如何在另一个 .m 文件中访问 MATLAB UI 函数？

我正在尝试通过将一些初始化分离到单独的 .m 文件中来整理我的 MATLAB 应用程序代码。为此，我为每种类型的组件设置了各种文件（例如按钮、图形等的文件）。我正尝试从按钮文件访问主初始化文件中的函数。我的代码在按钮 .m 文件中如下所示：

classdef buttons < handle
    methods
        %initializes the UI
        function buttonCreate(app)
           
            %Create file load 1
            app.fileload1 = uibutton(app.gridLayout, 'push');
            app.fileload1.FontSize = 36;
            app.fileload1.Layout.Row = [8 9];
            app.fileload1.Layout.Column = 1;
            app.fileload1.Text = 'Load 1';

            %proceeds to create the rest of the buttons
        end
    end
end

现在我尝试访问buttonCreate()主初始化文件中的函数initialize.m：

classdef initialize < handle
    properties 
        fig
        gridLayout
        axes

        fileload1
    end
    methods
        %initializes the UI
        function init(app)
            %create canvas
            import buttons.*;
            fig = uifigure;
            fig.Position = [100 100 1920 1080];
            movegui(fig,'center');
            fig.Name = "Audio Editor";

            %Create grid layout
            gridLayout = uigridlayout(fig);
            gridLayout.ColumnWidth = {'1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x'};
            gridLayout.RowHeight = {'1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x', '1x'};

            buttonCreate(app);

        end
    end
    %code for calling and deleting
    methods
        %calls code to create canvas upon app start
        function app = initialize
            init(app)
        end
        %removes the app and deletes app.fig
        function delete(app)
            delete(app.fig);
        end
    end
end

Error in initialize/init (line 41)
            buttonCreate(app);
            ^^^^^^^^^^^^^^^^^^
Error in initialize (line 54)
            init(app)
            ^^^^^^^^^

这导致程序UIFigure仍在创建，但没有按钮，并且终端出现上述错误。