App Designer - How do I pass a structure or array from one app to another?

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RGB85 2022-2-14

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https://ww2.mathworks.cn/matlabcentral/answers/1649685-app-designer-how-do-i-pass-a-structure-or-array-from-one-app-to-another

编辑： Kevin Holly 2022-2-15

I'm developing an app to process laboratory test data that will use several auxilary apps for different stages of the processing. I initially load the data file into the main app, apply some corrections/calibrations, and store it in a public structure within the main app. I want to pass that structure to a secondary app for more analysis.

I've seen many examples of passing a single value from one app to another, e.g., values from an edit field. I've used that coding approach in other places in my app and it works fine. I'm not able to find any examples of passing arrays or structures between apps. When I try to use the same approach to pass a structure, I'm getting error messages like:

Unrecognized method, property, or field 'structure' for class 'main'.

Does passing a structure work the same way or am I missing something?

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Kevin Holly 2022-2-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1649685-app-designer-how-do-i-pass-a-structure-or-array-from-one-app-to-another#answer_895935

The link below demostrates how to communicate between apps when using app designer.

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

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RGB85 2022-2-15

在 MATLAB Online 中打开

I believe the data is first defined in the main app. I probably haven't provided enough information in my previous posts. I've pasted all of the pertinent code from both the main app (CRSMain) and the auxillary app (CalcCc) below.

Code in CRSMain (I want to send the data structure app.data from here to CalcCc).

    properties (Access = private)
        CalcCc %Calculate Cc auxillary app
    end
    
    properties (Access = public)
        data = struct(); % public data structure defined in CRSMain to store imported data
    end

The CalcCc auxillary app is opened from the menu selection shown below, and app.data is what I want to send to CalcCc.

    function CaculateCcMenuSelected(app, event)
        app.CalcCc=CalcCc(app,app.data);
    end

Code in the CalcCc auxillary app (I want to receive app.data from CRSMain)

    properties (Access = private)
        callingapp% Description
    end
        
    properties (Access = public)
        data = struct();
    end      

Startup function in CalcCc

    function startupFcn(app, CRSMain, datafromCRSMain)
        app.callingapp = CRSMain;
        app.data = datafromCRSMain; 
    end

When I activate CaculateCcMenuSelected in CRSMain, I get the following error.

Error using CalcCc/startupFcn (line 28)

Unrecognized property 'data' for class 'CalcCc'.

Error in CalcCc (line 90)

runStartupFcn(app, @(app)startupFcn(app, varargin{:}))

Error in CRSMain/CaculateCcMenuSelected (line 362)

app.CalcCc=CalcCc(app,app.data);

Error using matlab.ui.internal.controller.WebMenuController/fireActionEvent (line 67)

Error while evaluating Menu Callback.

Kevin Holly 2022-2-15

编辑：Kevin Holly 2022-2-15

在 MATLAB Online 中打开

I meant to remove the app.data. sorry about that.

function CaculateCcMenuSelected(app, event) 
    app.CalcCc=CalcCc(app); 
end

RGB85 2022-2-15

That worked! Thanks Kevin - I appreciate your help!

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