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Erroneous buttons created in AppDesigner

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Jeremiah Sullivan 2021-9-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1458629-erroneous-buttons-created-in-appdesigner

编辑： Adam Danz 2024-6-28

I have an App created in AppDesigner that keeps creating five copies of the same button whenever I open the app. After deleting and/or resaving the entries in AppDesigner, the same buttons are recreated when I open the app again.

I have edited this app on both Windows and Mac, in 2017B, 2020B and 2021A. I am seeing this issue currently on Windows 2021A, but believe I also saw it on Mac 2021A. I would ideally like to keep functionality across all versions and operating systems, but understand if this is causing the issue.

I cannot easily create a minimal example, but will try if it would be helpful.

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Jeremiah Sullivan 2021-9-22

编辑：Jeremiah Sullivan 2021-9-22

Let me know if I miss anything

Button is named "RefreshButton_2". I can rename and delete all occurances of the button and the auto-generated code updates appropriately (no reference to RefreshButton_2 remains).
Callbacks: No, if I delete all of the buttons there are no matches for "RefreshButton_2" anywhere in the code (callback or otherwise); at least the code exposed in "Code View"
Launching vs. Runtime: I hypothesize they are created when I open the app (`>> appDesigner(filename)`)
If I just open and close the app, it prompts me to save (file was modified), leading me to believe the app was properly saved
I can run the app just fine after I delete the buttons, so I don't think anything bad is happening at runtime
There are no calls to uibutton outside of the automatically generated (uneditable) code. There are no calls to uicontrol

It seems like the number of buttons each iteration created has increased the more I play with it. Here is what the auto-generated properties look like now (I renamed one of the original buttons to RefreshButtonAgain, which is not duplicating itself).

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButton_2 matlab.ui.control.Button

RefreshButtonAgain matlab.ui.control.Button

Here is the auto-generated creation code. The callback-behavior is a bit strange (not every button has a callback)

Edit: it shares the "RefreshButtonPushed" callback with another button, not sure why that would be an issue though

% Create RefreshButtonAgain

app.RefreshButtonAgain = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButtonAgain.Position = [12 11 57 28];

app.RefreshButtonAgain.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.ButtonPushedFcn = createCallbackFcn(app, @RefreshButtonPushed, true);

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

% Create RefreshButton_2

app.RefreshButton_2 = uibutton(app.DataFiltersPanel, 'push');

app.RefreshButton_2.Position = [12 11 57 28];

app.RefreshButton_2.Text = 'Refresh';

Adam Danz 2021-9-29

编辑：Adam Danz 2024-6-28

Contact tech support. In a previous question, tech support provided a function to the user that solved the problem.

Kostas Pitrhs 2024-6-27

I have the exact problem now in 2024a!

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回答（1 个）

Reshma Nerella 2022-2-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1458629-erroneous-buttons-created-in-appdesigner#answer_887170

Hi,

This bug was fixed in R2018b Update 3.

This issue might still be seen in future releases of MATLAB while editing the apps that were are created in any version before R2018b Update 3.

In your case, instead of editing the app in R2020b or R2021a, create a new one to prevent the issue.

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Kostas Pitrhs 2024-6-27

How was this bug fixed if it appears in 2021!!!

And by the way, I now have the xact same issue in 2024 a!!!!

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