面向对象的 MATLAB：来自父级的静态方法无法设置来自子级的受保护属性

Question

好的，所以我有一个父类MOM与一堆属性SetAccess属性设置为protected。它有一个特殊的静态方法setProperty来设置它的属性:

classdef MOM < handle
    properties (SetAccess = 'protected')
        age;
        occupation;
        num_kids;        
        MOMmusthaves ={'age','occupation','num_kids'};
    end
    methods
        function obj = MOM(varargin)            
            if iscell(varargin{1,1})
                varargin =varargin{1,1};
            end
            inputstrings=varargin(cellfun(@isstring,varargin)); % get strings out of the inputs
            if(isempty(setxor(intersect(inputstrings,obj.MOMmusthaves),obj.MOMmusthaves)))
                % if all proper inputs are entered, initialize your object
                for pp =1:length(obj.MOMmusthaves)
                    obj.setProperty(obj,varargin,obj.MOMmusthaves{pp});%find each input in the vararagins, and set it
                end
            else
                display('Hey! These inputs are wrong. type help MOM for an example. Make sure you inlcude inputs for all of the following:');                obj.MOMmusthaves
                return;
            end
        end
    end
    methods (Static)
        function setProperty(obj,varargs,xx)
            eval(sprintf('obj.%s = varargs{find(strcmp(''%s'',varargs))+1};',xx,xx));
        end
    end
end

然后我有一个子对象KID，它有更多的属性，也SetAccess protected。当我尝试使用MOM的静态方法在KID的构造函数内设置KID属性时，我得到一个错误:(错误提示:

不能设置KID的只读属性'allowance'。

基本上，似乎KID不认为它可以使用MOM的静态方法作为自己的(所以没有正确继承它)。

我的问题是:是否有任何方法可以使静态方法被回收并可用于KID自己受保护的属性?

仅供参考，这是KID代码;

classdef KID < MOM
    properties (SetAccess = 'protected')
        gender;
        allowance;
        favoritecandy;
        KIDmusthaves ={'gender','allowance','favoritecandy'};
    end
    methods
        function obj = KID(varargin)
            obj = obj@MOM(varargin(:)); % Special construct for instantiating the superclass
            inputstrings=varargin(cellfun(@isstring,varargin)); % get strings out of the inputs.
            if(isempty(setxor(intersect(inputstrings,obj.KIDmusthaves),obj.KIDmusthaves)))
                % if all proper inputs are entered, initialize your object
                for pp =1:length(obj.KIDmusthaves)
                    %find each input in the vararagins, and set it
                    obj.setProperty(obj,varargin,obj.KIDmusthaves{pp});
                end
            else
                display('please use correct input format. Make sure you include inputs for all of the following:');
                obj.KIDmusthaves
                return;
            end
        end
    end
end

Answer 1

我不确定错误的确切来源是什么;虽然，我认为这可能是由于被eval隐藏的句柄对象的突变。

无论如何，如果我理解setProperty的预期用法，我认为使用点符号(类似于结构体的动态字段名称)以非static形式编写函数可能是最简单的:

methods
    function [] = setProperty(obj,musthaves,varargin)
        keys   = varargin(1:2:end);
        values = varargin(2:2:end); 
        for pp =1:length(keys)
            key = keys{k};
            if any(strcmp(musthaves,key))
                obj.(key) = values{pp};
            end
        end
    end
end

其中musthaves是任何属性字符串的单元格数组你也可以让musthaves是一个字符串，表示obj属性包含属性列表:

methods
    function [] = setProperty(obj,musthaves,varargin)
        keys   = varargin(1:2:end);
        values = varargin(2:2:end); 
        for pp =1:length(keys)
            key = keys{k};
            if any(strcmp(obj.(musthaves),key))
                obj.(key) = values{pp};
            end
        end
    end
end