Error while building the (iOS Swift) project

[pdefuns]

Launching lib/main.dart on Device in debug mode...
Automatically signing iOS for device deployment using specified development team in Xcode project: QP4YDP277L
Xcode build done.                                            5.5s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **
Xcode's output:
↳
    === BUILD TARGET firebase_messaging OF PROJECT Pods WITH CONFIGURATION Debug ===
    /Users/x/Development/Tools/flutter/.pub-cache/hosted/pub.dartlang.org/app_settings-1.0.6/ios/Classes/AppSettingsPlugin.m:2:9: fatal error: 'app_settings/app_settings-Swift.h' file not found
    #import <app_settings/app_settings-Swift.h>
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1 error generated.
Could not build the precompiled application for the device.
Error launching application on Device.
Exited (sigterm)

[spencerccf]

Is your flutter project using Objective-C for the native iOS code? This plugin currently only supports Swift.

[pdefuns]

We're using Objective-C. Can you maybe write that in the plugin description as well?
Are you planning to support Objective-C as well?

[pdefuns]

Sorry. Update: this project I tried to use it is Swift..
So I wonder why it cannot build it for iOS

[plinkos]

We are currently using this plugin in a production app using Swift 4. What version of Swift are you using?

_{Sent with GitHawk}

[pdefuns]

With the newest version, you should use Swift 4.2
I also get a lot of errors if I switch to 4.2 (newest version 1.0.6)