Hi, I understand that you want to add a date picker to the main app window and trigger an action whenever the date is changed using “ValueChangedFcn” callback function.
This issue can be resolved by using a function handle for the callback instead of directly invoking the function in the “ValueChangedFcn”. Additionally, confirm that the callback function is designed to accept the necessary input arguments.
methods (Access = private)
function test(app, src, event)
uialert(app.UIFigure, 'It works!', 'It works!', 'Icon', 'info'); % I have changed 'help' to 'info' here
end
end
% You can use the below code in runStartupFcn
uidatepicker(app.UIFigure, ...
'Position', [100 100 150 22], ...
'ValueChangedFcn', @(src, event) test(app, src, event));
Moreover, "help" used for the value of "Icon" parameter might not be valid, if it is not created explicitly, you can also use an icon from the set of predefined icons provided by MATLAB.
You can also refer to the below documentations for more details:
- Predefined Icon in “uialert” : https://www.mathworks.com/help/releases/R2024b/matlab/ref/uialert.html#:~:text=a%20custom%20icon.-,Predefined%20Icon,-This%20table%20lists
- Create a callback for date selection in “uidatepicker”: https://www.mathworks.com/help/releases/R2024b/matlab/ref/uidatepicker.html#:~:text=Sundays%20are%20disabled.-,Create%20a%20Callback%20for%20Date%20Selection,-Input%20Arguments
- Create a custom Icon in “uialert”: https://www.mathworks.com/help/releases/R2024b/matlab/ref/uialert.html#:~:text=No%20icon%20displays.-,Custom%20Icon,-Specify%20a%20custom
