What is matlab.apps.AppBase

In app designer, the first line of code is

classdef app1 < matlab.apps.AppBase

but I cannot find any documentation about this class. Can someone elaborate a bit?

I was trying to create a class from scratch without app designer, and I came across the issue that I cannot assign a callback to a button like this

app.Button.ButtonPushedFcn = @app.buttonCallback

but must do

app.Button.ButtonPushedFcn = createCallbackFcn(app, @buttonCallback, true)

The error that I got is

Error using app1/buttonCallback

Too many input arguments.

I guess the callbacks must be associated using a special way by calling the createCallbackFcn from matlab.apps.AppBase?

[Walter Roberson]

Did you try

app.Button.ButtonPushedFcn = @buttonCallback

[Siaw Chong Lee]

Yes I tried that, it does not work because the buttonCallback function is not recongnizable

Answer 1

[Praveen Reddy]

Hi Siaw,

I understand that you are getting an error while trying to create call back to a button by inheriting “matlab.apps.AppBase”. The “matlab.apps.AppBase” class provides various features and functionality specific to App Designer, such as managing the app's components, handling events, and generating the user interface. It serves as the base class for your custom app class, allowing you to inherit and utilize the built-in functionality provided by App Designer. The error you are facing is due to an incorrect usage of the function, “createCallBackFcn" requires you to pass “app”, “callback”, “eventData” as the three input arguments.

Hope this helps!