tikzpicture 问题对齐形状和获取正确的箭头

Question

我没能按预期完成这项工作：

\begin{frame}{\textarabic{\emph{دیکشنری}}}
     \centering
   \begin{tikzpicture}[approach/.style={draw,very thick, text width=8em,
            text centered, minimum height=2.5em,rounded corners=3ex},
         idea/.style={draw, very thick, circle,text width=3em,
            text centered, minimum height=2.5em},
         connections/.style={<->,draw=black!30,line width=3pt,shorten <=5pt,shorten >=5pt},
      ]

      % Draw diagram elements
      \node (idea) [idea,draw=blue,fill=blue!20]  {\textarabic{\textbf{دیکشنری مناسب}}};
      \pause
         \node (verbal) [approach,above=of idea]  {\textarabic{\textbf{استخراج ویژگی‌های برجسته‌ی کلاسی از داده‌ها}}};
         \node (formular)[approach,below=of idea] {\textarabic{\textbf{تنک کننده}}};

         % Draw arrows between elements
         \draw[connections] (idea) -- (formular) ;
         \draw[connections] (idea) -- (verbal);
         \draw[connections] (verbal.west) to[out=80,in=60](formular.west) ;
         \draw[connections] (verbal.east) to[out=80,in=60](formular.east) ;
   \end{tikzpicture}

\end{frame}

我希望箭头看起来像这样（不是红色，而是相同的灰色）并且整个箭头对齐中心：

我也希望这三种形状逐一出现，但我真的不知道如何使用pause或这里的任何其他功能。

Answer 1

主题：仅提供您的代码片段，对于愿意帮助您的人来说没有什么帮助。

就你的情况而言，你在几何方面有问题。根据你的喜好，你对角度的定义是错误的out......in

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{positioning}

    \begin{document}
\begin{frame}{arabic text}
     \centering
   \begin{tikzpicture}[
  approach/.style = {draw,very thick, text width=8em,
                     text centered, minimum height=2.5em,rounded corners=3ex},
       idea/.style = {draw, very thick, circle,text width=3em,
                      text centered, minimum height=2.5em},
connections/.style = {<->,draw=black!30,line width=3pt,
                      shorten <=5pt,shorten >=5pt},
                        ]
      % Draw diagram elements
\node (idea) [idea,draw=blue,fill=blue!20]  {arabic text};
      \pause
\node (verbal) [approach,above=of idea] {more arabic text};
\node (formular)[approach,below=of idea] {more arabic text};
% Draw arrows between elements
\draw[connections] (idea) -- (formular) ;
\draw[connections] (idea) -- (verbal);
\draw[connections] (verbal.west) to[out=210,in=150](formular.west);% changed angles
\draw[connections] (verbal.east) to[out=330,in=30](formular.east) ;% changed angles
   \end{tikzpicture}
\end{frame}
    \end{document}