iOS appears to work although simulator not hearing speech

Author: profexorgeek

WebServices/CognitiveSpeechService/CognitiveSpeechService/CognitiveSpeechService.iOS/CognitiveSpeechService.iOS.csproj

@@ -62,6 +62,7 @@
   <ItemGroup>
     <Compile Include="Main.cs" />
     <Compile Include="AppDelegate.cs" />
+    <Compile Include="Services\iOSMicrophoneService.cs" />
     <None Include="Entitlements.plist" />
     <None Include="Info.plist" />
     <Compile Include="Properties\AssemblyInfo.cs" />
@@ -120,6 +121,9 @@
     <Reference Include="System.Numerics.Vectors" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Microsoft.CognitiveServices.Speech">
+      <Version>1.8.0</Version>
+    </PackageReference>
     <PackageReference Include="Xamarin.Forms" Version="4.2.0.709249" />
     <PackageReference Include="Xamarin.Essentials" Version="1.2.0" />
   </ItemGroup>

WebServices/CognitiveSpeechService/CognitiveSpeechService/CognitiveSpeechService.iOS/Info.plist

@@ -34,5 +34,7 @@
     <string>CognitiveSpeechService</string>
     <key>XSAppIconAssets</key>
     <string>Assets.xcassets/AppIcon.appiconset</string>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Voice transcription requires microphone access</string>
 </dict>
 </plist>

WebServices/CognitiveSpeechService/CognitiveSpeechService/CognitiveSpeechService.iOS/Services/iOSMicrophoneService.cs

@@ -0,0 +1,35 @@
+using System.Threading.Tasks;
+using AVFoundation;
+using CognitiveSpeechService.iOS.Services;
+using CognitiveSpeechService.Services;
+using Xamarin.Forms;
+
+[assembly: Dependency(typeof(iOSMicrophoneService))]
+namespace CognitiveSpeechService.iOS.Services
+{
+    public class iOSMicrophoneService : IMicrophoneService
+    {
+        TaskCompletionSource<bool> tcsPermissions;
+
+        public Task<bool> GetPermissionAsync()
+        {
+            tcsPermissions = new TaskCompletionSource<bool>();
+            RequestMicPermission();
+            return tcsPermissions.Task;
+        }
+
+        public void OnRequestPermissionResult(bool isGranted)
+        {
+            tcsPermissions.TrySetResult(isGranted);
+        }
+
+        void RequestMicPermission()
+        {
+            var session = AVAudioSession.SharedInstance();
+            session.RequestRecordPermission((granted) =>
+            {
+                tcsPermissions.TrySetResult(granted);
+            });
+        }
+    }
+}