fix(ios): guard interactiveContentPopGestureRecognizer for apps built with pre-26 SDKs (#11313)

edusperoni · web-flow · commit aea175f625ed · 2026-07-23T10:55:39.000-07:00
interactiveContentPopGestureRecognizer only exists in the iOS 26 SDK. When
an app is built with an older Xcode/SDK (e.g. Xcode 16 / iOS 18 SDK) but run
on iOS 26+, the property is absent from the generated ObjC metadata (metadata
comes from the build SDK headers), so accessing it returns undefined and the
runtime SDK_VERSION &gt;= 26 check throws:

  TypeError: Cannot set properties of undefined (setting 'enabled')

crashing the app on first page navigation. Guard the property access with an
existence check, matching the pattern already used in
_updateEnableSwipeBackNavigation.
diff --git a/packages/core/ui/page/index.ios.ts b/packages/core/ui/page/index.ios.ts
@@ -189,13 +189,13 @@ class UIViewControllerImpl extends UIViewController {
 							// only consider when interactive transitions are not enabled
 							navigationController.interactivePopGestureRecognizer.delegate = navigationController;
 							navigationController.interactivePopGestureRecognizer.enabled = owner.enableSwipeBackNavigation;
-							if (SDK_VERSION >= 26) {
+							if (SDK_VERSION >= 26 && navigationController.interactiveContentPopGestureRecognizer) {
 								navigationController.interactiveContentPopGestureRecognizer.enabled = owner.enableSwipeBackNavigation;
 							}
 						}
 					} else {
 						navigationController.interactivePopGestureRecognizer.enabled = false;
-						if (SDK_VERSION >= 26) {
+						if (SDK_VERSION >= 26 && navigationController.interactiveContentPopGestureRecognizer) {
 							navigationController.interactiveContentPopGestureRecognizer.enabled = false;
 						}
 					}

Original file line number	Diff line number	Diff line change
`@@ -189,13 +189,13 @@ class UIViewControllerImpl extends UIViewController {`
`189`	`189`	`// only consider when interactive transitions are not enabled`
`190`	`190`	`navigationController.interactivePopGestureRecognizer.delegate = navigationController;`
`191`	`191`	`navigationController.interactivePopGestureRecognizer.enabled = owner.enableSwipeBackNavigation;`
`192`		`- if (SDK_VERSION >= 26) {`
	`192`	`+ if (SDK_VERSION >= 26 && navigationController.interactiveContentPopGestureRecognizer) {`
`193`	`193`	`navigationController.interactiveContentPopGestureRecognizer.enabled = owner.enableSwipeBackNavigation;`
`194`	`194`	`}`
`195`	`195`	`}`
`196`	`196`	`} else {`
`197`	`197`	`navigationController.interactivePopGestureRecognizer.enabled = false;`
`198`		`- if (SDK_VERSION >= 26) {`
	`198`	`+ if (SDK_VERSION >= 26 && navigationController.interactiveContentPopGestureRecognizer) {`
`199`	`199`	`navigationController.interactiveContentPopGestureRecognizer.enabled = false;`
`200`	`200`	`}`
`201`	`201`	`}`