Skip to content

fix(messaging, iOS): scope iOS 18 duplicate notification workaround to iOS 18.0 only #17932

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
SelaseKay merged 2 commits into from
Jan 8, 2026
+22 −4
Merged

fix(messaging, iOS): scope iOS 18 duplicate notification workaround to iOS 18.0 only #17932

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
e514d90
fix(messaging, iOS): scope iOS 18 duplicate notification workaround t…
SelaseKay Jan 2, 2026
4d230ea
fix(messaging, ios): use message id for iOS 18 duplicate filter
SelaseKay Jan 5, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
26 changes: 22 additions & 4 deletions ..._messaging/ios/firebase_messaging/Sources/firebase_messaging/FLTFirebaseMessagingPlugin.m
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -353,10 +353,20 @@ - (void)userNotificationCenter:(UNUserNotificationCenter *)center
// See this Apple issue: https://forums.developer.apple.com/forums/thread/761597
// when it has been resolved, "_foregroundUniqueIdentifier" can be removed (i.e. the commit for
// this fix)
NSString *notificationIdentifier = notification.request.identifier;
NSDictionary *userInfo = notification.request.content.userInfo;
NSString *messageID = userInfo[@"gcm.message_id"];

if (notification.request.content.userInfo[@"gcm.message_id"] &&
![notificationIdentifier isEqualToString:_foregroundUniqueIdentifier]) {
BOOL shouldCheckForDuplicate = NO;
#if !TARGET_OS_OSX
if (@available(iOS 18.0, *)) {
if (!@available(iOS 18.1, *)) {
// Only iOS 18.0 specifically
shouldCheckForDuplicate = [messageID isEqualToString:_foregroundUniqueIdentifier];
}
}
#endif

if (messageID && !shouldCheckForDuplicate) {
NSDictionary *notificationDict =
[FLTFirebaseMessagingPlugin NSDictionaryFromUNNotification:notification];
[_channel invokeMethod:@"Messaging#onMessage" arguments:notificationDict];
Expand Down Expand Up @@ -385,7 +395,15 @@ - (void)userNotificationCenter:(UNUserNotificationCenter *)center
}
completionHandler(presentationOptions);
}
_foregroundUniqueIdentifier = notificationIdentifier;

// Store notification identifier for iOS 18.0 duplicate detection
#if !TARGET_OS_OSX
if (@available(iOS 18.0, *)) {
if (!@available(iOS 18.1, *)) {
_foregroundUniqueIdentifier = messageID;
}
}
#endif
}

// Called when a user interacts with a notification.
Expand Down
Loading