continueUserActivity not being called when Universal Link is launched, using AppsFlyer and React Native

Question

I'm working on adding Universal/Deep Linking to a React Native app, and it's also using the AppsFlyer React Native plugin / iOS SDK (however I believe this is not the issue). Whenever I click a universal link (an AppsFlyer OneLink), it launches the app but the application:continueUserActivity:restorationHandler method simply isn't called. When I launch via the configured URL scheme, it works fine. I have added a willContinueUserActivityWithType method and this runs when the app is launched with the NSUserActivity type of NSUserActivityTypeBrowsingWeb but after that it just launches the app as normal. This is the code in the AppDelegate.m:

#import <RNAppsFlyer.h>

@implementation AppDelegate

// ...

- (BOOL)application:(UIApplication *)application willContinueUserActivityWithType:(nonnull NSString *)userActivityType {
  if ([userActivityType isEqualToString:NSUserActivityTypeBrowsingWeb]) {
    return YES; // using the xcode debbugger I can see it gets to here
  }
  return NO;
}

// handle Universal Links
- (BOOL)application:(UIApplication *)application continueUserActivity:(nonnull NSUserActivity *)userActivity
 restorationHandler:(nonnull void (^)(NSArray<id<UIUserActivityRestoring>> * _Nullable))restorationHandler {
  [[AppsFlyerAttribution shared] continueUserActivity:userActivity restorationHandler:restorationHandler]; // I don't think this is an issue. But I can provide more details about AppsFlyer if you need it
  return YES;
}

// other library/framework initialistion

@end

There is an issue on the Appsflyer github here, but none of the suggestions there have worked, plus apparently it's been fixed on the lastest framework version, which I am using (6.2.41). There is also an issue on the React Native github here, but I have tried the suggestions (disabling remote JS debugging, release builds, etc) and nothing works; in fact in Release mode, willContinueUserActivityWithTypedoesn't get called at all. I continue to experiment here though.

Answer 1

Not sure if this will help you as well, but my problem was that Firebase was overriding the continueUserActivity call with its own inside the GLUAppDelegateSwizzler.m. The way I fixed it was by adding this to the info.plist file:

<key>FirebaseAppDelegateProxyEnabled</key>
<false/>