Coloração de células (destaque) com efeitos in-out em uma tabela no beamer

Question

Preciso de coloração de célula (ou efeito de destaque) em uma célula de uma tabela embeamerdepois de um clique (quero dizer, estou planejando falar sobre algo nesse quadro e vou enfatizar apenas um número em uma célula no final da minha palestra), e tentei muitos comandos como \onslide<>, \only<>, \visible<>e novos comandos use \colorboxmas qualquer um deles funcionou. Por fim, me deparei com alguns\rowcolor<>{colorname}códigos e tentei organizar esses códigos (sem conhecer completamente a estrutura do novo comando) para coloração de células com efeitos de entrada e saída, mas há algo errado, então recebi um erro como esse

Perdido \noalign.

Qual é o problema com isso?

\documentclass[xcolor=table]{beamer}

\rowcolors{1}{gray!30}{gray!10}

\makeatletter
\def\rowcolor{\noalign{\ifnum0=`}\fi\bmr@rowcolor}
\newcommand<>{\bmr@rowcolor}{%
    \alt#1%
        {\global\let\CT@do@color\CT@@do@color\@ifnextchar[\CT@rowa\CT@rowb}% 
        {\ifnum0=`{\fi}\@gooble@rowcolor}% 
}

\newcommand{\@gooble@rowcolor}[2][]{\@gooble@rowcolor@}
\newcommand{\@gooble@rowcolor@}[1][]{\@gooble@rowcolor@@}
\newcommand{\@gooble@rowcolor@@}[1][]{\ignorespaces}
\makeatother

\makeatletter
\def\cellcolor{\noalign{\ifnum0=`}\fi\bmr@cellcolor}
\newcommand<>{\bmr@cellcolor}{%
    \alt#1%
        {\global\let\CT@do@color\CT@@do@color\@ifnextchar[\CT@rowa\CT@rowb}% 
        {\ifnum0=`{\fi}\@gooble@cellcolor}% 
}

\newcommand{\@gooble@cellcolor}[2][]{\@gooble@cellcolor@}
\newcommand{\@gooble@cellcolor@}[1][]{\@gooble@cellcolor@@}
\newcommand{\@gooble@cellcolor@@}[1][]{\ignorespaces}
\makeatother

\begin{document}
\begin{frame}{The MWE}%

\only<2>{\rowcolors{1}{blue!30}{blue!10}}
\only<1,3>{\rowcolors{1}{gray!30}{gray!10}}

\begin{center}
\begin{tabular}{cc}
    A & B \\
    A & B \\
    A & B \\
    \rowcolor<4>{green} C & D \\
    \rowcolor<4,5>{yellow} E & F \\
    \rowcolor<4-6>{green} G & H \\
    \rowcolor<6>{red} Y & S \\
    A & B \
\end{tabular}
\end{center}

\par    
\visible<1>{Testing default row colouring ... \\}
\visible<2,3>{Testing change of default colors ...\\}
\visible<4-6>{Testing in-out of custom colors ...\\ (caution: The order of defaults colors can change)\\}

\vfill
\scriptsize{
 Based of answer of Martin Scharrer
 \url{https://tex.stackexchange.com/questions/18427/why-cant-i-wrap-rowcolor-in-only-beamer}}

\end{frame} 

\begin{frame}{Cell Coloring with In-out Effects}
   \begin{center}
   \begin{tabular}{cc}
    A & B \\
    C & \cellcolor<3>{green} C \\
    D & E \\
    F & G \
    \end{tabular}
    \end{center}
    \end{frame}

\end{document}

Answer 1

Exclua o \noaligncomando da definição de \cellcolor:

\documentclass[xcolor=table]{beamer}

\rowcolors{1}{gray!30}{gray!10}

\makeatletter
\def\rowcolor{\noalign{\ifnum0=`}\fi\bmr@rowcolor}
\newcommand<>{\bmr@rowcolor}{%
    \alt#1%
        {\global\let\CT@do@color\CT@@do@color\@ifnextchar[\CT@rowa\CT@rowb}% 
        {\ifnum0=`{\fi}\@gooble@rowcolor}% 
}

\newcommand{\@gooble@rowcolor}[2][]{\@gooble@rowcolor@}
\newcommand{\@gooble@rowcolor@}[1][]{\@gooble@rowcolor@@}
\newcommand{\@gooble@rowcolor@@}[1][]{\ignorespaces}
\makeatother



\makeatletter
\def\cellcolor{{\ifnum0=`}\fi\bmr@cellcolor}
\newcommand<>{\bmr@cellcolor}{%
    \alt#1%
        {\global\let\CT@do@color\CT@@do@color\@ifnextchar[\CT@rowa\CT@rowb}% 
        {\ifnum0=`{\fi}\@gooble@cellcolor}% 
}

\newcommand{\@gooble@cellcolor}[2][]{\@gooble@cellcolor@}
\newcommand{\@gooble@cellcolor@}[1][]{\@gooble@cellcolor@@}
\newcommand{\@gooble@cellcolor@@}[1][]{\ignorespaces}
\makeatother


\begin{document}
\begin{frame}{The MWE}%

\only<2>{\rowcolors{1}{blue!30}{blue!10}}
\only<1,3>{\rowcolors{1}{gray!30}{gray!10}}

\begin{center}
\begin{tabular}{cc}
    A & B \\
    A & B \\
    A & B \\
    \rowcolor<4>{green} C & D \\
    \rowcolor<4,5>{yellow} E & F \\
    \rowcolor<4-6>{green} G & H \\
    \rowcolor<6>{red} Y & S \\
    A & B \\

\end{tabular}
\end{center}

\par    
\visible<1>{Testing default row colouring ... \\}
\visible<2,3>{Testing change of default colors ...\\}
\visible<4-6>{Testing in-out of custom colors ...\\ (caution: The order of defaults colors can change)\\}

\vfill
\scriptsize{
 Based of answer of Martin Scharrer
 \url{http://tex.stackexchange.com/questions/18427/why-cant-i-wrap-rowcolor-in-only-beamer}}

\end{frame} 

\begin{frame}{Cell Coloring with In-out Effects}
   \begin{center}
   \begin{tabular}{cc}
    A & B \\
    C & \cellcolor<3>{green} C \\
    D & E \\
    F & G \\

    \end{tabular}
    \end{center}
    \end{frame}

\end{document}