Pass Variable to Calling App

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Chris Nemecek 2020-4-27

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https://ww2.mathworks.cn/matlabcentral/answers/521227-pass-variable-to-calling-app

评论： Chris Nemecek 2020-4-30

I have searched around for the best practice to pass an app variable back to the calling app. For example, app1 is the main app and calls app2. I can easily pass variables into app2 via h = app2(a, b) when I run it from app1. However, I would like to pass back a and b to the calling app when app2 is closed. I have been using setappdata and getappdata, but don't believe this is technically the right approach.

app1 pseudocode:

function ButtonPress(app)

a = 5;

b = 10;

h = app2(a,b); % app2 modifies a and b

uiwait(h.UIFigure)

% at this point when app2 is closed, i want a and b returned to app1

end

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Answer 1

Mohammad Sami 2020-4-28

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https://ww2.mathworks.cn/matlabcentral/answers/521227-pass-variable-to-calling-app#answer_428786

Please refer to the following documentation on how to pass data between appdesigner apps.

https://www.mathworks.com/help/matlab/creating_guis/creating-multiwindow-apps-in-app-designer.html

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Mohammad Sami 2020-4-30

The second approach will work as well.

In my opinion using a function to update the properties may be preferable in certain cases.

Example if you want the change to be reflected in the UI in any way. The function can execute additional code to update the UI in addition to setting the properties.

A function can also do validation checks e.t.c.

Chris Nemecek 2020-4-30