documentclass{beamer}

usepackage[
%   style=numeric,
%   style=numeric-comp,
%   style=numeric-verb,
%   style=authoryear,
    style=authoryear-comp,
%   style=authoryear-ibid,
%   style=authoryear-icomp,
]{biblatex}

addbibresource{biblatex-examples.bib}

makeatletter
newcommand{fixnumericstyles}{%
    setbeamertemplate{bibliography item}{insertbiblabel}
}

newcommand{fixauthoryearstyles}{%
    newlength{beamer@bibiconwidth}
    settowidthbeamer@bibiconwidth{usebeamertemplate*{bibliography item}}
    setlength{labelwidth}{-beamer@bibiconwidth}
    addtolength{labelwidth}{2labelsep}
    addtolength{bibhang}{labelsep}
}

% Numeric styles %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
defbeamer@namenumeric{numeric}
ifxblx@bbxfilebeamer@namenumeric
    fixnumericstyles
fi
%
defbeamer@namenumericcomp{numeric-comp}
ifxblx@bbxfilebeamer@namenumericcomp
    fixnumericstyles
fi
%
defbeamer@namenumericverb{numeric-verb}
ifxblx@bbxfilebeamer@namenumericverb
    fixnumericstyles
fi
%
% author year styles %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
defbeamer@nameauthoryear{authoryear}
ifxblx@bbxfilebeamer@nameauthoryear
    fixauthoryearstyles
fi
defbeamer@nameauthoryear{authoryear-comp}
ifxblx@bbxfilebeamer@nameauthoryear
    fixauthoryearstyles
fi
defbeamer@nameauthoryear{authoryear-ibid}
ifxblx@bbxfilebeamer@nameauthoryear
    fixauthoryearstyles
fi
defbeamer@nameauthoryear{authoryear-icomp}
ifxblx@bbxfilebeamer@nameauthoryear
    fixauthoryearstyles
fi
makeatother
begin{document}

begin{frame}{}
cite{sigfridsson}
printbibliography
end{frame}


end{document}