I tried subscribing for events to detect focus change with below event handlers.
For Focus
UITextFieldObject.EditingDidBegin += EditingDidBegin;
OR
UITextFieldObject.Started += EditingStarted;
For lost Focus
UITextFieldObject.EditingDidEnd += EditingDidEnd;
OR
UITextFieldObject.Ended += EditingEnded;
But these events are not invoked while UITextfield is focused or lost focus.
Can some one please help me out with the issue??