我正在使用图片环境来\put从页面内部获取一些 tikzpictures \setkomavar{firsthead}。当我像这样声明一些 pgf 层时：
\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background, main, foreground}
图片消失了。图层的原因是为了创建一个漂亮的表格环境来显示一些数据。当我删除图层时，图片会重新出现。有谁知道让 tikzpictures 重新出现的任何明显方法吗？如果没有，我会举一个最简单的工作示例来解释我的意思。我试过了，\begin{pgfonlayer}{main}...\end{pgfonlayer}但什么也没改变。
编辑：最小工作示例
\documentclass{scrlttr2}
\usepackage{booktabs}
\usepackage{graphicx}
\usepackage{tikz}
\usepackage{tabularx}
\usepackage{color}
\usetikzlibrary{calc, fit, shadows, arrows, positioning}
% if these lines are commented out, the box draws.
\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background, main, foreground}
% end comment out these lines
\newsavebox{\monotablecontent}
\newenvironment{monotable}[1]{%
\begin{lrbox}{\monotablecontent}%
\begin{tabular}{#1}}%
%
{%
\end{tabular}
\end{lrbox}
\begin{tikzpicture}
\node [inner xsep=0pt] (tbl){\usebox{\monotablecontent}};
% table
\draw[rounded corners=1pt,top color=gray!1,bottom color=gray!30,draw=black]
(tbl.north east) rectangle (tbl.south west);
% top line
\draw[rounded corners=1pt,top color=gray!10!black,bottom color=gray!50!black,draw=black]
($(tbl.north west)$) rectangle ($(tbl.north east)-(0, 1.5\baselineskip)$);
% bottom rule
\draw[rounded corners=0.25pt,fill=gray,draw=black]
(tbl.south west) rectangle ($(tbl.south east)+(0, 0.05)$);
\end{tikzpicture}
}
\definecolor{myblue}{rgb}{0, 0.58, 0.85}
\newcommand*\invhead[1]{\sffamily{\color{myblue}\footnotesize{\textbf{#1}}}}
\newcommand*\head[1]{\tiny \invhead{#1}}
% set details
\setkomavar{fromname}{ACME Widgets}
\setkomavar{fromaddress}{1 Infinite Loop\\Sometown, 90210\\Uganda}
\setkomavar{fromphone}{+61 9876 5432}
\setkomavar{fromemail}{[email protected]}
\setkomavar{fromfax}{+61 9876 5431}
\setkomavar{fromurl}{http://acme.com/}
\setkomavar{signature}{ACME Widgets}
\setkomavar{fromlogo}{}
\setkomavar{invoice}[Invoice number]{1234 567}
\setkomavar{date}{}
\setkomavar{customer}[Account number]{123456}
% set up a style for our boxes that we will eventually draw.
\tikzstyle{shadedbox} = [
draw=black,
shade,
top color=white,
bottom color=bottom,
drop shadow={
top color=black,
bottom color=black,
shadow xshift=2pt,
shadow yshift=-2pt,
},
thin,
rectangle,
inner sep=2pt,
inner ysep=2pt,
outer ysep=1ex,
]
\newcommand*\monobox[2]{%
\begin{tikzpicture}
\definecolor{top}{RGB}{250,250,250}
\definecolor{bottom}{RGB}{235,235,235}
\begin{pfgonlayer}{main}
\node [shadedbox, minimum width=0.18\textwidth, text width=0.18\textwidth, align=right] (box) {
\begin{tabular}{r}
\invhead{\scriptsize #1}\\
\footnotesize{#2}\\
\end{tabular}
};
\end{pgfonlayer}
\end{tikzpicture}
}
% set the logo, draw some boxes...
\setkomavar{firsthead}{
\usekomavar{fromlogo}\\
\begin{picture}(0,0)
\put(0,0){
\parbox[t]{\textwidth}{
\vspace{\useplength{toaddrvpos}}
\vspace{3\baselineskip}
\hspace{-2pt}
\monobox{Last Bill}{\$29.95}
}
}
\end{picture}
}
\begin{document}
\begin{letter}[backaddress=false]{%
Mr Joe Customer\\%
17 Unicorn Avenue\\
Narwhtropilis\\%
Uganda\\%
}
\setkomavar{subject}{Invoice}
\opening{Dear Joe Customer,}
Here is your invoice.
\closing{Regards}
\end{letter}
\end{document}
我似乎得到的错误是：
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
! A <box> was supposed to be here.
<to be read again>
=
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerboxsaved@ foreground
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ main
l.114 \opening{Dear Joe Customer,}
?
! Missing number, treated as zero.
<to be read again>
\pgf@layerbox@ foreground
l.114 \opening{Dear Joe Customer,}
?
Foot of first page
Address (addressee)
Location field: empty
Reference line(s): with fields but without date
Title: no
Subject: before opening
[1] (./test.aux)
)
Output written on test.pdf (1 page).
答案1
在修复 wh1t3 评论中强调的问题后，仍有一个问题尚未解决。答案来自 PGF 手册第 82.3 节（使用层）：
笔记： 你可以不是使用此环境向图层添加任何内容
main。向主图层添加任何内容的唯一方法是在所有环境之外发出图形命令{pgfonlayer}。
该main图层的处理方式与其他图层不同。分层系统的工作原理是将每个图层的命令放入框中，然后按正确的顺序放置这些框。可以不将东西放入框中，并且不在框中的所有内容都会放在图层上main。因此布局机制是：
main按照给定的顺序处理之前列出的所有框。- 处理所有非盒装物品。
main按给定的顺序处理后面列出的所有框。
当你使用\begin{pgfonlayer}{main}时，它会寻找一个可以放东西的盒子。不知什么原因，它确实把东西放进了一个盒子里（它应该闪现一个大霓虹灯标志，上面写着“你正试图使用 pgfonlayer 将东西放在主层上。不要这样做。”）但那个盒子就像去年的圣诞装饰品一样被塞到角落里，再也没有人看过。
所以再试一次，但请确保不要明确使用该main层。如果您仍然遇到问题，请编辑问题以解释这些问题是什么，或者提出新问题。
答案2
实际上，问题在于pgfsetlayers命令中的空格有误。替换
\pgfsetlayers{background, main, foreground}
和
\pgfsetlayers{background,main,foreground}
一切都会好起来的！