How can I load a saved .mat to restore an app state? (or alternative!)

Question

Jack Callaghan 2019-3-5

0
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https://ww2.mathworks.cn/matlabcentral/answers/448379-how-can-i-load-a-saved-mat-to-restore-an-app-state-or-alternative

评论： Jack Callaghan 2022-5-24

I am writing an app for some data analysis, and for development reasons I want to be able to load a "saved state" whereby the app object restores to the version in a saved .mat file. My understanding is that it is possible to load a .mat and save fields from it (here, and here), however when I try this the uifigure objects do not become populated. Is there a way to restore an app in the way I have described? Or am I doing something fundamentally wrong?

I am using R2018b and App Designer.

Saving the .mat:

function SaveState(app)
    name = inputdlg('Save name:');
    save([cd,filesep,name{1},'.mat'],'app')
end

Loading the .mat is referenced in startupFcn:

function app = LoadState(app)
    name = uigetfile('*.mat');
    opened = load(name);
    openf = fields(opened);
    for i = 1:numel(openf)
        app.(openf{i}) = opened.app.(openf{i});
    end
end        

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Magnus Hök 2022-5-24

...also tried:

K>> save('tst','-struct','app')

Error using save

The argument to -STRUCT must be the name of a scalar structure

variable.

K>>

Jack Callaghan 2022-5-24

Hi Magnus.

No, I didn't solve it.

Instead, I created a 'save' function which wrote information to a custom delimited text file, which I can then open using a 'load' function which populates the app. I could link the 'load' function to the app startup but it is more conveient for me to open the app then choose which state to load.

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