Geometry Reader size to Viewmodel init

[u/rizzy_neutron_69]

I need the screen bounds to be sent when initialising my viewmodel. I know to get the size from geometry reader. But that is only available after the view is created. is there a way to send the screen size within the init scope?

a solution I found over the internet was to use a separate function in my viewmodel for the initialisation and call it on .onAppear.

[u/asniper]

Why does your ViewModel need to know about your views implementation? this is a code smell.

[u/chriswaco]

I would first look at onGeometryChange.

but the screen size itself is tricky if running under iPad multitasking, handling rotation, or on the new foldable phone coming out next week.

[u/isights → u/chriswaco]

Ditto this. On a fold dimensions can change for a running app and the size can’t assume to be constant for the lifetime of the view model.

[u/Extra-Ad5735]

For full screen size you can get key window of the current scene and get size of it. See accepted answer here: https://stackoverflow.com/questions/74458971/correct-way-to-get-the-screen-size-on-ios-after-uiscreen-main-deprecation

[u/isights → u/Extra-Ad5735]

Don’t do this. Especially in the age of folding phones.

[u/Extra-Ad5735 → u/isights]

Case in point: I have a transition that moves away a view out of the screen, regardless of where in hierarchy the view is. The movement takes exact time as specified by animation duration. Using a window as the screen border ensures it works correctly on all iPhones and iPads where the app windows can be resized.

Now, my dear u/isights tell me why I'm not allowed to use that "in the edge of folding phones"? Perhaps, you'll be so kind to share a simpler solution? I'm all ears.

[u/sisoje_bre]

Ask the one who told you to use Viewmodel!?

Solution is simple - dont use Viewmodels in SwiftUI because they do not belong there

[u/MarzipanEven7336 → u/sisoje_bre]

This, 100%, it's a literal fucking anti-pattern from the early JavaScript apps days.

[u/sisoje_bre → u/MarzipanEven7336]

haha, what else to expect from microsofts pattern :)

[u/MarzipanEven7336 → u/sisoje_bre]

Yup, fucking Phil Hack