fix(ios): prevent gc from collecting current navigation transition (#10967)

CatchABus · web-flow · commit 120e635cfa5b · 2025-11-27T12:33:21.000-06:00
diff --git a/packages/core/ui/frame/index.ios.ts b/packages/core/ui/frame/index.ios.ts
@@ -14,6 +14,7 @@ import { Trace } from '../../trace';
 import { SlideTransition } from '../transition/slide-transition';
 import { FadeTransition } from '../transition/fade-transition';
 import { SharedTransition } from '../transition/shared-transition';
+import type { Transition } from '../transition';
 
 export * from './frame-common';
 
@@ -73,7 +74,11 @@ export class Frame extends FrameBase {
 		}
 
 		this._removeFromFrameStack();
-		this.viewController = null;
+
+		if (this.viewController) {
+			this.viewController.lastExecutingTransition = null;
+			this.viewController = null;
+		}
 
 		// This was the last frame so we can get rid of the controller delegate reference
 		if (this._isFrameStackEmpty()) {
@@ -475,6 +480,9 @@ class UINavigationControllerDelegateImpl extends NSObject implements UINavigatio
 			}
 		}
 
+		// Keep a strong reference of the last executing transition to prevent gc from collecting it
+		navigationController.lastExecutingTransition = transition;
+
 		if (transition?.iosNavigatedController) {
 			return transition.iosNavigatedController(navigationController, operation, fromVC, toVC);
 		}
@@ -509,6 +517,7 @@ class UINavigationControllerDelegateImpl extends NSObject implements UINavigatio
 @NativeClass
 class UINavigationControllerImpl extends UINavigationController {
 	private _owner: WeakRef<Frame>;
+	public lastExecutingTransition: Transition;
 
 	public static initWithOwner(owner: WeakRef<Frame>): UINavigationControllerImpl {
 		const navigationBarClass = owner.deref()?.iosNavigationBarClass ?? null;
