How to make a DropDown function control the visibility of a spinner in App designer

Question

anja pedersen 2017-4-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/337627-how-to-make-a-dropdown-function-control-the-visibility-of-a-spinner-in-app-designer

回答： Tushar Upadhyay 2017-5-2

Hi,

I am New to App Designer and i would like to make one item in the DroppDown function to make a spinner visible. Is this possible? What I have tried so far is this:

            Value= app.InstrumentDropDown.Value;
            if Value==1
              app.AntalldypSpinner.Visible='off'
            elseif Value==2
                     app.instrument='D';
                     app.AntalldypSpinner.Visible='on'
            elseif Value==3
                     app.instrument='D';
                     app.AntalldypSpinner.Visible='off'
            elseif Value==4
                    app.instrument='R';
                    app.AntalldypSpinner.Visible='off'
            end

but this only make the spinner disappear and it never shows up again. Can someone help me?

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Answer 1

Tushar Upadhyay 2017-5-2

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/337627-how-to-make-a-dropdown-function-control-the-visibility-of-a-spinner-in-app-designer#answer_265416

The app.InstrumentDropDown.Value might be giving value in "char" instead of numeric. Make sure that the value is numeric. If it is a char then change the If statement as below:

if Value=='1' app.AntalldypSpinner.Visible='off'

If that does not work, then add the debug point in the function and see if it is going into the appropriate conditional statement.