How to invoke a matlab.apps.AppBase based class without App Designer?

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Kenneth 2024-2-2

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评论： Kenneth 2024-2-6

My App Designer app takes impossibly long to save (20 to 30 seconds) every time I want to do a test run. So I'm trying a different strategy: once and for all, copy all the code out of the app designer code view and make a .m file of it. Then run that. Unfortunately, this simply defines the class and then exits. It does not create a window or run the class within that window.

Can this work? Is there some way I can make a stub of a main program that invokes my app class in this fashion?

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Answer 1

Alberto Cuadra Lara 2024-2-2

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Hi Kenneth,

I think that should work. Have you saved the *.m file with the same name as the *.mlapp? Otherwise you should rename classdef accordingly, as well as the name of the construct app function, namely

classdef newAppName < matlab.apps.AppBase
    % Your app
    % App creation and deletion
    methods (Access = public)
        % Construct app
        function app = newAppName
        end
        % Delete app
    end
end

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Alberto Cuadra Lara 2024-2-3

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Let's consider your mlapp file was oldAppName.mlapp, in that case the class name will be oldAppName, namely

classdef oldAppName < matlab.apps.AppBase

and the constructor line will have the same oldAppName reference.

If you copy-paste your code from AppDesigner to a newAppName.m file, you have to modify the class name and the constructor accordingly, as I indicated in the previous comment.

I hope this help.

Best,

Alberto

Kenneth 2024-2-6

You are still missing my question. Where is the first line of code that gets run when I run this app? Is it the app constructor? I can see where the .mlapp file DEFINES the app class, but what INSTANTIATES it?

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