Widget _capsuleTabBar(BuildContext context) {
    return TDBottomTabBar(
      TDBottomTabBarBasicType.iconText,
      componentType: TDBottomTabBarComponentType.label,
      outlineType: TDBottomTabBarOutlineType.capsule,
      useVerticalDivider: true,
      navigationTabs: [
        TDBottomTabBarTabConfig(
          selectedIcon: _selectedIcon,
          unselectedIcon: _unSelectedIcon,
          tabText: '标签',
          onTap: () {
            onTapTab(context, '标签1');
          },
        ),
        TDBottomTabBarTabConfig(
          selectedIcon: _selectedIcon,
          unselectedIcon: _unSelectedIcon,
          tabText: '标签',
          onTap: () {
            onTapTab(context, '标签2');
          },
        ),
        TDBottomTabBarTabConfig(
          selectedIcon: _selectedIcon,
          unselectedIcon: _unSelectedIcon,
          tabText: '标签',
          onTap: () {
            onTapTab(context, '标签3');
          },
        ),
      ],
    );
  }