Inject OsuTKMicrophoneHandler on ios target.

osu.Framework.Microphone.Tests.iOS/AppDelegate.cs

@@ -2,13 +2,26 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using Foundation;
+using osu.Framework.Input.Handlers.Microphone;
 using osu.Framework.iOS;
+using osu.Framework.iOS.Input;
 
 namespace osu.Framework.Tests
 {
     [Register("AppDelegate")]
     public class AppDelegate : GameAppDelegate
     {
-        protected override Game CreateGame() => new VisualTestGame();
+        protected override Game CreateGame() => new TestingVisualTestGame();
+
+        internal class TestingVisualTestGame : VisualTestGame
+        {
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                // Need to cache IOSMicrophoneHandler in here to let MicrophoneInputManager knows.
+                Host.Dependencies.CacheAs(typeof(OsuTKMicrophoneHandler), new IOSMicrophoneHandler());
+            }
+        }
     }
 }

osu.Framework.Microphone.Tests.iOS/osu.Framework.Microphone.Tests.iOS.csproj

@@ -40,6 +40,10 @@
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\osu.Framework.Microphone.iOS\osu.Framework.Microphone.iOS.csproj">
+      <Project>{431614f4-d662-4cbd-b6c2-3e0d79ca968b}</Project>
+      <Name>osu.Framework.Microphone.iOS</Name>
+    </ProjectReference>
     <ProjectReference Include="..\osu.Framework.Microphone\osu.Framework.Microphone.csproj">
       <Project>{D0F85C61-800A-4645-8633-AC59208FA732}</Project>
       <Name>osu.Framework.Microphone</Name>

osu.Framework.Microphone.iOS/Input/IOSMicrophoneHandler.cs

@@ -10,7 +10,7 @@ public class IOSMicrophoneHandler : OsuTKMicrophoneHandler
     {
         public override bool IsActive => throw new System.NotImplementedException();
 
-        public IOSMicrophoneHandler(int device) : base(device)
+        public IOSMicrophoneHandler() : base(-1)
         {
         }
 

osu.Framework.Microphone/Input/MicrophoneInputManager.cs

@@ -5,18 +5,30 @@
 using osu.Framework.Input.Handlers.Microphone;
 using osu.Framework.Input.StateChanges.Events;
 using osu.Framework.Input.States;
+using System;
 
 namespace osu.Framework.Input
 {
     public class MicrophoneInputManager : CustomInputManager
     {
-        private readonly OsuTKMicrophoneHandler handler;
-
         protected override InputState CreateInitialState() => new MicrophoneInputState(new MicrophoneState());
 
+        private readonly int deviceId;
+
         public MicrophoneInputManager(int device = -1)
         {
-            AddHandler(handler = new OsuTKMicrophoneHandler(device));
+            deviceId = device;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            // Use handler like iOS microphone handler if there's exist handler in dependencies.
+            if (Host.Dependencies.Get(typeof(OsuTKMicrophoneHandler)) is OsuTKMicrophoneHandler handler)
+                AddHandler(Activator.CreateInstance(handler.GetType()) as OsuTKMicrophoneHandler);
+            else
+                AddHandler(new OsuTKMicrophoneHandler(deviceId));
         }
 
         public override void HandleInputStateChange(InputStateChangeEvent inputStateChange)