System.InvalidOperationException has been thrown. ViewController can't be null.

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💬 Questions and Help

I want to use Xamarin MediaManager in my MonoGame iOS game to play videos. But the problem is that I always get this exception in the following line in Programs.cs:

UIApplication.Main(args, null, typeof(Program));

System.InvalidOperationException has been thrown. ViewController can't be null.

I get the exception after this code is executed in Game1.cs:

var gameController = Services.GetService(typeof(UIViewController)) as UIViewController; gameController.PresentViewController(new DisplayVideoController(), true, null);

Is it possible to use MonoGame's gameController with Xamarin MediaManager?

Programs.cs:

using Foundation;
using MediaManager;
using UIKit;
using SharedCode;

namespace Testios
{
[Register("AppDelegate")]
class Program : UIApplicationDelegate
{
    private static Game1 game;         

    internal static void RunGame()
    {
        game = new Game1();
        game.Run();
    }

    static void Main(string[] args)
    {
        UIApplication.Main(args, null, typeof(Program));
    }

    public override void FinishedLaunching(UIApplication app)
    {
        CrossMediaManager.Current.Init();

        RunGame();         
    }     
} 
}

DisplayVideoController.cs:

using MediaManager;
using MediaManager.Platforms.Ios.Video;
using UIKit;

namespace Testios
{
public class DisplayVideoController : UIViewController
{
    public DisplayVideoController()
    {
    }

    public override void ViewDidLoad()
    {
        var videoView = new VideoView(this.View.Frame)
        {
            AutoresizingMask = UIViewAutoresizing.All,
        };

        this.View!.AddSubview(videoView);
        CrossMediaManager.Current.MediaPlayer.VideoView = videoView;
        CrossMediaManager.Current.MediaItemFinished += Current_MediaItemFinished;
    }

    public override async void ViewWillAppear(bool animated)
    {
        base.ViewWillAppear(animated);
        await CrossMediaManager.Current.Play("https://videos.pexels.com/video-files/7356431/7356431-hd_1280_720_25fps.mp4");
    }

    private void Current_MediaItemFinished(object? sender, MediaManager.Media.MediaItemEventArgs e)
    {
        this.DismissViewControllerAsync(true);
    }
}
}

Game1.cs:

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MediaManager;
using Microsoft.Xna.Framework.Media;

namespace SharedCode
{
public class Game1 : Game
{
    private GraphicsDeviceManager _graphics;
    private SpriteBatch _spriteBatch;

    public Game1()
    {
        _graphics = new GraphicsDeviceManager(this);
        Content.RootDirectory = "Content";
        IsMouseVisible = true;
    }

    protected override void Initialize()
    {
        base.Initialize();
    }

    protected override async void LoadContent()
    {
        _spriteBatch = new SpriteBatch(GraphicsDevice);

        var gameController = Services.GetService(typeof(UIViewController)) as UIViewController;
        gameController.PresentViewController(new DisplayVideoController(), true, null);
    }

    protected override void Update(GameTime gameTime)
    {
        base.Update(gameTime);
    }

    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.Clear(Color.CornflowerBlue);
        base.Draw(gameTime);
    }
}
}