Como remover o cabeçalho do frontmatter

Question

Eu tenho um cabeçalho criado com fancyhdr. Ele se repete em todas as páginas, incluindo as seções Índice e Prefácio. Tentei usar \thispagestyle{empty}mas só funciona na primeira página enquanto preciso limpar nafrontmatter

\documentclass[11pt]{book}
\usepackage{lipsum}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[RE]{\nouppercase{\leftmark}}
\fancyhead[LO]{\nouppercase{\rightmark}}

\renewcommand\headrulewidth{1.5pt}
\makeatletter
\def\headrule{{\if@fancyplain\let\headrulewidth\plainheadrulewidth\fi
        \hrule\@height\headrulewidth\@width\headwidth
        \vskip 2pt% 2pt between lines
        \hrule\@height.5pt\@width\headwidth% lower line with .5pt line width
        \vskip-\headrulewidth
        \vskip-1.5pt}}
\makeatother
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\thispagestyle{empty}
\frontmatter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Table of contents

\tableofcontents
\chapter{Preface}
\lipsum
\lipsum
\mainmatter
\chapter{Ch1}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\lipsum
\section{test}
\chapter{ch2}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}

\end {document}

Answer 1

mude este

\thispagestyle{empty}

para

\pagestyle{empty}

e insira \pagestyle{fancy} aqui

\mainmatter
\chapter{Ch1}

Será parecido agora

\mainmatter
\pagestyle{fancy}
\chapter{Ch1}

Answer 2

É isso que voce quer? No início, há apenas o título do capítulo (Conteúdo/Prefácio), as primeiras páginas do capítulo e as páginas em branco possuem estilo vazio (para todo o documento). Eu adicionei a twosideopção e usei os pacotes emptypagee xpatchepara conseguir isso.

\documentclass[11pt, twoside]{book}
\usepackage{lipsum}
\usepackage{fancyhdr}
\usepackage{xpatch, emptypage}%
 \pagestyle{fancy}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[RE]{\nouppercase{\leftmark}}
\fancyhead[LO]{\nouppercase{\rightmark}}

\renewcommand\headrulewidth{1.5pt}
\makeatletter
\def\headrule{{\if@fancyplain\let\headrulewidth\plainheadrulewidth\fi
        \hrule\@height\headrulewidth\@width\headwidth
        \vskip 2pt% 2pt between lines
        \hrule\@height.5pt\@width\headwidth% lower line with .5pt line width
        \vskip-\headrulewidth
        \vskip-1.5pt}}
\makeatother

%%
\xpatchcmd{\chapter}{%
\thispagestyle{plain}}{%
\thispagestyle{empty}}{}{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}

\frontmatter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Table of contents
\tableofcontents
\chapter*{Preface}
\markboth{Preface}{Preface}
\addcontentsline{toc}{chapter}{Preface}
\lipsum
\lipsum[1-4]
\mainmatter
\pagestyle{fancy}
\chapter{Ch1}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\lipsum
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}

\chapter{ch2}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\lipsum
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}
\section{test}

\end {document}