tcolorbox: 下部与顶部的 valign

Question

我想要上部右侧的下部。

为什么我没有获得下部的顶部对齐？
valign lower=top, % <------ Problem here!
没有效果。

附言：仅出于兴趣：“下部标题”有什么特殊之处吗？

\documentclass[12pt]{article}
\usepackage[showframe=false,
margin=2cm,
]{geometry}

\usepackage[most]{tcolorbox}

\newtcolorbox{mybox}[1][]{
enhanced, % 
boxrule=0pt,   frame hidden, % no Frame
%colframe=white,
colback=yellow!25,
arc=2pt, % "rounded corners"
%  halign=flush center,
% Title  =====================
colbacktitle=yellow!25,
coltitle=black, % Fontcolor Title
fonttitle=\bfseries\Large,
% Alignment  =====================
valign lower=top,  % <------   Problem here! 
#1, % eventually further optional keys
}

\tcbset{
splitten/.style={
% "Lower Part" =================
lower separated=false,% 
sidebyside, % Lower part to the right
},
}

\newcommand\TikzI{
\vbox{\begin{tikzpicture}[]
\draw[] (0,0) rectangle (4,5) node[midway, rotate=45]{TikZ I};
\end{tikzpicture}  }
}

\begin{document}
\begin{mybox}[title=Title:, splitten]
\TikzI
\tcblower
\textbf{Lower Part Title:}

aaa

bbb
\end{mybox}
\end{document}

Answer 1

首先，用于在并排模式下sidebyside align=top设置垂直对齐。tcolorbox

其次，使用tikz选项baseline（参见pgfmanualv3.1.7a，第 12.2.1 节）设置 的基线tikzpicture。此处将基线设置为比 的上边缘低一行（不跳过行）tikzpicture。

\documentclass[12pt]{article}
\usepackage[showframe=false,
  margin=2cm,
]{geometry}


\usepackage[most]{tcolorbox}
\usetikzlibrary{calc}

\newtcolorbox{mybox}[1][]{
  enhanced, % 
  boxrule=0pt,   frame hidden, % no Frame
  %colframe=white,
  colback=yellow!25,
  arc=2pt, % "rounded corners"
  %  halign=flush center,
  % Title  =====================
  colbacktitle=yellow!25,
  coltitle=black, % Fontcolor Title
  fonttitle=\bfseries\Large,
  % Alignment  =====================
  sidebyside align=top,
  #1, % eventually further optional keys
}

\tcbset{
splitten/.style={
% "Lower Part" =================
lower separated=false,% 
sidebyside, % Lower part to the right
},
}

\makeatletter
\newcommand\TikzI{%
  \vbox{\begin{tikzpicture}[baseline={($ (current bounding box.north) + (0pt,-\f@size pt) $)}]
    \draw[] (0,0) rectangle (4,5) node[midway, rotate=45]{TikZ I};
  \end{tikzpicture}}%
}
\makeatother

\begin{document}
\begin{mybox}[title=Title:, splitten]
  \TikzI
  \tcblower
  \textbf{Lower Part Title:}
  
  aaa
  
  bbb
\end{mybox}
\end{document}