Geometry Reader/Size of Child Views

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Hi -

Hoping someone can point me to a resource/book chapter that will help me solve an issue I am unable to figure out.

I have an HStack of 30 views embedded in a Scroll View. I’d like to show 3 at a time.

I have tried to use geometry reader to calculate the size of the HStack (divided by 3 etc) and then pass that width along to the parent so that it is just big enough to show 3/30 views at a time.

I am wrapping the child view in the Geometry Reader, but I cannot figure out how to pass that “up” to the parent.

I can hard code the width but that solution is not satisfying.

Thoughts? Is Geometry Reader the right tool for this kind of thing?

Thanks

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Sorry to refer to an external site but seem this article is addressing your issue A guide to the SwiftUI layout system - Part 2 | Swift by Sundell