message: Determined tab view height when segmented on ios
diff: @@ -24,10 +24,11 @@ class TabBar extends React.Component<any, any> {
  var {children, barTintColor, selectedTintColor, unselectedTintColor, bottomTabs, scrollable, segmented, swipeable} = this.props;
  var tabBarItems = React.Children.toArray(children).filter(child => !!child);
  var titleOnly = !tabBarItems.find(({props}: any) => props.title && props.image);
  + var tabViewHeight = swipeable ? (titleOnly ? 48 : 72) : 56
  + tabViewHeight = Platform.OS === 'android' ? tabViewHeight : 28;
  var TabBar = !segmented ? NVTabBar : NVSegmentedTabBar;
  var TabView = swipeable ? NVTabLayout : NVTabNavigation;
  TabView = Platform.OS === 'android' ? TabView : NVSegmentedControl;
  - var NVTab
  var tabLayout = (Platform.OS === 'android' || segmented) && (
  <TabView
  selectedTintColor={selectedTintColor}
  @@ -35,8 +36,8 @@ class TabBar extends React.Component<any, any> {
  selectedIndicatorAtTop={bottomTabs}
  scrollable={scrollable}
  style={{
  - backgroundColor: barTintColor,
  - height: swipeable ? (titleOnly ? 48 : 72) : 56
  + height: tabViewHeight,
  + backgroundColor: barTintColor
  }} />
  );
  return (
  