_}};
    \node [Array] (3) {\texttt{B}};

\end{tikzpicture}

Answer 1

作为评论中建议的替代\strut，您可以设置text height。

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{chains}
\begin{document}
\begin{tikzpicture}[
    %  -{Stealth[length = 2.5pt]},
    start chain = going right,
    node distance = 0pt,
    Array/.style={draw, minimum width=2em, text height=1.25ex, minimum height=2em, 
        outer sep=0pt, on chain},
    ]
    \node [Array] (1) {\texttt{A}};
    \node [Array] (2) {\texttt{\_}};
    \node [Array] (3) {\texttt{B}};
\end{tikzpicture}
\end{document}

Answer 2

很好的 @CarLaTeX 答案（+1）的（非常）小的变化 - 定义为所有节点的通用（略有不同）样式：

\documentclass[margin=3mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{chains}

\begin{document}
    \begin{tikzpicture}[
node distance = 0pt,
  start chain = going right,
        nodes = {draw, minimum width=2em, outer sep=0pt,
                     text height=1.75ex, text depth=0.25ex,
                     font=\ttfamily, on chain},
                        ]
\node   (1) {A};
\node   (2) {\_};
\node   (3) {B};
    \end{tikzpicture}
\end{document}