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prompt a GUI user to enter different values

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Rich006
Rich006 2023-4-19
评论： Adam Danz 2023-4-20
I am using App Designer to write a GUI wrapper for an existing app. The app should load some data based on the user input. If the user input is invalid, how can I make the user try again? For example, the user entered an end time that is not after the previously entered starting time. Or as a simpler example, the user entered a string that is not one of the valid responses.

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Adam Danz
Adam Danz 2023-4-19
Put your dialog in a while-loop that exits when the input conditions are met and regenerates the dialog if the conditions are not met.
Here is an example using input() which generates a prompt in the command window rather than generating a dialog but it would follow the same general process (dialogs are much better than input()).
https://www.mathworks.com/matlabcentral/answers/631719-how-to-form-an-array-with-the-input-values#answer_529649
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Rich006
Rich006 2023-4-20
The whole purpose of the app is to get input from the user (start date, start time, end date, and end time plus three other values), and then call a function with those values as arguments. Maybe I don't even want a full-on App, but just a few input dialogs wrapped in a script with validation. I was thinking I wanted one dialog for all seven inputs, with validation happening within the dialog, but that's probably not the best approach. This should be as simple as possible, but no simpler. :-)
Adam Danz
Adam Danz 2023-4-20
I see. That makes sense. You could create a dialog or an app, inputdlg might come in handy.
Let's say you're using inputdlg. Create it within a while-loop that creates the dialog, validates the users's input, and either leaves the loop or continues for another iteration.
It will look something like this.
inputsGood = false;
while ~inputsGood
response = inputdlg(___);
inputsGood = myValidation();
end

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