Gui Matlab中的切换按钮

在您当前的计数器实现中，首次按下按钮进行计数时while，将startStop_togglebutton激活回调中的循环Start。

它会一直运行，直到条件（计数器<10）成立为止，即使您再次按下Stop计数按钮也是如此。

因此，要解决这个问题，你可以使用value的的startStop_togglebuttoninsted的的“ 1”递增计数器。

在下面，您可以找到回调的更新版本。我还添加了几个“ if”块来管理字符串在statusbar

% --- Executes on button press in startStop_togglebutton.
function startStop_togglebutton_Callback(hObject, eventdata, handles)
% hObject    handle to startStop_togglebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of startStop_togglebutton

% hObject    handle to startStop_togglebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of startStop_togglebutton

persistent counter ;

if isempty(counter)

    counter = 0 ;

end

button_state = get(hObject,'Value');

if button_state == get(hObject,'Max')

    set(handles.startStop_togglebutton,'String','Stop','ForegroundColor','red')

    setappdata(handles.startStop_togglebutton,'sw',1)

    while counter < 10
%
% Inserted acquisition of button state within the while loop
%
       button_state = get(hObject,'Value');
%
% Modified the counter increment:
%    the increment is based on the status of the button
%
%        counter = counter+1;
       counter = counter+button_state;
%
% Added "if" condition
%    The "statusbar" is updated only if counting is on
%
       if(button_state)
           set(handles.statusBar,'String',strcat(['the counter = ' num2str(counter) ]))
       end

       pause(1)
    end

%
% Added "if" condition
%    The "statusbar" is updatred only if counting is finished
%
if(counter == 10)
    set(handles.startStop_togglebutton,'String','Finished','ForegroundColor','cyan')
end

elseif button_state == get(hObject,'min')

    set(handles.startStop_togglebutton,'string','resume','foregroundcolor','blue')

    setappdata(handles.startStop_togglebutton,'sw',0)
    set(handles.statusBar,'String',strcat([' stopped & the counter = ' num2str(counter) ' !']))

end

更新评论

之所以使用value的togglebutton递增计数器如下。

首次按下来togglebutton启动计数器时，while无论循环是否完成，循环都会被激活，并且GUI正在“等待”另一个回调。

此外，while循环已被编码到if捕获Start / Continue操作的块中。

这意味着当您按下切换按钮停止计数器时，将跳过while循环。

通过在while循环中获取切换按钮的值，可以独立于预期的动作（停止/重新启动）捕获按钮状态的变化。

确实，当您将其按入“停止”计数器时，将value设置为，0因此当您按其重新启动时，它不会递增计数器，其值将设置为1并且计数器会递增。

我建议以其他方式对计数器GUI进行建模：

• 将计数器编码在单独的“ .m”文件（或函数）中
• 要在此“ .m”文件中编写计数器增量的逻辑（基于value切换按钮的）
• 添加一个用于运行计数器的按钮（“ .m”文件）
• 要startStop_togglebutton仅使用callbach来更新string切换按钮上的显示

通过使用该guidata函数，可以在GUI和“ .m”文件之间处理数据。

他们”。文件通过其GUI来标识GUI tag（在我用来测试解决方案的代码中，我将GUI图形设置tag为counter_gui）。

您还应该HandleVisibility将GUI的属性设置为“ on”。

在下面您可以找到：

• 更新的startStop_togglebutton回调，现在非常简单
• 用于启动计数器的按钮的回调
• “ .m”文件chitch管理计数器

startStop_togglebutton回调

% --- Executes on button press in startStop_togglebutton.
function startStop_togglebutton_Callback(hObject, eventdata, handles)
% hObject    handle to startStop_togglebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of startStop_togglebutton

% hObject    handle to startStop_togglebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of startStop_togglebutton

button_state = get(hObject,'Value');

if(button_state == 1)
   set(handles.startStop_togglebutton,'String','Stop','ForegroundColor','red')
else
    set(handles.startStop_togglebutton,'string','resume','foregroundcolor','blue')
end

run_counter回调

% --- Executes on button press in run_counter.
function run_counter_Callback(hObject, eventdata, handles)
% hObject    handle to run_counter (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

set(handles.startStop_togglebutton,'enable','on');
set(handles.startStop_togglebutton,'Value',1);
set(handles.run_counter,'enable','off');
% Run the counter ".m" file
run_counter;

“ .m”文件管理计数器

% Get tha handle of the GUI figure
gui_h=findobj('tag','counter_gui');
% Get gudata
gui_my_data=guidata(gui_h);

counter=0;
while(counter < 10)
   % Get togglebutton value
   button_status=get(gui_my_data.startStop_togglebutton,'value');
   % Increment to counter only if the togglebutton is set to "Start/Resume"
   counter=counter+button_status;
   % Update strings
   if(button_status)
      set(gui_my_data.startStop_togglebutton,'String','Stop','ForegroundColor','red')
      set(gui_my_data.statusBar,'String',strcat(['the counter = ' num2str(counter) ]))
   else
      set(gui_my_data.statusBar,'String',strcat([' stopped & the counter = ' num2str(counter) ' !']))
   end
   pause(1);
end

set(gui_my_data.startStop_togglebutton,'String','Finished','ForegroundColor','cyan')
set(gui_my_data.startStop_togglebutton,'enable','off');
set(gui_my_data.run_counter,'enable','on');

希望这可以帮助。