无法从 xamarin 表单 ios 应用程序中的根页面导航到页面

Question

我有一个使用 Prism 开发的 Xamarin 表单应用程序。 我在 IOS 中面临的问题是我无法从下面的方法导航到 CreateAccount 页面。但是相同的代码在 UWP 中完美运行。

  protected async override void OnInitialized()
    {
        InitializeComponent();            
        await NavigationService.NavigateAsync($"NavigationPage/LoginPage");
    }

 protected override void RegisterTypes(IContainerRegistry 
 containerRegistry)
    {
     containerRegistry.RegisterForNavigation<CreateAccount, CreateAccountViewModel>();            
   containerRegistry.RegisterForNavigation<LoginPage,LoginViewModel>();
   containerRegistry.RegisterForNavigation<ForgotPassword>();
   }

当我像下面这样替换上面的行时，导航正在发生，但 ViewModel 没有被注册。

 containerRegistry.RegisterForNavigation<CreateAccount>(); 

AppDelegate.cs

[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{        
    public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {
        global::Xamarin.Forms.Forms.Init();
        LoadApplication(new App(new iOSInitializer()));

        return base.FinishedLaunching(app, options);
    }

}

public class iOSInitializer : IPlatformInitializer
{

    public void RegisterTypes(IContainerRegistry containerRegistry)
    {            
    }
}
}

CreateAccountPageViewModel：

public class CreateAccountViewModel : BasePageViewModel, 
INavigationAware
 {  
  public static INavigationService _navigationService;

  public CreateAccountViewModel(INavigationService navigationService)
        : base(navigationService)
     {
    _navigationService = navigationService;
    }
    } 

感谢任何帮助。

Answer 1

解决方案：

尝试在RegisterTypes 中注册NavigationPage。

  protected override void RegisterTypes(IContainerRegistry
containerRegistry)
        {
            containerRegistry.RegisterForNavigation<CreateAccount, CreateAccountViewModel>();
            containerRegistry.RegisterForNavigation<LoginPage, LoginViewModel>();
            containerRegistry.RegisterForNavigation<ForgotPassword>();

            //add
            containerRegistry.RegisterForNavigation<NavigationPage>();
        }