使用带有 subfig 的“独立”类时遇到问题

Question

我想生成一个图形并将其作为 PDF 嵌入到另一个文档中。为此，我想使用standalone我以前用过的类。但现在我遇到了很大的麻烦。

以下 MWE 按预期工作。

\documentclass{article}

\usepackage{subfig}
\usepackage[demo]{graphicx}

\newcommand{\imsize}{0.33\linewidth}

\begin{document}
\begin{figure}[htb]
    \centering
    \subfloat[][Here is some text.]{\includegraphics[width=\imsize]{<figure1>}}
    \subfloat[][Here is some more text.]{\includegraphics[width=\imsize]{<figure1>}}
    \subfloat[][Here is even more text, which should then break on several lines.]{\includegraphics[width=\imsize]{<figure1>}}
\end{figure}
\end{document}

但是当我使用该类standalone来获取最小图形 PDF 时，编译失败，而且我似乎找不到罪魁祸首，例如，我在 Ubuntu 16.04 上! LaTeX Error: Something's wrong--perhaps a missing \item.使用版本 4.45 编译下面的代码时遇到的问题。latexmk

\documentclass{standalone}

\usepackage{subfig}
\usepackage[demo]{graphicx}

\newcommand{\imsize}{0.33\linewidth}

\begin{document}
\begin{figure}
    \centering
    \subfloat[][Here is some text.]{\includegraphics[width=\imsize]{<figure1>}}
    \subfloat[][Here is some more text.]{\includegraphics[width=\imsize]{<figure1>}}
    \subfloat[][Here is even more text, which should then break on several lines.]{\includegraphics[width=\imsize]{<figure1>}}
\end{figure}
\end{document}

Answer 1

添加preview 选项：

\documentclass[preview, border=5pt]{standalone}
\usepackage{geometry}
\usepackage{subfig}
\usepackage{graphicx}

\newcommand{\imsize}{0.32\linewidth}

\begin{document}

\begin{figure}
    \centering
    \subfloat[][Here is some text.]{\includegraphics[width=\imsize]{TheLarch}}\enspace
    \subfloat[][Here is some more text.]{\includegraphics[width=\imsize]{TheLarch}}\enspace
    \subfloat[][Here is even more text, which should then break on several lines.]{\includegraphics[width=\imsize]{TheLarch}}
\end{figure}

\end{document}