Question

嘿大家我正在使用Autofac（MVVM）我的问题是如何通过单击弹出屏幕中的确定按钮从DisplayAlert Popup重定向到另一个页面？由于显示警报在我的视图和我的ViewModel中，因此ICommand导航到另一个页面是导航器。

         PushAsync<PageViewModel>();

我的一些代码剪辑：

的ViewModels

   public class HomePageViewModel : ViewModelBase
   {
    private readonly INavigator _navigator;

    public HomePageViewModel(INavigator navigator)
    {
        _navigator = navigator;
        CmdInvites = new Command(Cmdinvites);
    }

    public ICommand CmdInvites { get; private set; }


    //Invite PhoneBook
    private void Cmdinvites()
    {
        _navigator.PushAsync<PhoneContactViewModel>();
    }

  }


 zxing.OnScanResult += (result) =>
 Device.BeginInvokeOnMainThread(async () => {
 // Stop analysis until we navigate away so we don't keep reading barcodes
     zxing.IsAnalyzing = false;
     // Show an alert
     await DisplayAlert("Scanned Barcode", result.Text, "OK");
     // Navigate away
     await Navigation.PopAsync();
      <-------------this is where i want to redirect the {Binding CmdInvites}           
 });

感谢您抽出时间阅读我的帖子。

Answer 1

您可以使用另一个 DisplayAlert 方法构造函数，如下所示：

Device.BeginInvokeOnMainThread(async () => {
 // Stop analysis until we navigate away so we don't keep reading barcodes
     zxing.IsAnalyzing = false;
     // Show an alert
     if(await DisplayAlert("Scanned Barcode", result.Text, "Accept","Cancel"))
     {
     // Navigate away
     await Navigation.PopAsync();
      <-------------this is where i want to redirect the {Binding CmdInvites}
     }      
 });

从DisplayAlert Popup Xamarin.Form重定向到另一个页面

1 个答案: