createStackNavigator({ T1s: { screen:T1, navigationOptions: { headerTitle: 'T1', headerRight: <HeaderButtons HeaderButtonComponent={NavRightBtn}> <Item title='title' iconName='md-cloud' onPress={()=>{console.log('you pressed here')}} /> </HeaderButtons> } }, T2s: T2 }, { defaultNavigationOptions:{ headerStyle:{ backgroundColor: '#456' }, headerTintColor: '#678', title: 'T2' } })