how to display headers in react navigation with TabNavigation
问题 I noticed that views in StackNavigation show the header title but if I set those same screens in a TabNavigation it doesn't show a header. It only shows a header if I wrap a StackNavigation either around each tab, or wrap the TabNavigation nested inside a StackNavigation. Why don't screens in TabNavigation show a header - is that expected behavior? If so, is it better to have a StackNavigation in each tab, or one big StackNavigation around the TabNavigation? // tabs navigation doesn't show a