Matlab单例模式

classdef SingletonClass < handle
    methods(Access = private)
        function obj = SingletonClass()
           disp('SingletonClass construtor called!');
        end
    end
    methods(Static)
        function obj = getIns()
            persistent ins;
            if isempty(ins) || ~isvalid(ins)
                ins = SingletonClass();
            end
            obj = ins;
        end
    end
end