CODEWITHSUNDEEP
iosmaui
Adriano
Adriano

Reputation: 61

Maui app crash on IOS with 'Window was already deactivated'

Launching app with attached debbuger. Moving the app in background the app crash with following error:

[0:] An error occurred: 'Window was already deactivated'. Callstack: '   at Microsoft.Maui.Controls.Window.Microsoft.Maui.IWindow.Deactivated()
   at Microsoft.Maui.LifecycleEvents.AppHostBuilderExtensions.<>c.<OnConfigureLifeCycle>b__2_4(UIApplication app)
   at Microsoft.Maui.MauiUIApplicationDelegate.<>c__DisplayClass15_0.<OnResignActivation>b__0(OnResignActivation del)
   at Microsoft.Maui.LifecycleEvents.LifecycleEventServiceExtensions.InvokeLifecycleEvents[OnResignActivation](IServiceProvider services, Action`1 action)
   at Microsoft.Maui.MauiUIApplicationDelegate.OnResignActivation(UIApplication application)
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 58
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 94
   at CFFTCheckInMobile.Program.Main(String[] args) in D:\CheckInMobile\CheckInMobile\Platforms\iOS\Program.cs:line 13
   at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args)
   at System.Reflection.MethodBaseInvoker.InvokeDirectByRefWithFewArgs(Object obj, Span`1 copyOfArgs, BindingFlags invokeAttr)'
The app has been terminated.

After the error, the app restart and then the error never appear.

Platforms\iOS\Program.cs ha the following code:

public class Program
{
    // This is the main entry point of the application.
    static void Main(string[] args)
    {
        // if you want to use a different Application Delegate class from "AppDelegate"
        // you can specify it here.
        UIApplication.Main(args, null, typeof(AppDelegate));
    }
}

The app.xaml.cs has the following code

public partial class App : Application
{
    public static readonly Api Api = new();
    public static readonly Functions Functions = new();
    public App()
    {
        InitializeComponent();
                    
        MainPage = new NavigationPage(new LoadingPage());
    }

The loadingpage has a viewmodel with following code:

public async Task LoadingTask()
{
    try
    {
        using (await loading.Show())
        {
            .............

            ((App)Application.Current).MainPage = new NavigationPage(new MainPage(true));

        }            
    }

When i try to move the app in background the app is showing "MainPage"

The "await loading.Show()" is using mopups

Any ideas ?

Removing the code "((App)Application.Current).MainPage = new NavigationPage(new MainPage(true));" but nothing change.

Upvotes: 2

Views: 740

Answers (3)

Adriano
Adriano

Reputation: 61

i found a solution for same issue here: https://github.com/LuckyDucko/Mopups/issues/95

    public override void OnActivated(UIApplication application)
  {
      (application.ConnectedScenes.AnyObject as UIWindowScene)?.Windows.FirstOrDefault()?.MakeKeyWindow();
      base.OnActivated(application);
  }

  public override void OnResignActivation(UIApplication application)
  {
      (application.ConnectedScenes.AnyObject as UIWindowScene)?.Windows.FirstOrDefault()?.MakeKeyWindow();
      base.OnResignActivation(application);
  }

Your solution is similar. Thanks

Upvotes: 4

Omar Navarro
Omar Navarro

Reputation: 1

You can resolve this issue with this, on AppDelegate, you can apply it to your needs.

    public override void OnActivated(UIApplication application)
    {
        try
        {
            base.OnActivated(application);
        }
        catch (Exception ex)
        {
            
        }
    }
}

}

Upvotes: 0

Adriano
Adriano

Reputation: 61

Solved. I removed using (await loading.Show()); declaration from LoadingPage.

Upvotes: 0

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