如何删除 beamer 类中参考文献标题末尾的点？

Question

考虑以下 MWE：

\documentclass{beamer}

\usepackage[isbn=false,giveninits=true,uniquename=init,style=authoryear-comp,backend=biber,sorting=ynt,natbib,maxbibnames=99,maxcitenames=3,hyperref=true,sortcites=true,language=british,backref=true,url=false,doi=false]{biblatex}

\DeclareFieldFormat[misc]{title}{\mkbibemph{#1}\nopunct}

\usepackage{cleveref}

\addbibresource{References.bib}

\begin{document}

\citet{uncharter_45}

\printbibliography

\end{document}

其中书目条目为：

@misc{uncharter_45,
    title = {Charter of the United Nations},
    author = {{United Nations}},
    year = {1945},
    shorthand = {UN~Charter}
}

我想去掉标题末尾的点，因为我需要（引用第 1 页）以小写字母开头。我怎样才能去掉标题末尾的点？我已遵循此建议回答通过添加\DeclareFieldFormat[misc]{title}{\mkbibemph{#1}\nopunct}，但如 MWE 所示，它不起作用。

Answer 1

Beamer 修补了几个 biblatex 宏，例如，为参考书目中的各个元素获取正确的颜色。除其他外，它还使用了此补丁：

 \apptocmd{\abx@macro@title}
   {\ifcsundef{abx@field@title}{}{\ifpunct{}{\midsentence\newunitpunct}}%
    \newblock\unspace\usebeamercolor[fg]{bibliography entry note}}{}{}

这似乎导致了您观察到的文章和投影仪类别之间的不同行为。

您可以使用以下方法撤消补丁：

\documentclass{beamer}
%\documentclass{article}

\usepackage[isbn=false,giveninits=true,uniquename=init,style=authoryear-comp,backend=biber,sorting=ynt,natbib,maxbibnames=99,maxcitenames=3,hyperref=true,sortcites=true,language=british,backref=true,url=false,doi=false]{biblatex}

\DeclareFieldFormat[misc]{title}{\mkbibemph{#1}\nopunct}

\usepackage{cleveref}

\addbibresource{\jobname.bib}

\setbeamercolor{bibliography entry author}{fg=red}
\setbeamercolor{bibliography entry title}{fg=cyan}
\setbeamercolor{bibliography entry location}{fg=green}
\setbeamercolor{bibliography entry note}{fg=orange}

\makeatletter
\let\oldmacrotitle\abx@macro@title
\makeatother

\begin{document}

\makeatletter
\let\abx@macro@title\oldmacrotitle
\apptocmd{\blx@env@bibliography}
   {\let\makelabel\beamer@biblabeltemplate}{}{}
\apptocmd{\abx@macro@begentry}
   {\let\bbx@tempa\@empty%
    \usebeamercolor[fg]{bibliography entry author}}{}{}
\pretocmd{\abx@macro@labeltitle}
   {\ifboolexpr{ test {\ifcsundef{abx@field@label}}
      and test {\ifcsundef{abx@field@labeltitle}} }{}{\let\bbx@tempa\labelnamepunct}}{}{}
\pretocmd{\abx@macro@title}
   {\ifcsundef{abx@name@labelname}{}{\let\bbx@tempa\labelnamepunct}%
    \bbx@tempa\newblock\unspace\usebeamercolor[fg]{bibliography entry title}}{}{}
\apptocmd{\abx@macro@title}
 {\ifcsundef{abx@field@title}{}{}%
  \newblock\unspace\usebeamercolor[fg]{bibliography entry note}{}{}}    
\makeatother

\begin{frame}
\citet{uncharter_45}

\index{test}

\printbibliography
\end{frame}
\end{document}