RegisterNavigationServiceAppStart期间的MvxIoCResolveException

Question

在调用RegisterNavigationServiceAppStart期间，我得到异常：MvvmCross.Platform.Exceptions.MvxIoCResolveException：找不到类型MvvmCross.Core.ViewModels.MvxNavigationServiceAppStart的构造函数失败在调试期间一切正常。但是当我构建版本并准备一个apk时，我得到了这个例外。下面我从设备监视器粘贴日志：

03-01 14：10：49.667：E / mono（21855）：未处理异常：03-01 14：10：49.667：E / mono（21855）：MvvmCross.Platform.Exceptions.MvxIoCResolveException：找不到类型MvvmCross的构造函数.Core.ViewModels.MvxNavigationServiceAppStart`1 [[AppMMobile.DataService.ViewModels.MainViewModel，AppMMobile.DataService，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = null]] 03-01 14：10：49.667：E / mono（ 21855）：在MvvmCross.Platform.IoC.MvxSimpleIoCContainer.IoCConstruct（System.Type type）[0x0002b] in：0 03-01 14：10：49.667：E / mono（21855）：at MvvmCross.Platform.Mvx.IocConstruct [ T]（）[0x00006] in：0 03-01 14：10：49.667：E / mono（21855）：在MvvmCross.Platform.Mvx.ConstructAndRegisterSingleton [TInterface，TType]（）[0x00006] in：0 03-01 14：10：49.667：E / mono（21855）：在MvvmCross.Core.ViewModels.MvxApplication.RegisterNavigationServiceAppStart [TViewModel]（）[0x00000] in <593dd944ead4429db9881ce186989310>：0 03-01 14：10：49.667：E / mono（ 21855）：在MappMMobile.DataService.App.Initialize（）[0x0001a]中：0 03 -01 14：10：49.667：E / mono（21855）：在<593dd944ead4429db9881ce186989310中的MvvmCross.Core.Platform.MvxSetup.InitializeApp（MvvmCross.Platform.Plugins.IMvxPluginManager pluginManager，MvvmCross.Core.ViewModels.IMvxApplication app）[0x00007] >：0 03-01 14：10：49.667：E / mono（21855）：在<593dd944ead4429db9881ce186989310>中的MvvmCross.Core.Platform.MvxSetup.InitializeSecondary（）[0x000b4]：0 03-01 14：10：49.667：E / mono（21855）：在MvvmCross.Droid.Platform.MvxAndroidSetupSingleton.b__7_0（System.Object被忽略）[0x00000] in <9d2864708eca4fb99992263d063bbc38>：0 03-01 14：10：49.667：E / mono（21855）：at System。 Threading.QueueUserWorkItemCallback.WaitCallback_Context（System.Object state）[0x00007] in：0 03-01 14：10：49.667：E / mono（21855）：at System.Threading.ExecutionContext.RunInternal（System.Threading.ExecutionContext executionContext，System .Threading.ContextCallback回调，System.Object状态，System.Boolean preserveSyncCtx）[0x00071] in：0 03-01 14：10：49.667：E / mono（21855）：at System.Threading.Ex ecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，System.Object state，System.Boolean preserveSyncCtx）[0x00000] in：0 03-01 14：10：49.667：E / mono（21855）：在System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem（）[0x00021] in：0 03-01 14：10：49.667：E / mono（21855）：at System.Threading.ThreadPoolWorkQueue.Dispatch（）[0x00074 ] in：0 03-01 14：10：49.667：E / mono（21855）：在System.Threading._ThreadPoolWaitCallback.PerformWaitCallback（）[0x00000] in：0

    public class App : MvvmCross.Core.ViewModels.MvxApplication
    {
            public override void Initialize()
            {
            CreatableTypes()
                .EndingWith("Service")
                .AsInterfaces()
                .RegisterAsLazySingleton();

            RegisterNavigationServiceAppStart<ViewModels.MainViewModel>();
            [Registering my types...]
            }
     }

你能告诉我我做错了什么吗？

Answer 1

确保你的android项目中有一个文件LinkerPleaseInclude.cs与this content：

using System;
using System.Collections.Specialized;
using System.Windows.Input;
using Android.App;
using Android.Views;
using Android.Widget;
using MvvmCross.Binding.BindingContext;
using MvvmCross.Core.Navigation;
using MvvmCross.Core.ViewModels;

namespace MyNamespace
{
    // This class is never actually executed, but when Xamarin linking is enabled it does how to ensure types and properties
    // are preserved in the deployed app
    public class LinkerPleaseInclude
    {
        public void Include(Button button)
        {
            button.Click += (s,e) => button.Text = button.Text + "";
        }

        public void Include(CheckBox checkBox)
        {
            checkBox.CheckedChange += (sender, args) => checkBox.Checked = !checkBox.Checked;
        }

        public void Include(Switch @switch)
        {
            @switch.CheckedChange += (sender, args) => @switch.Checked = [email protected];
        }

        public void Include(View view)
        {
            view.Click += (s, e) => view.ContentDescription = view.ContentDescription + "";
        }

        public void Include(TextView text)
        {
            text.AfterTextChanged += (sender, args) => text.Text = "" + text.Text;
            text.Hint = "" + text.Hint;
        }

        public void Include(CheckedTextView text)
        {
            text.AfterTextChanged += (sender, args) => text.Text = "" + text.Text;
            text.Hint = "" + text.Hint;
        }

        public void Include(CompoundButton cb)
        {
            cb.CheckedChange += (sender, args) => cb.Checked = !cb.Checked;
        }

        public void Include(SeekBar sb)
        {
            sb.ProgressChanged += (sender, args) => sb.Progress = sb.Progress + 1;
        }

        public void Include(RadioGroup radioGroup)
        {
            radioGroup.CheckedChange += (sender, args) => radioGroup.Check(args.CheckedId);
        }

        public void Include(RadioButton radioButton)
        {
            radioButton.CheckedChange += (sender, args) => radioButton.Checked = args.IsChecked;
        }

        public void Include(RatingBar ratingBar)
        {
            ratingBar.RatingBarChange += (sender, args) => ratingBar.Rating = 0 + ratingBar.Rating;
        }

        public void Include(Activity act)
        {
            act.Title = act.Title + "";
        }

        public void Include(INotifyCollectionChanged changed)
        {
            changed.CollectionChanged += (s,e) => { var test = $"{e.Action}{e.NewItems}{e.NewStartingIndex}{e.OldItems}{e.OldStartingIndex}"; };
        }
        public void Include(ICommand command)
        {
            command.CanExecuteChanged += (s, e) => { if (command.CanExecute(null)) command.Execute(null); };
        }

        public void Include(MvvmCross.Platform.IoC.MvxPropertyInjector injector)
        {
            injector = new MvvmCross.Platform.IoC.MvxPropertyInjector ();
        } 
        public void Include(System.ComponentModel.INotifyPropertyChanged changed)
        {
            changed.PropertyChanged += (sender, e) =>  {
                var test = e.PropertyName;
            };
        }

        public void Include(MvxTaskBasedBindingContext context)
        {
            context.Dispose();
            var context2 = new MvxTaskBasedBindingContext();
            context2.Dispose();
        }
        public void Include(MvxNavigationService service, IMvxViewModelLoader loader)
        {
            service = new MvxNavigationService(null, loader);
        }
        public void Include(ConsoleColor color)
        {
            Console.Write("");
            Console.WriteLine("");
            color = Console.ForegroundColor;
            Console.ForegroundColor = ConsoleColor.Red;
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.ForegroundColor = ConsoleColor.Magenta;
            Console.ForegroundColor = ConsoleColor.White;
            Console.ForegroundColor = ConsoleColor.Gray;
            Console.ForegroundColor = ConsoleColor.DarkGray;
        }
    }
}

它将确保链接器不会剥离MvvmCross工作所需的类，属性等。这就是可能发生的事情

HIH