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Disable zoom navigation transitions when running on a Mac

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Dismissing any SwiftUI sheet while a .navigationTransition(.zoom) is
registered traps inside UIKit's _UIZoomTransitionController on the Mac
presentation path (macOS 26.4.1, builds 259/261 crash reports). The
same code path is stable on iOS and iPadOS, so this is an Apple
framework bug on Mac that can only be avoided.

Gate both zoom-transition modifiers on a cached runtime check for
isMacCatalystApp / isiOSAppOnMac so the Mac build falls into the
existing no-op branch while iOS and iPadOS keep the zoom animation.
This commit is contained in:
Arkadiusz Fal
2026-07-23 23:09:47 +02:00
parent ce7e9cbde7
commit 41d58f47a3
1 changed files with 10 additions and 2 deletions
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12
Yattee/Extensions/View+ZoomTransition.swift
View File

@@ -9,6 +9,14 @@
import SwiftUI import SwiftUI
#if os(iOS)
/// Whether the iOS binary is running on a Mac (Catalyst or "Designed for iPad").
/// Zoom transitions trap inside UIKit's _UIZoomTransitionController when a sheet
/// is dismissed on the Mac presentation path, so they must stay off there.
private let zoomTransitionsRunningOnMac: Bool =
ProcessInfo.processInfo.isMacCatalystApp || ProcessInfo.processInfo.isiOSAppOnMac
#endif
// MARK: - Environment Keys // MARK: - Environment Keys
/// Environment key to pass the navigation transition namespace through the view hierarchy. /// Environment key to pass the navigation transition namespace through the view hierarchy.
@@ -49,7 +57,7 @@ struct ZoomTransitionSourceModifier<ID: Hashable>: ViewModifier {
func body(content: Content) -> some View { func body(content: Content) -> some View {
#if os(iOS) #if os(iOS)
if zoomTransitionsEnabled, let namespace { if zoomTransitionsEnabled, !zoomTransitionsRunningOnMac, let namespace {
content content
.matchedTransitionSource(id: id, in: namespace) .matchedTransitionSource(id: id, in: namespace)
} else { } else {
@@ -75,7 +83,7 @@ struct ZoomTransitionDestinationModifier<ID: Hashable>: ViewModifier {
func body(content: Content) -> some View { func body(content: Content) -> some View {
#if os(iOS) #if os(iOS)
if zoomTransitionsEnabled, let namespace { if zoomTransitionsEnabled, !zoomTransitionsRunningOnMac, let namespace {
content content
.navigationTransition(.zoom(sourceID: id, in: namespace)) .navigationTransition(.zoom(sourceID: id, in: namespace))
} else { } else {