Widget _iconTypeTabBar(BuildContext context) {
    return TDBottomTabBar(TDBottomTabBarBasicType.icon, useVerticalDivider: true, navigationTabs: [
      TDBottomTabBarTabConfig(
          selectedIcon: _selectedIcon,
          unselectedIcon: _unSelectedIcon,
          onTap: () {
            onTapTab(context, '标签1');
          }),
      TDBottomTabBarTabConfig(
          selectedIcon: _selectedIcon,
          unselectedIcon: _unSelectedIcon,
          onTap: () {
            onTapTab(context, '标签2');
          })
    ]);
  }