How to use public properties in matlab app designer?

Question

Muazma Ali 2023-6-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1978644-how-to-use-public-properties-in-matlab-app-designer

评论： Kevin Holly 2023-6-7

Hi

I have two apps , the one in invoking the other. app2 is invoking the app 3. The app 3 consists of a listbox which is supposed to show up as many times as the number of zones (chosen by the user in app 2)

I thought I was supposed to define antall_soner as public property in both app2 and in app 3 as both of them are using this variable but the value of it is set in app2.

I dont know why but I an getting a warning when I am in the code view though I have set app. antall_soner everywhere.

Can anybody help me with my problem?

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Answer 1

Kevin Holly 2023-6-6

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https://ww2.mathworks.cn/matlabcentral/answers/1978644-how-to-use-public-properties-in-matlab-app-designer#answer_1251554

I have modified your apps and attached them here.

In app3, I added a Callingapp property. In code view, I clicked "App Input Argument" and added "app2" as an input variable. Within the startup function, I added, "app.Callingapp = app2".

For app2, I modified how you called app3. Instead of just app3, it is now app3(app) - this includes all the property variables in app2 as an input to app3.

Please also see the link here on creating multiwindow apps in App Designer:

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

Let me know if you have any more questions.

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Muazma Ali 2023-6-7

@Kevin Holly By the way could you just have written app.app2 in the startup function and just app2 as the public property . If I understood it correctly you just chose to have new variable and set it equal to app2 so it could be easier to understand the code..?

Kevin Holly 2023-6-7

在 MATLAB Online 中打开

In app2, app3 was called with the input "app" as such:

app3(app)

"app" here includes access to all of the property variables in app2.

In app3, I added a Callingapp property. In code view, I clicked "App Input Argument" and added "app2" as an input variable. Within the startup function

app.Callingapp = app2

You could have named the input variable "mainapp" and written the startup function as:

app.Callingapp = mainapp

Now if you want to access any of the property variables from app2 in app3, you can type:

app.Callingapp.VariableName

where "VariableName" is one of the property variables in app2.

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