MATLAB GUI给进度条添加取消按钮来中途结束程序

怼烎@ 2022-12-25 02:57 153阅读 0赞

编写程序遇到的问题，中途关闭进度条会报错，加入这个取消代码就好了

%第一种  
    hWaitBar = waitbar(0, '请等待...', 'Name', '进度条', 'CreateCancelBtn' ,'setappdata(gcbf, ''isCanceled'', true)');
    hCancelButton = findall(hWaitBar, 'style', 'pushbutton');
    set(hCancelButton, 'string', '取消', 'fontsize', 8);
    setappdata(hWaitBar, 'isCanceled', false);
    for i = 1 : 100
        waitbar(i / 100, hWaitBar, ['更新' num2str(i) '%']);
        pause(0.1);   
        if getappdata(hWaitBar, 'isCanceled')
            return;
        end
    end
    pause(0.1);
    delete(hWaitBar);
       
    %第二种   
    isCanceled = false;%表征是否按下了取消按钮
    hWaitbar=waitbar(0,'请等待…','Name','进度条','CreateCancelBtn',@Cancelcallback);%创建进度为0的进度条
    btnCancel=findall(hWaitbar,'style','pushbutton');%查找取消按钮
    set(btnCancel,'string','取消','fontsize',10);
    for i=1:100
    waitbar(i/100,hWaitbar,['进度完成',num2str(i),'％']);
    pause(0.1)
         if isCanceled%如果按下了取消按钮，跳出循环
             return;
         end
    end
    
    if  ishandle(hWaitbar)
        delete(hWaitbar)
        clear hWaitbar
    end
    
        function Cancelcallback(~,~)
            isCanceled = true;
        end
    end

![机构][20201130114839594.png]  
结果图  
参考原文：https://www.ilovematlab.cn/thread-244814-1-1.html

[20201130114839594.png]: /images/20221120/0f728f494e2242549c91fa560c8376e0.png