SPHINX-numref适用于HTML，但不适用于LaTex

Question

我正在从事Sphinx项目的软件文档编制，其中包含很多数字。我使用“ numref”来引用图片。在HTML中可以正常工作。在LaTex中，我得到图。网上numref上只有几个问题，答案对我没有帮助。谁能告诉我我做错了吗？

我通过sphinx-quickstart安装了Sphinx环境。我的conf.py中的相关行是：

    # Conf.py

    # Automatic numbering
    numfig = True

    # -- Options for LaTeX output ------------------------------------------------

    latex_elements = {
        # The paper size ('letterpaper' or 'a4paper').
        #
        'papersize': 'a4paper',

        # The font size ('10pt', '11pt' or '12pt').
        #
        'pointsize': '10pt',

        # Additional stuff for the LaTeX preamble.
        # 'preamble': '',

        # Latex figure (float) alignment
        # 'figure_align': 'htbp',
        'figure_align': 'H' # disable floating
    }

    # Grouping the document tree into LaTeX files. List of tuples
    # (source start file, target name, title,
    #  author, documentclass [howto, manual, or own class]).

    latex_documents = [
        (master_doc, 'PDF_Test.tex', 'PDF generation',
         'Niels de Nies', 'manual'),
    ]

我的来源（index.rst）看起来像：

    #########################
    Sphinx numref Test
    #########################

    My first chapter
    ----------------

    The purpose of this test is to get the numref of figures working in LaTex.

    Section 1
    ~~~~~~~~~
    .. figure:: ../images/hippo.png
        :name: hippo

    :numref:`hippo` Hippopotamus    

    The figure above (:numref:`hippo`) shows an illuminated hippopotamus.

    The 'numref' works fine in HTML, but results in Fig. ?? with LaTex

    Below the alternative way using a label. The results are exactly the same:
    Perfect for HTML, but undefined reference for latexpdf

    .. _fig_hippo:

    .. figure:: ../images/hippo.png
        :name: hippo

    :numref:`fig_hippo` Hippopotamus    

在命令行乳胶上显示：

    === TeX engine is 'pdfTeX'
    Latexmk: Index file 'PDF_Test.idx' was written
    Latexmk: Log file says output to 'PDF_Test.pdf'
    Latexmk: List of undefined refs and citations:
      Reference `index:hippo' on page 1 undefined on input line 111
      Reference `index:hippo' on page 1 undefined on input line 113
    Latexmk: Summary of warnings from last run of (pdf)latex:
      Latex failed to resolve 2 reference(s)
    Latexmk: All targets () are up-to-date

在生成的PDF_Test.tex中，以下几行引起了麻烦：

    \hyperref[\detokenize{index:hippo}]{Fig.\@ \ref{\detokenize{index:hippo}}} Hippopotamus

    The figure above (\hyperref[\detokenize{index:hippo}]{Fig.\@ \ref{\detokenize{index:hippo}}}) shows an illuminated hippopotamus.

有人可以给我一个解决方法的提示吗？

Answer 1

花了很多时间，但最终我找到了答案。源代码应如下所示：

    .. figure:: ../images/hippo.png
        :name: hippo

        Hippopotamus    

    The figure above (:numref:`hippo`) shows an illuminated hippopotamus.

以HTML和PDF格式显示，例如：