Bug when invoking PickPhotoAsync from a UIAlertView click handler

When calling TakePhotoAsync or PickPhotoAsync from inside a click hander on a UIAlertView the UI that it brings up appears where the UIAlertView was and the disappears after a second. Calling TakePhotoAsync from anywhere else seems to work fine. In the code I have here PickPhotoClick, calls PickPhotoAsync after setting some options.

vwContent.AddGestureRecognizer (new UITapGestureRecognizer ( async gesture =>
{
        // Calling this here works just fine
	// await PickPhotoClick ();
	
	var alert = new UIAlertView ();
	alert.Title = "Add a photo";
	alert.Message = "Choose a way to add a photo";
	alert.AddButton ("Take Photo");
	alert.AddButton ("Pick Photo");
	alert.AddButton ("Cancel");
	alert.Clicked += async (sender, e) =>
	{
		if (e.ButtonIndex == 1)
		{
                      // This does not work
	              await PickPhotoClick ();	
		}
		else if (e.ButtonIndex == 0)
		{
                      // This does not work
	              await TakePhotoClick ();
		}
	};

	alert.Show ();
}));

Version Number of Plugin: 2.6.2 Device Tested On: iPhone 6 plus Simulator Tested On: N/A

Expected Behavior

When calling TakePhotoAsync or PickPhotoAsync from a UIAlertView click handler the ui appears full screen and is usable.

Actual Behavior

Ui appears in a small box where the alert view used to be and then disappears after a second.

Steps to reproduce the Behavior

1. Create an alert dialog where the click handler calls TakePhotoAsync or PickPhotoAsync
2. Tap your button on the alert dialog and watch the problem occur.

[benevbright]

This issue will affect to more people because XF 2.3.4-pre release changed to use UIAlertController from old one. My project also calls PickPhotoAsync from ActionSheet button event, and I updated to XF 2.3.4-pre6 and Gallery never showed up on iOS. It does not happened on XF 2.3.3.

Thankfully, James’ adviced putting small delay worked for workaround.

[jamesmontemagno]

Work around for ignoring alertcontrollers can be found in latest beta.