xamarin - MvvmCross 升级到 8.x 后，应用程序卡在 SplashScreen

Question

我将所有 MvvmCross 库从 7.1.2 升级到 8.0.0。根据 mvvmcross 文档中的“从 7 升级到 8”教程，我已经实现了必要的更改（覆盖 CreateLogProvider 和 CreateLogFactory 方法并将 iocProvider 作为参数添加到 InitializeFirstChance、InitializeLastChance、InitializeNavigationService 和 CreateApp）：

public class Setup : MvxAndroidSetup
    {
        protected override IMvxAndroidViewPresenter CreateViewPresenter() => new HistoryViewPresenter(ViewAssemblies);

        protected override void InitializeFirstChance(IMvxIoCProvider iocProvider)
        {
            base.InitializeFirstChance(iocProvider);
            //Things are done here
        }

        protected override void InitializeLastChance(IMvxIoCProvider iocProvider)
        {
            base.InitializeLastChance(iocProvider);
            //Things are done here
        }

        protected override IMvxNavigationService InitializeNavigationService(IMvxIoCProvider iocProvider)
        {
            var loader = CreateViewModelLoader(iocProvider);
            Mvx.IoCProvider.RegisterSingleton<IMvxViewModelLoader>(loader);
            InitializeViewDispatcher(iocProvider);
            var dispatcher = CreateViewDispatcher();
            Mvx.IoCProvider.RegisterSingleton(dispatcher);
            var navigationService = new DeepNavigationService(null, loader, dispatcher, iocProvider);
            Mvx.IoCProvider.RegisterSingleton<IMvxNavigationService>(navigationService);
            return navigationService;
        }

       //Another things are done here

        protected override IMvxApplication CreateApp(IMvxIoCProvider iocProvider)
        {
            return new App();
        }

        protected override ILoggerProvider CreateLogProvider()
        {
            return new SerilogLoggerProvider();
        }

        protected override ILoggerFactory CreateLogFactory()
        {
            Serilog.Log.Logger = new LoggerConfiguration()
                .MinimumLevel.Debug()
                .CreateLogger();

            return new SerilogLoggerFactory();
        }
    }

我还在 Core 项目中创建了自定义应用程序启动并设置了此类 RegisterCustomAppStart：

public class AppStart : MvxAppStart
    {
        public AppStart(IMvxApplication application, IMvxNavigationService navigationService) : base(application, navigationService) { }

        protected override Task NavigateToFirstViewModel(object hint = null)
        {
            return NavigationService.Navigate<StartupViewModel>();
        }
    }

public class App : MvxApplication
    {
        public override void Initialize()
        {
            //Services and Singletons are registered here.
            RegisterCustomAppStart<AppStart>();
        }
    }

这是问题所在 - 当我运行应用程序时，我的应用程序卡在 SplashScreen 中。有没有人遇到过类似的问题？在以前的版本中，一切都很好。我会很感激一些建议如何解决这个问题

标签： xamarinmvvmxamarin.androidmvvmcross

Answer 1

我解决了这个问题 - 我改变了行：

var dispatcher = CreateViewDispatcher();

为了：

var dispatcher = Mvx.IoCProvider.Resolve<IMvxViewDispatcher>();

它有效。