[Bug]: IOS navigation guidance voice instruction not working

[rajeshbdabhi]

Is there an existing issue for this?

• I have searched the existing issues

Description of the bug

for IOS when i start navigation guide turn by turn voice instruction not working means voice instruction audio is not working. but in android it is working fine.

Flutter version

3.29.2

Package version

0.6.2

Native SDK versions

• I haven't changed the version of the native SDKs

Flutter Doctor Output

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.29.2, on macOS 15.5 24F74 darwin-arm64, locale en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[!] Xcode - develop for iOS and macOS (Xcode 16.4)
! CocoaPods 1.15.0 out of date (1.16.2 is recommended).
CocoaPods is a package manager for iOS or macOS platform code.
Without CocoaPods, plugins will not work on iOS or macOS.
For more info, see https://flutter.dev/to/platform-plugins
To update CocoaPods, see https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.3)
[✓] VS Code (version 1.101.2)
[✓] Connected device (6 available)
[✓] Network resources

Steps to reproduce

in IOS just start navigation guidance audio will not work but in android it is working fine

Expected vs Actual Behavior

audio guidance should work for IOS same like android.

Code Sample

await GoogleMapsNavigator.setAudioGuidance(
            NavigationAudioGuidanceSettings(
          guidanceType: NavigationAudioGuidanceType.alertsAndGuidance,
        ));
await GoogleMapsNavigator.startGuidance();

Additional Context

No response

[illuminati1911]

@rajeshbdabhi Thanks for reporting this. We'll look into it.

[illuminati1911]

@rajeshbdabhi Referring to your earlier post where you shared this error message:
((null)) was false: Session Fetcher Synthesis Error: com.google.HTTPStatus ((null)) was false: Falling back to canned message after TTS synthesis failed for message: <GMSx_SpeechMessage: 0x600000f23450>

This seems like a network issue.

1. Are you on unrestricted network?
2. Have you had the voice guidance work before?

You could try running our SDKs example app and see if the voice guidance works there. It's enabled by default when you start the navigation.
https://github.com/googlemaps/flutter-navigation-sdk/tree/main/example

[rajeshbdabhi]

@illuminati1911 i checked SDks example as well in that also same issue present audio is not working for turn by turn navigation.

above issue i can able to fix using flutter_tts this plugin but most critical issue is #357 (comment) this. i can't able give navigation feature updates to my app users because of this issue.

[illuminati1911]

@rajeshbdabhi The example app with the latest version works fine on my end in regards to voice guidance. Based on your error message, I could only guess it's related to network. Could you test this on some other network and see if you still get that same Session fetcher error?

[rajeshbdabhi]

@illuminati1911 yes i checked in real IOS device voice guidance working fine. in simulator it is not working

[illuminati1911]

@illuminati1911 yes i checked in real IOS device voice guidance working fine. in simulator it is not working

I can get it to work on simulator as well. Maybe you can try connecting your laptop/computer to the same network as what your iOS device is using and test it again.