Writing callback for a pushbutton

Question

Zsolt Lord 2013-5-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/76881-writing-callback-for-a-pushbutton

So I'm trying to calculate a sum to a custom N, which a user writes into a uicontrol/edit field, but I can't seem to get the callback right.

This is how I create the edit field:

handles.M1_8.up = uicontrol ('Style','edit',...
                  'String','n',...
                  'FontSize',10,...
                  'Position',[215 415 50 20]);

And this is the pushbutton:

handles.M1_8.calculate = uicontrol ('Style','pushbutton',...
                  'String','Calculate',...
                  'Position',[320 305 60 25],...
                  'Callback',@(~,~,handles) (calculate8_Callback(handles)));

And here's my function it's supposed to execute when pressing the Calculate button:

function calculate8_Callback(handles)
val = str2num(get(handles.M1_7.up,'String'));

Now, when I click the button, it says "Not enough input arguments." to the line where I wrote the callback to the pushbutton.

Any ideas why it's not working.

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Answer 1

Sean de Wolski 2013-5-24

1
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https://ww2.mathworks.cn/matlabcentral/answers/76881-writing-callback-for-a-pushbutton#answer_86524

在 MATLAB Online 中打开

The issue is in how you created the callback:

handles.M1_8.calculate = uicontrol ('Style','pushbutton',...
                'String','Calculate',...
                'Position',[320 305 60 25],...
                'Callback',@(~,~,handles) (calculate8_Callback(handles)));