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后台包 - `\NoBgThispage` 命令有问题

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后台包 - `\NoBgThispage` 命令有问题

我无法使该命令具有确定性。我在使用 PDFLaTeX 时遇到的奇怪行为在以下 MWE 的评论中进行了解释。我在原始文档中检查了与包的冲突afterpage，也可能是通过包的冲突multicol，并在阅读了文档中的警告后background，但没有帮助。我该怎么办？

\documentclass[oneside,a4paper]{book}%
\usepackage[utf8]{inputenc}
\usepackage{lipsum}
\usepackage[pages=all]{background}
\backgroundsetup{opacity=0.7,contents={\Huge MY BACKGROUND}}


\begin{document}

\thispagestyle{plain}%  
%
\BgThispage{}\BgThispage{}\BgThispage{} %Shorthand to enhance opacity just here.

TITLE-PAGE


\clearpage\thispagestyle{empty}
\NoBgThispage{} 


\thispagestyle{empty}
A first BgLess page.


\clearpage\thispagestyle{empty}

%\NoBgThispage{} %THIS COMMAND WILL MAKE ALL THE FOLLOWING PAGES MISS THE BACKGROUND.

\textbf{No BG here, please, but yes afterwards. Shouldn't it be as easy as in the previous page?}


\clearpage\thispagestyle{empty}
%\BgThispage% Even this command will be bypassed.

\clearpage
%\NoBgThispage{} %Again, this will affect every remaining page.
TOC page.


\clearpage%

\lipsum[1-10]

\vfill{}Why is BG missing here?


\end{document}

答案1

在@Ulrike Fischer 的评论和这个答案之后：https://tex.stackexchange.com/a/210105/36389 一种可能的解决方法是考虑在之后更改背景设置，既可以增强特定页面的不透明度，也可以省略其他页面的背景\begin{document}。在本例中，我定义了 3 个命令来保存文档中不同的常见设置：

\documentclass[oneside,a4paper]{book}%
\usepackage[utf8]{inputenc}
\usepackage{lipsum}
\usepackage[pages=all]{background}
\newcommand{\TitlePageBgOpacity}{0.95}
\newcommand{\NormalPageBgOpacity}{0.5}
\newcommand{\NoBgPageBgOpacity}{0}

\backgroundsetup{contents={\Huge MY BACKGROUND}}

\begin{document}

\thispagestyle{plain}%  
%
\backgroundsetup{opacity=\TitlePageBgOpacity}

TITLE-PAGE


\clearpage\thispagestyle{empty}
\backgroundsetup{opacity=\NoBgPageBgOpacity}
\thispagestyle{empty}
A first BgLess page.


\clearpage\thispagestyle{empty}
%\backgroundsetup{opacity=\NoBgPageBgOpacity}

\textbf{No BG here, please, but yes afterwards. Shouldn't it be as easy as in the previous page?}


\clearpage\thispagestyle{empty}
\backgroundsetup{opacity=\NormalPageBgOpacity}

\clearpage
\backgroundsetup{opacity=\NoBgPageBgOpacity}
TOC page.


\clearpage%
\backgroundsetup{opacity=\NormalPageBgOpacity}
\lipsum[1-10]

\vfill{}Why is BG missing here?


\end{document}

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