[IOS >= 15] Issue with getting GetDefaultWindow()

[amahera]

By using the current version of GetDefaultWindow() we have to add a delay after such call - await MediaPicker.PickPhotoAsync();

I believe that this can be fixed in such way:
for iOS>=15

UIApplication.SharedApplication.ConnectedScenes
.OfType()
.SelectMany(s => s.Windows)
.First(w => w.IsKeyWindow);

[Alex-Dobrynin]

what is the difference between current implementaion and your suggestion?

[amahera]

@Alex-Dobrynin Sorry, it was not the only change that I've tried, so I believe that the actual problem is this part of code
while (topVC.PresentedViewController != null)
{
topVC = topVC.PresentedViewController;
}
and if we use await Task.Delay before calling crop we wait till PresentedViewController becomes null (from the previous UIController with image picker for example)

[amahera]

In case if it's needed for modal navigation - maybe here we can check if PresentedViewController is Microsoft.Maui.Platform.ModalWrapper(but it's internal, so maybe check by type name). And allow such assigning if that our modal navigation.

[amahera]

I would like to propose something like this

public static UIViewController GetRootViewController(this UIApplication application)
{
    var window =  OperatingSystem.IsIOSVersionAtLeast(15)
        ? application.ConnectedScenes
            .OfType<UIWindowScene>()
            .SelectMany(s => s.Windows)
            .First(w => w.IsKeyWindow)
        : UIApplication.SharedApplication.Windows.Last();

    var top = window.RootViewController!;

    if (top.PresentedViewController != null && top.PresentedViewController.GetType().Name.Contains("ModalWrapper", StringComparison.InvariantCultureIgnoreCase))
    {
        top = top.PresentedViewController;
    }

    return top;
}

[Alex-Dobrynin]

From my point of view there is bug in MediaPicker, not in this lib. as they setting the result and then closing activity.

protected override void OnActivityResult(int requestCode, Result resultCode, Intent? data)
{
	base.OnActivityResult(requestCode, resultCode, data);

	// we have a valid GUID, so handle the task
	if (GetIntermediateTask(guid, true) is IntermediateTask task)
	{
		if (resultCode == Result.Canceled)
		{
			task.TaskCompletionSource.TrySetCanceled();
		}
		else
		{
			try
			{
				data ??= new Intent();

				task.OnResult?.Invoke(data);

				task.TaskCompletionSource.TrySetResult(data);
			}
			catch (Exception ex)
			{
				task.TaskCompletionSource.TrySetException(ex);
			}
		}
	}

	// close the intermediate activity
	Finish();
}

you may create an issue in MAUI's github and describe your case. or even PR, just change the order of calls.

[amahera]

yeah, seems like that

[Alex-Dobrynin]

Same in ios

picker.Delegate = new PhotoPickerDelegate
{
	CompletedHandler = async info =>
	{
		GetFileResult(info, tcs);
		await vc.DismissViewControllerAsync(true);
	}
};