🐛 [firebase_dynamic_links] iOS does not handle dynamic links if app is closed

[b-jan]

Bug report

on iOS only, if my app is closed or not installed yet, the information from the dynamic link is lost on the app opening.

Steps to reproduce

Steps to reproduce the behavior:

1. iOS
2. close my app completely
3. click on the dynamic link
4. cannot retrieve information from the link

Expected behavior

Same as Android, if the app is closed, when I click on a dynamic link, the app opens and i can retrieve the information from the link.

---

Additional context

I found some related issues:

• Github 4534
• PR not merged
• Stackoverflow

I am using:

• firebase_dynamic_links: ^0.7.0+1
• firebase_core: ^0.7.0

  void _initDynamicLinks(context) async {
    FirebaseDynamicLinks.instance.onLink(
        onSuccess: (PendingDynamicLinkData dynamicLink) async {
      final Uri deepLink = dynamicLink?.link;

      if (deepLink != null) {
        final code = deepLink.path.split('/')[1];
        // use code
      }
    }, onError: (OnLinkErrorException error) async {
       // show error
    });

    final PendingDynamicLinkData data =
        await FirebaseDynamicLinks.instance.getInitialLink();
    final Uri deepLink = data?.link;

    if (deepLink != null) {
      final code = deepLink.path.split('/')[1];
      // use code
     }
  }

---

Flutter doctor

Run flutter doctor and paste the output below:

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Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 1.22.5, on Mac OS X 10.15.5 19F101 darwin-x64,
    locale fr-FR)

[✓] Android toolchain - develop for Android devices (Android SDK version
    30.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 11.6)
[✓] Android Studio (version 4.0)
[✓] VS Code (version 1.52.1)
[✓] Connected device (1 available)

• No issues found!

---

Flutter dependencies

Run flutter pub deps -- --style=compact and paste the output below:

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Dart SDK 2.10.4
Flutter SDK 1.22.5
my_app 2.2.5+19

dependencies:
- apple_sign_in 0.1.0 [flutter]
- audioplayers 0.17.3 [uuid path_provider flutter flutter_web_plugins]
- bloc 6.1.0 [meta]
- carousel_slider 2.3.1 [flutter]
- equatable 1.2.5 [collection meta]
- firebase_analytics 7.0.1 [meta flutter firebase_core firebase_analytics_web firebase_analytics_platform_interface]
- firebase_auth 0.20.0+1 [meta firebase_core firebase_core_platform_interface firebase_auth_platform_interface firebase_auth_web flutter]
- firebase_core 0.7.0 [firebase_core_platform_interface flutter quiver meta firebase_core_web]
- firebase_dynamic_links 0.7.0+1 [flutter firebase_core]
- firebase_messaging 8.0.0-dev.14 [meta flutter firebase_core firebase_core_platform_interface firebase_messaging_platform_interface firebase_messaging_web]
- firebase_remote_config 0.6.0 [flutter firebase_core]
- flutter 0.0.0 [characters collection meta typed_data vector_math sky_engine]
- flutter_bloc 6.1.0 [flutter bloc provider]
- flutter_compass 0.5.1 [flutter rxdart]
- flutter_facebook_login 3.0.0 [flutter collection]
- flutter_local_notifications 3.0.3 [flutter platform flutter_local_notifications_platform_interface timezone]
- geolocator 6.1.13 [flutter geolocator_platform_interface]
- global_configuration 1.6.0 [flutter http]
- google_sign_in 4.5.5 [google_sign_in_platform_interface flutter meta google_sign_in_web]
- graphql 3.1.0 [meta http mime path crypto http_parser uuid_enhanced gql rxdart websocket quiver]
- http 0.12.2 [http_parser path pedantic]
- image_picker 0.6.7+12 [flutter flutter_plugin_android_lifecycle image_picker_platform_interface]
- meta 1.3.0-nullsafety.3
- package_info 0.4.3 [flutter]
- pull_to_refresh 1.6.3 [flutter]
- sensors 0.4.2+6 [flutter]
- sentry 3.0.1 [http meta stack_trace usage pedantic]
- smooth_star_rating 1.1.1 [flutter]
- transparent_image 1.0.0
- url_launcher 5.7.8 [flutter url_launcher_platform_interface url_launcher_web url_launcher_linux url_launcher_macos url_launcher_windows]
- vibration 1.7.3 [flutter vibration_web]

dev dependencies:
- flutter_launcher_icons 0.7.5 [image args yaml]
- flutter_localizations 0.0.0 [flutter intl characters collection meta path typed_data vector_math]

transitive dependencies:
- archive 2.0.13 [crypto args path]
- args 1.6.0
- characters 1.1.0-nullsafety.3
- charcode 1.1.3
- collection 1.15.0-nullsafety.3
- convert 2.1.1 [charcode typed_data]
- crypto 2.1.4 [collection convert typed_data]
- ffi 0.1.3
- file 5.2.1 [intl meta path]
- firebase 7.3.0 [http http_parser js]
- firebase_analytics_platform_interface 1.0.1 [flutter meta]
- firebase_analytics_web 0.1.1 [flutter flutter_web_plugins firebase firebase_analytics_platform_interface meta]
- firebase_auth_platform_interface 3.0.1 [flutter meta firebase_core plugin_platform_interface]
- firebase_auth_web 0.3.2+6 [flutter flutter_web_plugins meta http_parser intl firebase_core firebase_core_web firebase_auth_platform_interface js]
- firebase_core_platform_interface 3.0.1 [flutter meta plugin_platform_interface quiver]
- firebase_core_web 0.2.1+3 [firebase_core_platform_interface flutter flutter_web_plugins meta js]
- firebase_messaging_platform_interface 1.0.0-dev.10 [flutter meta firebase_core plugin_platform_interface]
- firebase_messaging_web 0.1.0-dev.5 [flutter flutter_web_plugins meta firebase_core firebase_core_web firebase_messaging_platform_interface js service_worker]
- flutter_local_notifications_platform_interface 2.0.0+1 [flutter plugin_platform_interface]
- flutter_plugin_android_lifecycle 1.0.11 [flutter]
- flutter_web_plugins 0.0.0 [flutter characters collection meta typed_data vector_math]
- geolocator_platform_interface 1.0.8 [flutter meta plugin_platform_interface vector_math]
- google_sign_in_platform_interface 1.1.2 [flutter meta quiver]
- google_sign_in_web 0.9.1+1 [google_sign_in_platform_interface flutter flutter_web_plugins meta js]
- gql 0.12.3 [source_span meta collection]
- http_parser 3.1.4 [charcode collection source_span string_scanner typed_data]
- image 2.1.12 [archive xml]
- image_picker_platform_interface 1.1.1 [flutter meta http plugin_platform_interface]
- intl 0.16.1 [path]
- js 0.6.2
- matcher 0.12.6 [stack_trace]
- mime 0.9.6+3
- nested 0.0.4 [flutter]
- path 1.8.0-nullsafety.1
- path_provider 1.6.27 [flutter path_provider_platform_interface path_provider_macos path_provider_linux path_provider_windows]
- path_provider_linux 0.0.1+2 [path xdg_directories path_provider_platform_interface flutter]
- path_provider_macos 0.0.4+8 [flutter]
- path_provider_platform_interface 1.0.4 [flutter meta platform plugin_platform_interface]
- path_provider_windows 0.0.4+3 [path_provider_platform_interface meta path flutter ffi win32]
- pedantic 1.9.0
- petitparser 2.4.0 [meta]
- platform 2.2.1
- plugin_platform_interface 1.0.2 [meta]
- process 3.0.13 [file intl meta path platform]
- provider 4.3.2+2 [flutter nested collection]
- quiver 2.1.3 [matcher meta]
- rxdart 0.24.1
- service_worker 0.2.4 [js]
- sky_engine 0.0.99
- source_span 1.7.0 [charcode collection meta path term_glyph]
- stack_trace 1.9.3 [path]
- string_scanner 1.0.5 [charcode meta source_span]
- term_glyph 1.1.0
- timezone 0.5.9 [path]
- typed_data 1.3.0-nullsafety.3 [collection]
- url_launcher_linux 0.0.1+3 [flutter]
- url_launcher_macos 0.0.1+8 [flutter]
- url_launcher_platform_interface 1.0.9 [flutter meta plugin_platform_interface]
- url_launcher_web 0.1.5 [url_launcher_platform_interface flutter flutter_web_plugins meta]
- url_launcher_windows 0.0.1+1 [flutter]
- usage 3.4.2 [path]
- uuid 2.2.2 [crypto convert]
- uuid_enhanced 3.0.2 [crypto convert collection]
- vector_math 2.1.0-nullsafety.3
- vibration_web 1.6.2 [flutter flutter_web_plugins]
- websocket 0.0.5
- win32 1.7.4 [ffi]
- xdg_directories 0.1.2 [meta path process]
- xml 3.6.1 [collection convert meta petitparser]
- yaml 2.2.1 [charcode collection string_scanner source_span]

---

[markusaksli-nc]

Hi @b-jan
Where are you clicking on the link? If you long press and use the Open in app option is the behavior the same?
I'm assuming that the links work when the app is backgrounded?
Thank you

[b-jan]

Thank you for your answer @markusaksli-nc

I am clicking on the link from the web / or in whatsapp / messenger after sharing it.
You're right, the link works when the app is in background.

I just added 2 seconds of delay before handling the initial dynamic link and now I can say it fails less often... Weird.

[markusaksli-nc]

Could you provide a minimal complete reproducible code sample?

I'm not seeing this with the official example.

[b-jan]

Thanks for your help.
I'll make the code sample next week.

[markusaksli-nc]

Adding back the wait label