Question

我的应用程序中有一个带有两个选项卡的TabbedPage，我想使用NavigateAsync导航到一个特定的选项卡，但当我使用NavigationService.NavigateAsync（＆＃34; NavigationPage / TabbedPage / SelectedPage＆＃34;）时，我的应用程序打开只有SelectedPage与堆栈中的TabbedPage。我可以单击SelectedPage中的后退按钮返回TabbedPage。

有没有人知道出了什么问题？

这是我的TabbedPage axml：

<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
            xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
            xmlns:local="correct namespace was hide"
            xmlns:prism="clr-namespace:Prism.Mvvm;assembly=Prism.Forms"
            prism:ViewModelLocator.AutowireViewModel="True"
            x:Class="correct namespace was hide">
    <TabbedPage.Children>
        <local:Pacientes/>
        <local:Sobre/>
    </TabbedPage.Children>
</TabbedPage>

这是我的OnInitialized方法和App类中的RegisterTypes：

protected override async void OnInitialized()
        {
            InitializeComponent();

            if (Device.RuntimePlatform.Equals(Device.Android))
            {
                await NavigationService.NavigateAsync("Android.Main/OdontoWayPacienteNavigation/Sobre");
            }
            else
            {
                await NavigationService.NavigateAsync("/NavigationPage/iOS.Main/Sobre");
            }
        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            containerRegistry.RegisterForNavigation<OdontoWayPacienteNavigation>();
            containerRegistry.RegisterForNavigation<NavigationPage>();
            containerRegistry.RegisterForNavigation<Pacientes>();
            containerRegistry.RegisterForNavigation<Clinicas>();
            containerRegistry.RegisterForNavigation<PacienteEdit>();
            containerRegistry.RegisterForNavigation<ClinicaMap>();
            containerRegistry.RegisterForNavigation<LinkWeb>();
            containerRegistry.RegisterForNavigation<Sobre>();
            containerRegistry.RegisterForNavigation<Views.Android.PacienteAcessos, PacienteAcessosViewModel>("Android.PacienteAcessos");
            containerRegistry.RegisterForNavigation<Views.iOS.PacienteAcessos, PacienteAcessosViewModel>("iOS.PacienteAcessos");
            containerRegistry.RegisterForNavigation<Views.Android.Main, MainViewModel>("Android.Main");
            containerRegistry.RegisterForNavigation<Views.iOS.Main>("iOS.Main");
        }

Answer 1

该解决方案已发布在此链接https://forums.xamarin.com/discussion/comment/330770#Comment_330770

导航的行为在棱镜版本7中发生了变化。打开特定选项卡的新行为是

NavigateAsync("TabbedPage?selectedTab=PageName")

无法使用Prism Navigation在TabbedPage中打开特定页面

1 个答案: