Changing the formatting of subcaption for reference

Question

   \usepackage{subcaption}
    \begin{figure}[t]
    \begin{subfigure}{1\linewidth}
    Figure1
    \caption{Hello}~\label{fig:TBS}
    \end{subfigure}
    \begin{subfigure}{1\linewidth}
    Figure2
    \caption{Hello1}
    \end{subfigure}~\label{fig:TBSCompensate}
    \caption{BigHello}
    \end{figure}

Following is the what appears:

When I use Figure~\ref{fig:TBS} to refer the figure It appears Figure 2a in the pdf, I wish that it could appear as Figure 2(a), is the a way to tweat the formatting of caption for subfigure?

Answer 1

Your case will be handled in the subcaption documentation, section "References":

But if you want detailed control on how the references will look like, the options of \DeclareCaptionSubType are potentially not sufficient. In this case one need to redefine these two macros on his/her own. Some examples: If you want parentheses around the sub-figure part of the reference, so they will look like ‘1(a)’, you may get them this way:

\usepackage[labelformat=simple]{subcaption}
\renewcommand\thesubfigure{(\alph{subfigure})}

(Note: Since parens is the default label format you will get double parentheses in sub-captions if you don't specify a different label format, e.g., simple.)