Rg.Plugins.Popup.Exceptions.RGPopupStackInvalidException: 'The page has not been pushed yet or has been removed already'

[SuriGabi]

HI LuckyDucko,

The problem still persists with the new version! (Tested on android platform all versions) I have created a new project and I am using Rg.Plugins.Popup 2.1.0.

If you use the sample code (see below) you can easily get the following error: Rg.Plugins.Popup.Exceptions.RGPopupStackInvalidException: 'The page has not been pushed yet or has been removed already' Version 1.1.5.188 did not have this error.

It this a sample:

MainActivity inserted line: Rg.Plugins.Popup.Popup.Init(this);

Make new PopupPage view: (XAML)

<pages:PopupPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup" xmlns:animations="clr-namespace:Rg.Plugins.Popup.Animations;assembly=Rg.Plugins.Popup" x:Class="SCL.Dialogs.MessageBar" BackgroundColor="Transparent" InputTransparent="False" BackgroundInputTransparent="True" HasSystemPadding="False" CloseWhenBackgroundIsClicked="True"> pages:PopupPage.Animation

</pages:PopupPage.Animation>

</pages:PopupPage>

(CS) using System; using System.Threading.Tasks;

using Xamarin.Forms;

using Rg.Plugins.Popup.Pages; using Rg.Plugins.Popup.Services;

namespace SCL.Dialogs { public partial class MessageBar : PopupPage { public MessageBar(string title, Color color) { InitializeComponent();

    var swipeTitle = new SwipeGestureRecognizer() { Direction =  SwipeDirection.Up };
    swipeTitle.Swiped += lTitle_Gestured;
    lTitle.GestureRecognizers.Add(swipeTitle);

    var tapTitle = new TapGestureRecognizer();
    tapTitle.Tapped += lTitle_Gestured;
    lTitle.GestureRecognizers.Add(tapTitle);

    lTitle.Text = title;
    slTitle.BackgroundColor = color;
}

protected override void OnAppearing()
{
    base.OnAppearing();

    HidePopup();
}

public async void lTitle_Gestured(object sender, EventArgs e)
{
    await PopupNavigation.Instance.RemovePageAsync(this);
}

private async void HidePopup()
{
    await Task.Delay(2000);
    await PopupNavigation.Instance.RemovePageAsync(this);
}

} }

And create mainview add button with clicked event private async void Button_Clicked(object sender, EventArgs e) { await PopupNavigation.Instance.PushAsync(new MessageBar("POPUP!!! Please click repeatedly and crash!!!", Color.Red)); }

Please click the button repeatedly and quickly. After 10-15 clicks you will get the crash

Thanks for yout help! Have nice day!

[gabriele-ricci-kyklos]

I had the same problem showing a popup and then calling a Task.Delay, if the user clicks to dismiss the popup before the delay finished, the popup gets removed from the stack for some reason I don't understand. I solved by checking the stack first, since I have only 1 popup at the time:

if(PopupNavigation.Instance.PopupStack.Any())
{
    await PopupNavigation.Instance.PopAsync();
}

[LennoxP90]

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