带有左箭头的问题答案不会跨越以下页面

Question

我参考了这个问题： 软件包 pgfkeys：我不知道密钥“/tcb/O”，我将忽略它 并接受答案。如果问题和/或答案的文本跨越下一页，如下所示：

左箭头未跨越下一页（两个 tcolobox 都可破坏）。我们能解决这个问题吗？

Answer 1

您需要声明breakable盒子，并将侧线调整为相应类型的盒子：不间断、第一个、中间或最后一个。

\documentclass{article}
\usepackage[margin=2cm]{geometry}
\usepackage[T1]{fontenc}
\usepackage{tcolorbox,tikz}
\usepackage{lipsum,lmodern}
\usetikzlibrary{calc}
\tcbuselibrary{skins,listings,breakable,poster}


\newtcolorbox[auto counter]{example}[2]{%
    enhanced, breakable,
    left skip=1cm,attach boxed title to top text left={yshift=-\tcboxedtitleheight/2,yshifttext=-2mm},
    boxed title style={colframe=#1!40!white,arc=3mm},
    colback=#1!10!white,colframe=#1!10!white,coltitle=black,colbacktitle=#1!10!white,
    fonttitle=\bfseries,
    title=Example,
    underlay boxed title={
        \node [circle,fill=#1!10!white,draw=#1!40!white,inner sep=1pt] (A) at ($(title.west) + (-8mm,0)$){\thetcbcounter};
     },
     underlay unbroken={
        \draw[#1!40!white,-{stealth}] (title.west) -- (A) --  (frame.south west-|A);},
     underlay first={
        \draw[#1!40!white] (title.west) -- (A) --  (frame.south west-|A);},
     underlay middle={
        \draw[#1!40!white] (frame.north west-|A) --  (frame.south west-|A);},
     underlay last={
        \draw[#1!40!white,-{stealth}] (frame.north west-|A) --  (frame.south west-|A);},
        #2
}


\newtcolorbox[auto counter]{sol}[2]
{%
    enhanced, breakable,
    left skip=1cm,attach boxed title to top text left={yshift=-\tcboxedtitleheight/2,yshifttext=-2mm},
    boxed title style={colframe=#1!40!white,arc=3mm},
    colback=#1!10!white,colframe=#1!10!white,coltitle=black,colbacktitle=#1!10!white,
    fonttitle=\bfseries,
    title=Solution,
    underlay boxed title={
        \node [circle,fill=#1!10!white,draw=#1!40!white,inner sep=1pt] (A) at ($(title.west) + (-8mm,0)$){\thetcbcounter};
     },
     underlay unbroken={
        \draw[#1!40!white,-{stealth}] (title.west) -- (A) --  (frame.south west-|A);},
     underlay first={
        \draw[#1!40!white] (title.west) -- (A) --  (frame.south west-|A);},
     underlay middle={
        \draw[#1!40!white] (frame.north west-|A) --  (frame.south west-|A);},
     underlay last={
        \draw[#1!40!white,-{stealth}] (frame.north west-|A) --  (frame.south west-|A);},
        #2
}



\begin{document}


\begin{example}{blue}{}
    Our Example
    
    \lipsum[1-20]
\end{example}


\begin{sol}{red}{}
    here is the solution
    
    \lipsum[1-3]
\end{sol}

\end{document}