为什么我的 Tikz 无法在独立文档类中显示颜色？但是颜色可以在文章类中显示。
这是我遵循的代码例如：生锈的铁
% Rusting Iron
% Author: Jason Waskiewicz
% A "jazzy" picture of the stages of rust (presented for a high school level).
% Iron is red, oxygen is blue and electrons are black. At the left you see
% iron atoms with two oxygen molecules, then the electrons go to the oxygen molecules
% leaving oxygen ions and iron ions which then disolve.
\documentclass{article}
\usepackage[usenames,dvipsnames]{xcolor}
\usepackage{standalone}
% Load all packages needed for all sub−files:
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[
>=stealth,
iron/.style={shade, ball color=red},
electron/.style={shade, ball color=green},
oxygen/.style={shade, ball color=blue},
droplet/.style={ball color=blue!20, opacity=0.4},
]
\begin{scope} % Energy levels
\draw (0,0) node[left] {$y=0$} --
++(10.8,0) ;%node[right] {$0,108$}
\draw (0,1.6) node[left] {$y=16$} --
++(10.8,0) ; %node[right] {$16,108$}
\end{scope}
\foreach \x in {0.200000, 0.500000, 0.800000, 1.100000, 2.900000, 3.200000, 3.500000, 3.800000, 5.600000, 5.900000, 6.200000, 6.500000, 8.300000, 8.600000, 8.900000, 9.200000}
\draw [iron] (\x,0,0) circle (0.2cm);
\foreach \x in {1.400000, 4.100000, 6.800000, 9.500000}
\draw [electron] (\x,0,0) circle (0.2cm);
\foreach \x in {1.700000, 2.000000, 2.300000, 2.600000, 4.400000, 4.700000, 5.000000, 5.300000, 7.100000, 7.400000, 7.700000, 8.000000, 9.800000, 10.100000, 10.400000, 10.700000}
\draw [oxygen] (\x,0,0) circle (0.2cm);
\end{tikzpicture}
\end{document}
结果是这样的：
但是如果我将该类改为独立类，代码如下：
% Rusting Iron
% Author: Jason Waskiewicz
% A "jazzy" picture of the stages of rust (presented for a high school level).
% Iron is red, oxygen is blue and electrons are black. At the left you see
% iron atoms with two oxygen molecules, then the electrons go to the oxygen molecules
% leaving oxygen ions and iron ions which then disolve.
\documentclass{standalone}
\usepackage[usenames,dvipsnames]{xcolor}
% Load all packages needed for all sub−files:
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[
>=stealth,
iron/.style={shade, ball color=red},
electron/.style={shade, ball color=green},
oxygen/.style={shade, ball color=blue},
droplet/.style={ball color=blue!20, opacity=0.4},
]
\begin{scope} % Energy levels
\draw (0,0) node[left] {$y=0$} --
++(10.8,0) ;%node[right] {$0,108$}
\draw (0,1.6) node[left] {$y=16$} --
++(10.8,0) ; %node[right] {$16,108$}
\end{scope}
\foreach \x in {0.200000, 0.500000, 0.800000, 1.100000, 2.900000, 3.200000, 3.500000, 3.800000, 5.600000, 5.900000, 6.200000, 6.500000, 8.300000, 8.600000, 8.900000, 9.200000}
\draw [iron] (\x,0,0) circle (0.2cm);
\foreach \x in {1.400000, 4.100000, 6.800000, 9.500000}
\draw [electron] (\x,0,0) circle (0.2cm);
\foreach \x in {1.700000, 2.000000, 2.300000, 2.600000, 4.400000, 4.700000, 5.000000, 5.300000, 7.100000, 7.400000, 7.700000, 8.000000, 9.800000, 10.100000, 10.400000, 10.700000}
\draw [oxygen] (\x,0,0) circle (0.2cm);
\end{tikzpicture}
\end{document}
结果是这样的，没有任何颜色：
那么我该如何调整它以在独立类中显示颜色？
因为我需要将图片作为独立图片插入到我的latex文档中，以便稍后上传图片。
答案1
我知道问题所在。如果我使用，XeLaTeX我无法获得该颜色，但如果我将其更改XeLaTeX为该PDFLaTeX 颜色，则颜色会恢复原样，尽管我不知道原因。
但这可以解决问题。