我需要增加两个标签之间的垂直空间，特别是任何标签（节或小节）和下一部分之间的垂直空间。
我用于目录的代码如下：
\documentclass[11pt,fleqn,x11names,table]{book}
\usepackage{xcolor, tcolorbox, multicol}
\usepackage{tikz,tkz-tab}
\usepackage{kpfonts}
\usepackage{titletoc}
\titlecontents{part}
[8em]{\centering\Large\sc\bfseries\contentslabel{3em}}{}{}
{}{}
\titlecontents{chapter}[0pc]
{\addvspace{30pt}
\begin{tikzpicture}[remember picture, overlay]
\draw[fill=orange,draw=orange] (-4,-.1) rectangle (0.0,0.5);
\pgftext[left,x=-1.5 cm,y=0.2cm]{\color{white}\Huge\sc\bfseries \ \thecontentslabel};%
\end{tikzpicture}\color{orange}\large\sc\bfseries}
{}{}
{\;\titlerule\;\large\sc\bfseries Página \thecontentspage
\begin{tikzpicture}[remember picture, overlay]
\draw[fill=orange,draw=orange] (2pt,0) rectangle (6,0.1pt);
\end{tikzpicture}}
\titlecontents{section}[2.4pc]
{\addvspace{1pt}}
{\contentslabel[\color{blue}\thecontentslabel]{2.4pc}}
{}
{\hfill\small \color{blue}\thecontentspage}
[]
\titlecontents*{subsection}[4pc]
{\addvspace{-1pt}\small}
{}
{}
{\hfill\small \color{blue}\thecontentspage}
[\\][]
\makeatletter
\renewcommand{\tableofcontents}{
\chapter*{
\vspace*{-20\p@}%
\begin{tikzpicture}[remember picture, overlay]%
\pgftext[right,x=15cm,y=0.2cm]{\color{black}\Huge\sc\bfseries \contentsname};%
\draw[fill=orange,draw=orange] (13,-.75) rectangle (20,1);%
\clip (13,-.75) rectangle (20,1);
\pgftext[right,x=15cm,y=0.2cm]{\color{black}\Huge\sc\bfseries \contentsname};%
\end{tikzpicture}}
\@starttoc{toc}}
\makeatother
\begin{document}
\tableofcontents
\thispagestyle{empty}
\part{Part I}
\chapter{Chapter 1}
\section{section 1}
\subsection{subsection 1}
\subsection{subsection 2}
\part{Part 2}
\chapter{Chapter 2}
\section{section 1}
\subsection{subsection 1}
\subsection{subsection 2}
\part{Part 3}
\chapter{Chapter 3}
\section{section 1}
\subsection{subsection 1}
\subsection{subsection 2}
\end{document}
最后生成下表：
但是，我真正需要生成的是以下内容：
有什么办法可以让它工作吗？谢谢！
答案1
只需添加以下代码行：
\titlecontents{part} [8em]{\addvspace{some length}\centering\Large\sc\bfseries\contentslabel{3em}}{}{}{}