C# IMvxBundle类代码示例

        public static void CallBundleMethod(this IMvxViewModel viewModel, MethodInfo methodInfo, IMvxBundle bundle)
        {
            var parameters = methodInfo.GetParameters().ToArray();
            if (parameters.Count() == 1
                && parameters[0].ParameterType == typeof(IMvxBundle))
            {
                // this method is the 'normal' interface method
                methodInfo.Invoke(viewModel, new object[] { bundle });
                return;
            }

            if (parameters.Count() == 1
                && !MvxSingletonCache.Instance.Parser.TypeSupported(parameters[0].ParameterType))
            {
                // call method using typed object
                var value = bundle.Read(parameters[0].ParameterType);
                methodInfo.Invoke(viewModel, new[] { value });
                return;
            }

            // call method using named method arguments
            var invokeWith = bundle.CreateArgumentList(parameters, viewModel.GetType().Name)
                                   .ToArray();
            methodInfo.Invoke(viewModel, invokeWith);
        }

        public virtual IMvxViewModel Load(Intent intent, IMvxBundle savedState, Type viewModelTypeHint)
        {
            if (intent == null)
            {
                MvxTrace.Error("Null Intent seen when creating ViewModel");
                return null;
            }

            if (intent.Action == Intent.ActionMain)
            {
                MvxTrace.Trace("Creating ViewModel for ActionMain");
                return this.DirectLoad(savedState, viewModelTypeHint);
            }

            if (intent.Extras == null)
            {
                MvxTrace.Trace("Null Extras seen on Intent when creating ViewModel - have you tried to navigate to an MvvmCross View directly? Will try direct load");
                return this.DirectLoad(savedState, viewModelTypeHint);
            }

            IMvxViewModel mvxViewModel;
            if (this.TryGetEmbeddedViewModel(intent, out mvxViewModel))
            {
                MvxTrace.Trace("Embedded ViewModel used");
                return mvxViewModel;
            }

            MvxTrace.Trace("Attempting to load new ViewModel from Intent with Extras");
            var toReturn = this.CreateViewModelFromIntent(intent, savedState);
            if (toReturn != null)
                return toReturn;

            MvxTrace.Trace("ViewModel not loaded from Extras - will try DirectLoad");
            return this.DirectLoad(savedState, viewModelTypeHint);
        }

        public static void OnCreate(this IMvxFragmentView fragmentView, IMvxBundle bundle, MvxViewModelRequest request = null)
        {
            if (fragmentView.ViewModel != null)
            {
                //TODO call MvxViewModelLoader.Reload when it's added in MvvmCross, tracked by #1165
                //until then, we're going to re-run the viewmodel lifecycle here.
                RunViewModelLifecycle(fragmentView.ViewModel, bundle, request);

                return;
            }

            Fragment fragment = fragmentView as Fragment;
            if (fragmentView == null)
                throw new InvalidOperationException($"Something really weird. ${nameof(fragmentView)} passed is not a Fragment!");

            // as it is called during onCreate it is safe to assume that fragment has Activity attached.
            var viewModelType = fragmentView.FindAssociatedViewModelType(fragment.Activity.GetType());
            var view = fragmentView as IMvxView;

            var cache = Mvx.Resolve<IMvxMultipleViewModelCache>();
            var cached = cache.GetAndClear(viewModelType, fragmentView.UniqueImmutableCacheTag);

            view.OnViewCreate(() => cached ?? LoadViewModel(fragmentView, bundle, fragment.Activity.GetType(), request));

        }

        public virtual IMvxViewModel Load(Type viewModelType,
                                    IMvxBundle parameterValues,
                                    IMvxBundle savedState)
        {
            IMvxViewModel viewModel;
            try
            {
                viewModel = (IMvxViewModel)Mvx.IocConstruct(viewModelType);
            }
            catch (Exception exception)
            {
                throw exception.MvxWrap("Problem creating viewModel of type {0}", viewModelType.Name);
            }

            try
            {
                CallCustomInitMethods(viewModel, parameterValues);
                if (savedState != null)
                {
                    CallReloadStateMethods(viewModel, savedState);
                }
                viewModel.Start();
            }
            catch (Exception exception)
            {
                throw exception.MvxWrap("Problem initialising viewModel of type {0}", viewModelType.Name);
            }

            return viewModel;
        }

//		private static IMvxBundle GetSavedStateFromBundle(Bundle bundle)
//        {
//            if (bundle == null)
//                return null;
//
//            IMvxSavedStateConverter converter; 
//            if (!Mvx.TryResolve<IMvxSavedStateConverter>(out converter))
//            {
//                MvxTrace.Trace("No saved state converter available - this is OK if seen during start");
//                return null;
//            }
//            var savedState = converter.Read(bundle);
//            return savedState;
//        }

        private static IMvxViewModel LoadViewModel(this IMvxUnityView unityView, IMvxBundle savedState = null)
        {
#warning NullViewModel needed?
            // how to do N
            //if (typeof (TViewModel) == typeof (MvxNullViewModel))
            //    return new MvxNullViewModel() as TViewModel;

            if (unityView.Request == null)
            {
                MvxTrace.Trace(
                    "Request is null - assuming this is a TabBar type situation where ViewDidLoad is called during construction... patching the request now - but watch out for problems with virtual calls during construction");
                unityView.Request = Mvx.Resolve<IMvxCurrentRequest>().CurrentRequest;
            }

            var instanceRequest = unityView.Request as MvxViewModelInstanceRequest;
            if (instanceRequest != null)
            {
                return instanceRequest.ViewModelInstance;
            }

            var loader = Mvx.Resolve<IMvxViewModelLoader>();
			
            var viewModel = loader.LoadViewModel(unityView.Request, savedState);
            if (viewModel == null)
                throw new MvxException("ViewModel not loaded for " + unityView.Request.ViewModelType);
            return viewModel;
        }

        public virtual IMvxViewModel Load(Intent intent, IMvxBundle savedState, Type viewModelTypeHint)
        {
            if (intent == null)
            {
                MvxTrace.Error( "Null Intent seen when creating ViewModel");
                return null;
            }

            if (intent.Action == Intent.ActionMain)
            {
                MvxTrace.Trace("Creating ViewModel for ActionMain");
                var loaderService = Mvx.Resolve<IMvxViewModelLoader>();
                var viewModelRequest = MvxViewModelRequest.GetDefaultRequest(viewModelTypeHint);
                var viewModel = loaderService.LoadViewModel(viewModelRequest, savedState);
                return viewModel;
            }

            if (intent.Extras == null)
            {
                MvxTrace.Error(
                               "Null Extras seen on Intent when creating ViewModel - this should not happen - have you tried to navigate to an MvvmCross View directly?");
                return null;
            }

            IMvxViewModel mvxViewModel;
            if (TryGetEmbeddedViewModel(intent, out mvxViewModel))
            {
                MvxTrace.Trace("Embedded ViewModel used");
                return mvxViewModel;
            }

            MvxTrace.Trace("Loading new ViewModel from Intent with Extras");
            return CreateViewModelFromIntent(intent, savedState);
        }

        public virtual IMvxViewModel Reload(IMvxViewModel viewModel,
                                   IMvxBundle parameterValues,
                                   IMvxBundle savedState)
        {
            RunViewModelLifecycle(viewModel, parameterValues, savedState);

            return viewModel;
        }

        protected IDevice GetDeviceFromBundle(IMvxBundle parameters)
        {
            if (!parameters.Data.ContainsKey(DeviceIdKey)) return null;
            var deviceId = parameters.Data[DeviceIdKey];

            return Adapter.ConnectedDevices.FirstOrDefault(d => d.Id.ToString().Equals(deviceId));

        }

        protected override void InitFromBundle(IMvxBundle parameters)
        {
            // TODO get and cast incomming bundle to the parameter passed from FirstViewModel
            // details here
            // https://github.com/MvvmCross/MvvmCross/wiki/ViewModel--to-ViewModel-navigation

            base.InitFromBundle(parameters);
        }

 protected override void InitFromBundle(IMvxBundle parameters)
 {
     string value;
     if (parameters.Data != null && parameters.Data.TryGetValue("StationId", out value))
     {
         _followStation = _followService.GetFollowStation(value);
     }
 }

        protected override void InitFromBundle(IMvxBundle parameters)
        {
            var nutritionTable = parameters.Read<NutritionTable>();

            Score = NutritionService.GetScore(nutritionTable);

            Balance = Mvx.Create<BalanceViewModel>();
            Balance.Update(nutritionTable);
        }

 public MvxViewModelRequest(Type viewModelType, 
                            IMvxBundle parameterBundle,
                            IMvxBundle presentationBundle,
                            MvxRequestedBy requestedBy)
 {
     ViewModelType = viewModelType;
     ParameterValues = parameterBundle.SafeGetData();
     PresentationValues = presentationBundle.SafeGetData();
     RequestedBy = requestedBy;
 }

        public void Bind(IMvxViewModel viewModel, IMvxBundle parameterValues = null, IMvxBundle savedState = null)
        {
            var controllerAware = viewModel as IControllerAware;
            if (controllerAware != null)
            {
                var viewModelType = viewModel.GetType();
                var name = viewModelType.FullName.Replace("ViewModel", "Controller");

                Type controllerType = GetControllerTypeForViewModel(_getCreateableTypes(), viewModel);

                if (controllerType == null)
                {
                    throw new ArgumentException(string.Format("Controller for view model {0} cannot be found.", viewModelType));
                }

                try
                {
                    var controller = (IMvxController) Mvx.IocConstruct(controllerType);
                    controllerAware.AttachController(controller);

                    var viewModelAware = controller as IViewModelAware;
                    if (viewModelAware != null)
                    {
                        viewModelAware.AttachViewModel(viewModel);
                    }

                    try
                    {
                        CallControllerInitMethods(controller, parameterValues);
                        if (savedState != null)
                        {
                            CallReloadStateMethods(controller, savedState);
                        }

                    }
                    catch (Exception ex)
                    {
                        MvxTrace.Error("MvxControllers: Problem initialising controller of type {0} - problem {1}",
                            controllerType.Name, ex.ToLongString());

                        throw;
                    }

                    controller.WaitForInitialize();
                }
                catch (Exception ex)
                {
                    MvxTrace.Error("MvxControllers: Problem creating controller of type {0} - problem {1}",
                        controllerType,
                        ex.ToLongString());

                    throw;
                }
            }
        }

        public IMvxViewModel LoadViewModel(MvxViewModelRequest request, IMvxBundle savedState)
        {
            if (request.ViewModelType == typeof (MvxNullViewModel))
            {
                return new MvxNullViewModel();
            }

            var viewModelLocator = FindViewModelLocator(request);

            return LoadViewModel(request, savedState, viewModelLocator);
        }

		protected override async void InitFromBundle(IMvxBundle parameters)
		{
			base.InitFromBundle (parameters);

			// TODO: heavy loading here
			Loading = "Loading...";
			Mvx.Trace (MvxTraceLevel.Diagnostic, "Before delay... instance id: {0:X}", this.GetHashCode());
			await Task.Delay (3000);
			Loading = null;
			Mvx.Trace (MvxTraceLevel.Diagnostic, "After delay...");
		}