add nullptr check to avoid crash in RCTScrollViewComponentView (#42156)

Summary: Pull Request resolved: #42156 changelog: [internal] Add a missing nullptr check to prevent crash if called after component was reused Reviewed By: fkgozali Differential Revision: D52572807 fbshipit-source-id: 1b5b26996e562abbcb986865299e02df20b58043
facebook · Jan 5, 2024 · cabae39 · cabae39
1 parent 016bb24
commit cabae39
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/...eact-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm b/...eact-native/React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm
@@ -471,6 +471,10 @@ - (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
 
 - (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView
 {
+  if (!_eventEmitter) {
+    return;
+  }
+
   _isUserTriggeredScrolling = NO;
   static_cast<const ScrollViewEventEmitter &>(*_eventEmitter).onScrollToTop([self _scrollViewMetrics]);
   [self _updateStateWithContentOffset];