如何使用 floatrow 包实现多重图图像的顶部对齐？

Question

我正在尝试排列以下 MWE 的子图像 (a) 和 (b)，使它们在顶部对齐。我尝试了以下方法，如解决方案中所述如何实现子图中图像的顶部对齐？但该解决方案仅适用于一个subfloatrow。

如何通过多个来实现subfloatrow？

\documentclass{article}
\usepackage[showframe, margin=25mm]{geometry}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{floatrow}

\begin{document}

\thisfloatsetup{style=plain}
\begin{figure}
  \ffigbox[\textwidth]
  {
    \thisfloatsetup{heightadjust=all
                    }
    \begin{subfloatrow}[2]\useFCwidth
      \ffigbox[\FBwidth][\FBheight][t]
      {\caption{} \label{}}
      {\includegraphics[width=0.5\textwidth,height=4.5cm]{example-image-a}}
      \hspace{10pt}
      \ffigbox[\FBwidth][\FBheight][t]
      {\caption{} \label{}}
      {\includegraphics[width=0.4\textwidth,height=5.5cm]{example-image-b}}
      \vspace{20pt}
    \end{subfloatrow}

    \thisfloatsetup{capbesideposition={left,top},
                    capbesidesep=none,
                    }
    \begin{subfloatrow}[1]
      \fcapside[\FBwidth]
      {\caption{} \label{}}
      {\includegraphics[width=0.9\textwidth,height=4.5cm]{example-image-c}}
      \vspace{10pt}
    \end{subfloatrow}

    \thisfloatsetup{capbesideposition={left,top},
                    capbesidesep=none,
                    }
    \begin{subfloatrow}[1]
      \fcapside[\FBwidth]
      {\caption{} \label{}}
      {\includegraphics[width=0.9\textwidth,height=4.0cm]{example-image-a}}
    \end{subfloatrow}
  }
  {\caption{Caption of all figures} \label{fig:}
  }
\end{figure}

\end{document}

Answer 1

使图像具有相同的高度以使标题保持在一行上：

\documentclass{article}
\usepackage[showframe, margin=25mm]{geometry}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{floatrow}

\begin{document}

\thisfloatsetup{style=plain}
\begin{figure}
  \ffigbox[\textwidth]
  {
    \thisfloatsetup{heightadjust=all
                    }
    \begin{subfloatrow}[2]\useFCwidth
      \ffigbox[\FBwidth][\FBheight][t]
      {\caption{} \label{}}
      {\begin{minipage}[T][5.5cm][t]{.5\textwidth}
      \includegraphics[width=\textwidth,height=4.5cm]{example-image-a}
      \end{minipage}}
      \hspace{10pt}
      \ffigbox[\FBwidth][\FBheight][t]
      {\caption{} \label{}}
      {\begin{minipage}[T][5.5cm][t]{.4\textwidth}
          \includegraphics[width=\textwidth,height=5.5cm]{example-image-b}
            \end{minipage}}
      \vspace{20pt}
    \end{subfloatrow}

    \thisfloatsetup{capbesideposition={left,top},
                    capbesidesep=none,
                    }
    \begin{subfloatrow}[1]
      \fcapside[\FBwidth]
      {\caption{} \label{}}
      {\includegraphics[width=0.9\textwidth,height=4.5cm]{example-image-c}}
      \vspace{10pt}
    \end{subfloatrow}

    \thisfloatsetup{capbesideposition={left,top},
                    capbesidesep=none,
                    }
    \begin{subfloatrow}[1]
      \fcapside[\FBwidth]
      {\caption{} \label{}}
      {\includegraphics[width=0.9\textwidth,height=4.0cm]{example-image-a}}
    \end{subfloatrow}
  }
  {\caption{Caption of all figures} \label{fig:}
  }
\end{figure}

\end{document}

Answer 2

如果加载了子标题，为什么还要使用 floatrow？有了子标题，事情就简单多了：

\documentclass{article}
\usepackage[showframe, margin=25mm]{geometry}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{floatrow}
%\usepackage[export]{adjustbox}


\begin{document}

\thisfloatsetup{style=plain}
\begin{figure}
\begin{subfigure}[T]{.5\textwidth} 
\includegraphics[width=\textwidth,height=4.5cm]{example-image-a}
\caption{}
\end{subfigure}
\hfill
\begin{subfigure}[T]{.4\textwidth} 
\includegraphics[width=\textwidth,height=5.5cm]{example-image-b}
\caption{}
\end{subfigure}

\vspace{10pt}

\thisfloatsetup{capbesideposition={left,top},
                    capbesidesep=none,
                    }
    \begin{subfloatrow}[1]
      \fcapside[\FBwidth]
      {\caption{} \label{}}
      {\includegraphics[width=0.9\textwidth,height=4.5cm]{example-image-c}}
      \vspace{10pt}
    \end{subfloatrow}

    \thisfloatsetup{capbesideposition={left,top},
                    capbesidesep=none,
                    }
    \begin{subfloatrow}[1]
      \fcapside[\FBwidth]
      {\caption{} \label{}}
      {\includegraphics[width=0.9\textwidth,height=4.0cm]{example-image-a}}
    \end{subfloatrow}

\caption{Caption of all figures} 
\label{fig:}

\end{figure}

\end{document}

Answer 3

这可行（稍微简化了您的代码，添加了主标题垂直间距的调整），但您必须编译两次：

\documentclass{article}
\usepackage[showframe, margin=25mm]{geometry}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{floatrow}

\begin{document}

\begin{figure}
    \floatsetup{valign=t, heightadjust=all,}%captionskip =0ex
  \ffigbox[\textwidth]%
  {\begin{subfloatrow}[2]\useFCwidth
      \ffigbox[\FBwidth][\FBheight][t]
      {\caption{} \label{}}
      {\includegraphics[width=0.5\textwidth,height=4.5cm]{example-image-a}}
      \hspace{10pt}
      \ffigbox[\FBwidth][\FBheight][t]
      {\caption{} \label{}}
      {\includegraphics[width=0.4\textwidth,height=5.5cm]{example-image-b}}
    \vspace{20pt}
    \end{subfloatrow}
 \floatsetup{capbesideposition={left,top},
 capbesidesep=none,
 }
 \begin{subfloatrow}[1]
 \fcapside[\FBwidth]
 {\caption{} \label{}}
 {\includegraphics[width=0.9\textwidth,height=4.5cm]{example-image-c}}
 \vspace{20pt}
 \end{subfloatrow}

 \begin{subfloatrow}[1]
 \fcapside[\FBwidth]
 {\caption{} \label{}}
 {\includegraphics[width=0.9\textwidth,height=4.0cm]{example-image-a}}
 \end{subfloatrow}
 \vskip -6em
 }%
 {\caption{Caption of all figures} \label{fig:}}
\end{figure}

\end{document}