我是一个MAUI和移动的应用程序开发的新手，在最近的iOS更新后，我面临着从Xamarin.Forms到MAUI的强制迁移。问题是MAUI的模式导航并不像我期望的那样工作。代码如下：

private async void btnSend_Tapped(object sender, EventArgs e)
{
    await Shell.Current.GoToAsync("//MainPage/TakePicture/SendPicture/OtpCheck");

    if (Variables.CurrentPicture.Otp == 0)
    {
        ....
    }

    await Shell.Current.Navigation.PopToRootAsync();

在我设置的OtpCheck页面的xaml中：

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             ...
             x:Class="SkyObservers.Pages.OtpCheck"
             Shell.PresentationMode="Modal">

我希望“if（Variables...”只有在OtpCheck页面关闭时才能到达，但它并不像这样工作。页面被加载，然后突然消失，因为“PopToRootAsync”立即到达。在Xamarin中。表单不能这样工作，所以我也尝试了
await Navigation.PushModalAsync(new OtpCheck());
而不是
await Shell.Current.GoToAsync("//MainPage/TakePicture/SendPicture/OtpCheck");
但结果是一样的
P.S.页面的路由（希望）在AppShell.xaml中正确注册：

<ShellContent Title="SkyObservers" ContentTemplate="{DataTemplate local:MainPage}" Route="MainPage" />
<ShellContent Title="Take New Picture" ContentTemplate="{DataTemplate pages:TakePicture}" Route="MainPage/TakePicture" />
<ShellContent Title="Send Picture" ContentTemplate="{DataTemplate pages:SendPicture}" Route="MainPage/TakePicture/SendPicture" />
<ShellContent Title="Check OTP" ContentTemplate="{DataTemplate pages:OtpCheck}" Route="MainPage/TakePicture/SendPicture/OtpCheck" />

在AppShell.xaml.cs中

public AppShell()
{
    InitializeComponent();

    Routing.RegisterRoute("MainPage/TakePicture", typeof(TakePicture));
    Routing.RegisterRoute("MainPage/TakePicture/SendPicture", typeof(SendPicture));
    Routing.RegisterRoute("MainPage/TakePicture/SendPicture/OtpCheck", typeof(OtpCheck));
}