[🔥 iOS Build] I can't build on react-native new arch Swift project

[ertucaglar]

I want to use AppsFlyer for the first time in my react-native project, but when I add the native configs required for DeepLinking to my project, my project does not build.

Caution

Type of expression is ambiguous without a type annotation

Report

Plugin Version

"react-native-appsflyer": "^6.16.2"

On what Platform are you having the issue?

iOS

What did you do?

yarn add react-native-appsflyer
pod install
Apply DeepLink configs -> https://dev.appsflyer.com/hc/docs/rn_deeplinkintegrate#ios-deeplink-setup

What did you expect to happen?

Build iOS Project

What happened instead?

I can't build iOS project and throw exception

Caution

Type of expression is ambiguous without a type annotation

Please provide any other relevant information.

System:
  OS: macOS 15.5
  CPU: (14) arm64 Apple M3 Max
  Memory: 437.59 MB / 36.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 23.11.0
    path: /opt/homebrew/bin/node
  Yarn:
    version: 4.9.1
    path: /usr/local/bin/yarn
  npm:
    version: 10.9.2
    path: /opt/homebrew/bin/npm
  Watchman:
    version: 2025.04.14.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/lib/ruby/gems/3.4.0/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.4
      - iOS 18.4
      - macOS 15.4
      - tvOS 18.4
      - visionOS 2.4
      - watchOS 11.4
  Android SDK:
    API Levels:
      - "35"
    Build Tools:
      - 35.0.0
    Android NDK: Not Found
IDEs:
  Android Studio: 2024.3 AI-243.25659.59.2432.13423653
  Xcode:
    version: 16.3/16E140
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.15
    path: /usr/bin/javac
  Ruby:
    version: 3.4.3
    path: /opt/homebrew/opt/ruby/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 18.0.0
    wanted: 18.0.0
  react:
    installed: 19.0.0
    wanted: 19.0.0
  react-native:
    installed: 0.79.2
    wanted: 0.79.2
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

[ertucaglar]

If you apply the patch below it works without any build issues

diff --git a/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.h b/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.h
index 48212bf..087b3be 100644
--- a/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.h
+++ b/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.h
@@ -12,7 +12,7 @@
 @property BOOL RNAFBridgeReady;
 
 + (instancetype _Nonnull )shared;
-- (void) continueUserActivity:(NSUserActivity *_Nonnull)userActivity restorationHandler:(void (^_Nullable)(NSArray *_Nullable))restorationHandler;
+- (void) continueUserActivity:(NSUserActivity *_Nonnull)userActivity restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> *_Nullable))restorationHandler;
 - (void) handleOpenUrl:(NSURL *_Nonnull)url options:(NSDictionary *_Nullable)options;
 - (void) handleOpenUrl:(NSURL *_Nonnull)url sourceApplication:(NSString *_Nullable)sourceApplication annotation:(id _Nullable)annotation;
 
diff --git a/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.m b/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.m
index 07a46ee..417d43b 100644
--- a/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.m
+++ b/node_modules/react-native-appsflyer/ios/AppsFlyerAttribution.m
@@ -46,7 +46,8 @@ - (id)init {
 
 #pragma mark - AppDelegate methods
 
-- (void)continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(void (^_Nullable)(NSArray * _Nullable))restorationHandler{
+- (void)continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> *_Nullable))restorationHandler{
+    
     if([self RNAFBridgeReady] == YES){
         [[AppsFlyerLib shared] continueUserActivity:userActivity restorationHandler:restorationHandler];
     }else{

[github-actions]

This issue is stale because it has been open for 60 days with no activity.

[alexferrermano]

Same issue here when trying to use AppsFlyer with new architecture enabled and RN 0.79.4

[AsurNikul]

Same issue in newer version

[NikulVnnovate57]

Same issue in new architecture

"react-native": "0.81.4",
"react-native-appsflyer": "v6.15.3",

[uguraktas]

Is there any update about it ?

[shawnthye-guru]

Is there any update about it?

No @uguraktas, you need to pay for the updates.

[HarshitMadhav]

facing same issue any resolution to it or workaround?

[arapocket]

Same issue and i don't think 6.17.8 fixed it