设计APP

主界面

函数方法

定时器

classdef MemoryMonitorAppExample < matlab.apps.AppBase% Properties that correspond to app componentsproperties (Access = public)UIFigure     matlab.ui.FigureStopButton   matlab.ui.control.ButtonStartButton  matlab.ui.control.ButtonSubtitle     matlab.ui.control.LabelTitle        matlab.ui.control.LabelUIAxes       matlab.ui.control.UIAxesendproperties (Access = private)RandTimer          % Timer objectPlotLine           % Line objectendmethods (Access = private)function RandTimerFcn(app,~,~)% Generate a random numberrandnum = rand;% Update YData in plotydata = app.PlotLine.YData;ydata = circshift(ydata,1);ydata(1) = randnum;app.PlotLine.YData = ydata;end        end% Callbacks that handle component eventsmethods (Access = private)% Code that executes after component creationfunction startupFcn(app)% Configure x- and y- axisapp.UIAxes.XLim = [0 60];app.UIAxes.XDir = "reverse";app.UIAxes.YLim = [0 1];% Initial plot is all zerosapp.PlotLine = plot(app.UIAxes,0:60,zeros(1,61));% Create timer objectapp.RandTimer = timer(..."ExecutionMode", "fixedRate", ...    % Run timer repeatedly"Period", 1, ...                     % Period is 1 second"BusyMode", "queue",...              % Queue timer callbacks when busy"TimerFcn", @app.RandTimerFcn);      % Specify callback functionend% Button pushed function: StartButtonfunction StartButtonPushed(app, event)% If timer is not running, start itif strcmp(app.RandTimer.Running, "off")start(app.RandTimer);endend% Button pushed function: StopButtonfunction StopButtonPushed(app, event)% Stop the timerstop(app.RandTimer);end% Close request function: UIFigurefunction UIFigureCloseRequest(app, event)% Stop timer, then delete timer and appstop(app.RandTimer);delete(app.RandTimer);delete(app);endend% Component initializationmethods (Access = private)% Create UIFigure and componentsfunction createComponents(app)% Create UIFigure and hide until all components are createdapp.UIFigure = uifigure('Visible', 'off');app.UIFigure.Position = [100 100 640 480];app.UIFigure.Name = 'Random Number Generator';app.UIFigure.Resize = 'off';app.UIFigure.CloseRequestFcn = createCallbackFcn(app, @UIFigureCloseRequest, true);% Create UIAxesapp.UIAxes = uiaxes(app.UIFigure);xlabel(app.UIAxes, 'Seconds')ylabel(app.UIAxes, 'Random number calculated')app.UIAxes.XTickLabelRotation = 0;app.UIAxes.YTickLabelRotation = 0;app.UIAxes.ZTickLabelRotation = 0;app.UIAxes.Box = 'on';app.UIAxes.XGrid = 'on';app.UIAxes.YGrid = 'on';app.UIAxes.Position = [53 100 508 300];% Create Titleapp.Title = uilabel(app.UIFigure);app.Title.HorizontalAlignment = 'center';app.Title.FontSize = 16;app.Title.Position = [267 430 108 22];app.Title.Text = 'Output of rand';% Create Subtitleapp.Subtitle = uilabel(app.UIFigure);app.Subtitle.Position = [253 409 140 22];app.Subtitle.Text = 'Calculated Every Second';% Create StartButtonapp.StartButton = uibutton(app.UIFigure, 'push');app.StartButton.ButtonPushedFcn = createCallbackFcn(app, @StartButtonPushed, true);app.StartButton.Position = [197 59 100 22];app.StartButton.Text = 'Start';% Create StopButtonapp.StopButton = uibutton(app.UIFigure, 'push');app.StopButton.ButtonPushedFcn = createCallbackFcn(app, @StopButtonPushed, true);app.StopButton.Position = [348 59 100 22];app.StopButton.Text = 'Stop';% Show the figure after all components are createdapp.UIFigure.Visible = 'on';endend% App creation and deletionmethods (Access = public)% Construct appfunction app = MemoryMonitorAppExample% Create UIFigure and componentscreateComponents(app)% Register the app with App DesignerregisterApp(app, app.UIFigure)% Execute the startup functionrunStartupFcn(app, @startupFcn)if nargout == 0clear appendend% Code that executes before app deletionfunction delete(app)% Delete UIFigure when app is deleteddelete(app.UIFigure)endend
end