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fix: stale VoiceOver value from async UI updates to Text #58169

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fix: stale VoiceOver value from async UI updates to Text #58169

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11 changes: 11 additions & 0 deletions packages/react-native/React/Fabric/Mounting/ComponentViews/Text/RCTParagraphComponentView.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -138,6 +138,17 @@ - (void)updateState:(const State::Shared &)state oldState:(const State::Shared &
_textView.state = std::static_pointer_cast<const ParagraphShadowNode::ConcreteState>(state);
[_textView setNeedsDisplay];
[self setNeedsLayout];

// If the attributed string has changed, we need to notify the accessibility system that something changed,
// otherwise it may hold on to stale values (this happens most often when an element is updated async)
// https://github.com/react/react-native/issues/58145
if (state && oldState) {
const auto &newData = std::static_pointer_cast<const ParagraphShadowNode::ConcreteState>(state)->getData();
const auto &oldData = std::static_pointer_cast<const ParagraphShadowNode::ConcreteState>(oldState)->getData();
if (!newData.attributedString.isContentEqual(oldData.attributedString)) {
UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification, nil);
}
}
}

- (void)updateLayoutMetrics:(const LayoutMetrics &)layoutMetrics
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