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Wednesday, January 15, 2025

ios – Modal Dismissal Throughout View Transitions in SwiftUI


I’m encountering a problem in SwiftUI the place modals are robotically dismissed throughout view transitions inside a ZStack. Particularly, I’m toggling between two views utilizing an if situation managed by a state variable. One of many views features a button that presents a modal with .sheet. Nonetheless, when the state modifications and the app switches to the opposite view, the modal is dismissed, although the consumer hasn’t interacted with it.
In my bigger app, the scenario is extra complicated. The app was initially constructed with a predominant in UIKit. I’m now engaged on transitioning it to SwiftUI. With UIWindow transitions in UIKit, I didn’t encounter this concern earlier than, because the modal would keep open whatever the view hierarchy modifications.
The modal shouldn’t be introduced straight by the view within the ZStack, however by a deeper baby view. Due to this, I don’t have a option to straight management or protect the modal’s state throughout these transitions. This creates a problem when the modal is anticipated to remain open throughout view modifications.
It looks like SwiftUI treats switching between the if circumstances in a ZStack as utterly eradicating and recreating the view hierarchy, which causes the modal to shut. Is there a beneficial strategy to forestall modals from being dismissed throughout such transitions?

I’ve tried just a few approaches to resolve this:

  • I used an overlay for my second view to keep away from eradicating the primary one with the modal. Nonetheless, the overlay stays beneath the modal, which is not the supposed conduct.
  • I additionally tried utilizing the .fullScreenCover modifier for my second view, however SwiftUI solely permits one .sheet to be open at a time, so this strategy doesn’t work in my case.
  • I attempted setting a zIndex to regulate the layering of views, however this didn’t resolve the problem both.

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