MVVMCross与Xamarin.Forms和MasterDetail-Java 学习之路

我正在尝试使用Mvvmcross的Xamarin.Forms主细节导航 .

App.cs

public partial class App : MvxFormsApp
{
    public App()
        : base()
    {
        // The root page of your application
        DependencyService.Register<AppContext>();
        InitializeComponent();
        // MainPage = new MasterDetail(); doing this would raise an InvalidCastException
    }

    protected override void OnParentSet()
    {
    }

    protected override void OnStart()
    {
        base.OnStart();
        // Handle when your app starts
        // Initiate Navigation and navigate to the splashscreen
    }
...

App.xaml中：

<core:MvxFormsApp
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:controls="clr-namespace:Stago.Mhp.Instr.Pocm.Core.Controls;assembly=Stago.Mhp.Instr.Pocm.Core"
xmlns:converters="clr-namespace:Stago.Mhp.Instr.Pocm.Core.Converters;assembly=Stago.Mhp.Instr.Pocm.Core"
xmlns:forms9Patch="clr-namespace:Forms9Patch;assembly=Forms9Patch"
xmlns:core="clr-namespace:MvvmCross.Forms.Presenter.Core;assembly=MvvmCross.Forms.Presenter.Core"
x:Class="Stago.Mhp.Instr.Pocm.Core.App">
<Application.Resources>
    <ResourceDictionary>

        <Color x:Key="BlackC90">#414142</Color>
        <Color x:Key="BlackC50">#939598</Color>
        <Color x:Key="BlackC05">#F1F1F2</Color>
        <Color x:Key="Black.20">#33000000</Color>
        <Color x:Key="Blue">#008DA8</Color>
        <Color x:Key="Red">#EE3524</Color>
        <Color x:Key="Orange">#F6A01A</Color>
        <Color x:Key="White">#F8F8F8</Color>
...

MvxFormsApplicationActivity.cs（Droid方面）

[Activity(Label = "MvxFormsApplicationActivity", ScreenOrientation = ScreenOrientation.Portrait)]
public class MvxFormsApplicationActivity : FormsApplicationActivity
{
    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        Forms.Init(this, bundle);

        var mvxFormsApp = new App();
        mvxFormsApp.MainPage = new MasterDetail();
        LoadApplication(mvxFormsApp);

        var presenter = Mvx.Resolve<IMvxViewPresenter>() as MvxFormsDroidPagePresenter;
        presenter.MvxFormsApp = mvxFormsApp;

        Mvx.Resolve<IMvxAppStart>().Start();
    }
}

不幸的是，没有考虑ResourceDictionary，我的应用程序没有问题 .

如果我删除mvvmcross集成并直接从Application（当然是App.cs和App.Xaml）继承，它就可以了 .

Edit 对于那些从头开始关注此问题的人：通过将主页面分配放在 MvxFormsApplicationActivity 中解决了异常 .

MVVMCross与Xamarin.Forms和MasterDetail

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