matlab app 设置代码设置按钮强制中断程序

在MATLAB App Designer中，可以通过编写回调函数来实现按钮强制中断程序的功能。以下是一个简单的示例，展示了如何在按钮的回调函数中设置一个标志位来中断程序的执行。

1. 在App Designer中，添加一个按钮和一个标签。按钮的文本可以设置为“停止程序”，标签用于显示程序的状态。

2. 在按钮的回调函数中，设置一个标志位（例如，`stopFlag`）来指示程序应该停止执行。

3. 在需要中断的程序代码中，定期检查这个标志位。如果标志位被设置为`true`，则使用`return`语句退出当前函数。

以下是一个具体的示例代码：

classdef InterruptExampleApp < matlab.apps.AppBase

    % Properties that correspond to app components
    properties (Access = public)
        UIFigure             matlab.ui.Figure
        StartButton          matlab.ui.control.Button
        StopButton           matlab.ui.control.Button
        StatusLabel          matlab.ui.control.Label
    end
    
    properties (Access = private)
        stopFlag = false;   % Flag to indicate if the program should stop
    end
    
    methods (Access = private)

        % Button pushed function: StartButton
        function StartButtonPushed(app, event)
            app.StatusLabel.Text = '程序运行中...';
            pause(1);  % Simulate some work
            
            for i = 1:10
                if app.stopFlag
                    app.StatusLabel.Text = '程序已停止';
                    return;
                end
                fprintf('迭代次数: %d\n', i);
                pause(0.5);  % Simulate some work
            end
            
            app.StatusLabel.Text = '程序完成';
        end

        % Button pushed function: StopButton
        function StopButtonPushed(app, event)
            app.stopFlag = true;
        end
    end

    % Component initialization
    methods (Access = private)

        % Create UIFigure and components
        function createComponents(app)

            % Create UIFigure and hide until all components are created
            app.UIFigure = uifigure('Visible', 'off');
            app.UIFigure.Position = [100 100 400 300];
            app.UIFigure.Name = 'MATLAB App';

            % Create StartButton
            app.StartButton = uibutton(app.UIFigure, 'push');
            app.StartButton.ButtonPushedFcn = createCallbackFcn(app, @StartButtonPushed, true);
            app.StartButton.Position = [100 200 100 22];
            app.StartButton.Text = '开始程序';

            % Create StopButton
            app.StopButton = uibutton(app.UIFigure, 'push');
            app.StopButton.ButtonPushedFcn = createCallbackFcn(app, @StopButtonPushed, true);
            app.StopButton.Position = [200 200 100 22];
            app.StopButton.Text = '停止程序';

            % Create StatusLabel
            app.StatusLabel = uilabel(app.UIFigure);
            app.StatusLabel.Position = [150 150 100 22];
            app.StatusLabel.Text = '状态: ';

            % Show the figure after all components are created
            app.UIFigure.Visible = 'on';
        end
    end

    % App initialization and construction
    methods (Access = public)

        % Construct app
        function app = InterruptExampleApp

            % Create and configure components
            createComponents(app)

            % Register the app with App Designer
            registerApp(app, app.UIFigure)

            if nargout == 0
                clear app
            end
        end

        % Code that executes before app deletion
        function delete(app)

            % Delete UIFigure when app is deleted
            delete(app.UIFigure)
        end
    end
end

在这个示例中，`StartButtonPushed`函数模拟了一个长时间运行的任务，并通过定期检查`stopFlag`标志位来实现中断功能。`StopButtonPushed`函数用于设置`stopFlag`标志位，从而触发中断。