How can I stop the change event from happening on a
I have a TabNavigator with two tabs. I want to be able to
detect when the user clicks on the non-active tab then check
certain components on the active tab and then depending on the
components either let the user to go to the non-active tab or not.
I have tried using the change event but I can not stop the
tab from actually changing. Is there another event which gets fired
before the change event that I can use?