flutter iOS 无法使用麦克风，permission_handler 问题

我尝试在我的 flutter 应用程序中使用麦克风。我创建方法尝试询问用户有关麦克风权限的信息。它可以在 Android 上运行，但不能在 iOS 上运行。当然，我将这一行添加到 info.plist 中：

<key>NSMicrophoneUsageDescription</key>
<string>Used to capture audio for image picker plugin</string>

我询问使用小部件的权限：

Widget allowButton() {
   return OutlinedButton(
       child: Text("ALLOW MIC"),
       onPressed: () async {
         var status = await Permission.microphone.request().then((value) {
           print("After request()");
           return value;
         });
         print(status);
         if (await Permission.microphone.request().isGranted) {
           print("OK!!!");
         } else {
           print("NOT OK!!!");
         }
       });
 } 

有关图书馆和环境的更多信息：

• 权限处理程序：^8.1.6
• 颤振2.2.2
• MacOS 11.6 上的 IDE VSCode
• 我尝试重建项目（使用“flutter clean”）

In my app settings I do not see information about microphone. Of course camera and gallery access working.

Add PERMISSION_MICROPHONE=1在你的 PodFile 中

Check PodFile https://github.com/Baseflow/flutter-permission-handler/blob/master/permission_handler/example/ios/Podfile以供参考

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)

    target.build_configurations.each do |config|
      # You can remove unused permissions here
      # for more infomation: https://github.com/BaseflowIT/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      # e.g. when you don't need camera permission, just add 'PERMISSION_CAMERA=0'
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',

        ## dart: PermissionGroup.calendar
        # 'PERMISSION_EVENTS=1',

        ## dart: PermissionGroup.reminders
        # 'PERMISSION_REMINDERS=1',

        ## dart: PermissionGroup.contacts
        # 'PERMISSION_CONTACTS=1',

        ## dart: PermissionGroup.camera
        'PERMISSION_CAMERA=1',

        ## dart: PermissionGroup.microphone
        'PERMISSION_MICROPHONE=1',

        ## dart: PermissionGroup.speech
        # 'PERMISSION_SPEECH_RECOGNIZER=1',

        ## dart: PermissionGroup.photos
        'PERMISSION_PHOTOS=1',

        ## dart: [PermissionGroup.location, PermissionGroup.locationAlways, PermissionGroup.locationWhenInUse]
        # 'PERMISSION_LOCATION=1',
       
        ## dart: PermissionGroup.notification
        # 'PERMISSION_NOTIFICATIONS=1',

        ## dart: PermissionGroup.mediaLibrary
        'PERMISSION_MEDIA_LIBRARY=1',

        ## dart: PermissionGroup.sensors
        # 'PERMISSION_SENSORS=1',

        ## dart: PermissionGroup.bluetooth
        # 'PERMISSION_BLUETOOTH=1',

        ## dart: PermissionGroup.appTrackingTransparency
        # 'PERMISSION_APP_TRACKING_TRANSPARENCY=1',

        ## dart: PermissionGroup.criticalAlerts
        # 'PERMISSION_CRITICAL_ALERTS=1',
      ]

    end
  end
end