tcolorbox 包中的範例出現問題

Question

當我嘗試運行手冊中的這個簡單範例時：

\documentclass{report}
\begin{document}
\tcbset{frame style={top color=red!20!white,
                     bottom color=red!20!white!75!black},
        fonttitle=\bfseries,coltitle=black}

\begin{tcolorbox}[enhanced,title=My title,interior hidden]
This is a \textbf{tcolorbox}.
\tcblower
This is the lower part.
\end{tcolorbox}
\end{document}

我收到一個奇怪的錯誤：

---

! Package pgfkeys Error: I do not know the key '/tcb/frame style', to which you
 passed 'top color=red!20!white, bottom color=red!20!white!75!black', and I am
going to ignore it. Perhaps you misspelled it.

See the pgfkeys package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                             

l.82         fonttitle=\bfseries,coltitle=black}

-------------------------------------------------------------------------------------------------

我在 Stack Exchange 和其他論壇上讀到，問題是 的過時版本，但我正在運行和 的tcolorbox最新版本，這裡是日誌檔案中的插入內容：tcolorboxPGF

Package: tcolorbox 2015/03/16 version 3.50 text color boxes

Package: pgf 2013/12/18 v3.0.0 (rcs-revision 1.14)

任何人都可以闡明這個問題嗎？

Answer 1

您必須加載適當的庫才能frame style進行鍛鍊。這裡是skins。如果有疑問，您可以新增most或many作為選項tcolorbox

\documentclass{report}
\usepackage[skins]{tcolorbox}
%\usepackage[most]{tcolorbox}
\begin{document}
\tcbset{frame style={top color=red!20!white,
                     bottom color=red!20!white!75!black},
        fonttitle=\bfseries,coltitle=black}

\begin{tcolorbox}[enhanced,title=My title,interior hidden]
This is a \textbf{tcolorbox}.
\tcblower
This is the lower part.
\end{tcolorbox}
\end{document}