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app designer private and public properties?

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In app designer, if i am going to exectute come functions within the app, can I just use private properties? or do I need to use public ones to be shared outside of the app, i.e. within these functions?

Accepted Answer

TADA on 2 Jan 2020
If these functions are methods of your app, you can use private properties from within these methods, but if they are functions outside this app, that is in other .m files (different class, or static functions, makes no difference) you'd have to use public properties
Isabelle Lorei
Isabelle Lorei on 7 Jun 2022
My unterstanding:
The reason to define Properties is to create a variable to share and store data between callbacks and functions.
If I just need the data to be shared between callbacks and functions inside one app, I can use private properties.
But if I need the data to be shared between several apps, I need public properties.

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