Rg.Plugins.Popup - null reference exception on iOS - xamarin

Question

I use Rg.Plugins.Popup in my Xamarin Forms app. This is working on Android but I have issue on iOS.
This is my control(base on PopupPage):
<pages:PopupPage
BackgroundColor="White"
x:Class="MyApp.Controls.PopupAlert"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:pages="http://rotorgames.com"
Padding="50,10">
<Frame
BackgroundColor="White"
CornerRadius="25"
HeightRequest="150"
VerticalOptions="Center"
WidthRequest="200">
<StackLayout>
<Label
FontAttributes="Bold"
FontSize="Title"
HorizontalOptions="Center"
HorizontalTextAlignment="Center"
Text="MyApp"
TextColor="Black" />
<Label
x:Name="LblMes"
Margin="0,5"
FontSize="Subtitle"
HorizontalOptions="CenterAndExpand"
TextColor="Black"
HorizontalTextAlignment="Center"
VerticalOptions="CenterAndExpand" />
<BoxView Style="{StaticResource Separator}" />
<Label
Margin="0,6,0,0"
FontAttributes="Bold"
FontSize="Subtitle"
HorizontalTextAlignment="Center"
HorizontalOptions="Center"
Text="OK"
TextColor="{StaticResource PrimaryColor}"
VerticalOptions="Center">
<Label.GestureRecognizers>
<TapGestureRecognizer Tapped="OkTapped" />
</Label.GestureRecognizers>
</Label>
</StackLayout>
</Frame>
</pages:PopupPage>
This is code:
public partial class PopupAlert
{
public PopupAlert()
{
InitializeComponent();
}
public void Init(String message)
{
LblMes.Text = message;
}
private async void OkTapped(object sender, EventArgs e)
{
await PopupNavigation.Instance.PopAsync();
}
}
I call my popup and I see it:
private readonly PopupAlert _popAlert = new PopupAlert();
private bool _isShow = false;
public async Task ShowMessage(string message)
{
//await App.Current.MainPage.DisplayAlert(AppRes.AppTitle, message, "Ok");
try
{
if (_isShow)
{
return;
}
_isShow = true;
_popAlert.Init(message);
await PopupNavigation.Instance.PushAsync(_popAlert);
}
finally
{
_isShow = false;
}
}
But I clicking button "Ok" I have exception:
StackTrace " at Rg.Plugins.Popup.IOS.Platform.PopupPlatformRenderer.PrefersStatusBarHidden ()
[0x00000] in
C:\\Users\\mhvdi\\Documents\\OpenSource\\Rg.Plugins.Popup\\Rg.Plugins.Popup\\Platforms\\Ios\\Platform\\PopupPlatformRenderer.cs:61 \n at (wrapper managed-to-native) UIKit.UIA…" string
This is my AppDelegate:
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
Rg.Plugins.Popup.Popup.Init();
global::Xamarin.Forms.Forms.Init();
....
}
How can I fix this issue?

Answer 1

1.I find the problem only happens in the latest version of Rg.Plugins.Popup 2.0.0.8.
2.Use a earlier version will work like 2.0.0.7.
3.An issue has been reported in the Github.
4.Check if the stack is empty before popping the stack:
if (Rg.Plugins.Popup.Services.PopupNavigation.Instance.PopupStack.Any())
{
await PopupNavigation.Instance.PopAsync();
}

Answer 2

I faced the same problem and it solved by get the latest version 2.0.0.9